LAFCO
Napa County Mosquito Abatement District MSR (2005)
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LOCAL AGENCY FORMATION COMMISSION OF NAPA COUNTY
COMPREHENSIVE STUDY
NAPA COUNTY MOSQUITO ABATEMENT DISTRICT
Municipal Service Review
Final Report
February 2005
Prepared by:
LAFCO of Napa County
Daniel Schwarz, Executive Officer
Keene Simonds, Analyst
Kathy Mabry, Commission Secretary
1700 Second Street, Suite 268
Napa, California 94559
(707) 259-8645
http://napa.lafco.ca.gov
MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
INTRODUCTION
On January 1, 2001, the Cortese-Knox-Hertzberg Local Government Reorganization Act
became the governing law of LAFCOs. One change brought by this Act was the creation
of a new LAFCO function, the service review. California Government Code §56430
states that prior to any review or update of a sphere of influence, the Commission shall
conduct a service review – a comprehensive evaluation of the ability of the agency to
provide service within its existing jurisdiction and within its sphere. California
Government Code §56425(f) states that the Commission shall update all spheres every
five years, meaning that the Commission must also conduct service reviews on a five-
year cycle. Each of the 58 LAFCOs may adopt their own approach to fulfilling the
service review and sphere update requirements.
To fulfill these responsibilities, LAFCO of Napa County adopted a schedule for service
reviews and sphere updates to begin in late 2001 and end in late 2005. In developing this
schedule, the Commission determined that the complex assignment before it must be
accomplished through a series of studies. Some of these studies are designed to conduct
an analysis of one type of service across many agencies and/or areas in Napa County,
while other studies focus on the breadth of services offered by one agency. Overlap is an
inherent component of this approach – any given agency may be evaluated in the context
of several studies. As a result, there is the possibility that reports later in the schedule
will give rise to reconsideration of conclusions drawn in an earlier study. In addition, this
approach means that LAFCO will not fully meet its statutory obligations until the
completion of its adopted schedule. When the schedule is completed, the Commission
will evaluate the need for future studies and develop a schedule for the 2006-2010 cycle.
As part of the service review process, the Commission is required to consider and make
written determinations with regard to nine service factors enumerated under California
Government Code §56430. These factors are intended to capture the legislative intent of
the service review process and offers LAFCO key information to inform policy
determinations necessary to complete a sphere of influence review. These factors are:
1. Infrastructure needs or deficiencies.
2. Growth and population projections for the affected area.
3. Financing constraints and opportunities.
4. Cost avoidance opportunities.
5. Opportunities for rate restructuring.
6. Opportunities for shared facilities.
7. Government structure options.
8. Evaluation of management efficiencies.
9. Local accountability and governance.
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MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
Comprehensive Study of the Napa County Mosquito Abatement District
In May 2004, LAFCO of Napa County initiated its Comprehensive Study of the Napa
County Mosquito Abatement District. This report, which was prepared in two phases,
represents the service review portion of the study. “Phase One” involved the
development of a study section for the District, which was circulated for agency and
public review and presented to the Commission at a public workshop on October 9, 2004.
“Phase Two” involved the development of written determinations, which were subject to
a public review process prior to their adoption by the Commission at its February 7, 2005
meeting (LAFCO Resolution No. 05-01). This report codifies both phases.
The next and final phase of the study (“Phase Three”) represents the sphere of influence
review of the District and will be presented as part of a separate report.
Note: The geographic region of the service review is the entire jurisdictional boundary
of the Napa County Mosquito Abatement District, which includes all
unincorporated and incorporated territory in Napa County.
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MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
OVERVIEW
The Napa County Mosquito Abatement District (NCMAD) was formed in 1925 to
provide mosquito control services for residents of Napa County. The formation of the
District was prompted in the early 1920s by the emergence of mosquitoes in the southern
portions of the County, an area characterized by numerous wetlands and salt marshes. In
an effort to address the threat of mosquito-borne diseases and provide protection for
livestock, local landowners in the Carneros region joined forces with the Carneros Farm
Center and the Las Amigas Farm Bureau. The group’s aim was to galvanize support for
the formation of a countywide mosquito abatement district. Formation of this type of
district was allowed by the California Legislature with the passage of the Mosquito
Abatement District Act of 1915. This law was enacted by legislators to facilitate the
formation of public agencies capable of providing protection against vector-borne
diseases, such as malaria and encephalitis, and other pest related nuisances.1 Following
resolutions supporting formation adopted by the three cities of Napa County (Calistoga,
Napa, and St. Helena), the Napa County Board of Supervisors adopted a resolution
establishing the District on July 14, 1925.
In 1926, NCMAD conducted the first comprehensive mosquito survey of Napa County.
The survey, which mapped breeding areas within the County, was followed by the
implementation of physical control measures as part of a coordinated mosquito
management program. This included building dykes and levees along with ditching and
plowing cracked ground. These labor-intensive activities were conducted with assistance
from local inmates who were used frequently by the District as a supplemental work
force. This practice, however, was discontinued in the 1950s due to increased public
concern over the use of inmate labor. Other methods implemented during this period
included chemical and biological control measures, such as applying pesticides and
stocking local waterways with “mosquitofish” (Gambusia affinis).
By the 1960s, following advances in chemical engineering along with budgetary
constraints, NCMAD began to emphasize the use of pesticides to control both larvae and
adult mosquitoes. This included the use of dichlorodiphenyltrichloroethane (DDT).2 By
the 1970s, however, new federal and state regulations, along with increased public
concern regarding the use of chemicals on the environment, prompted a significant
change in the District’s control activities. To minimize its use of pesticides, the District
began to emphasize the control of larvae rather than adult mosquitoes. This change
resulted in a renewed emphasis on mosquito prevention through physical and biological
control measures as well as community education.
In 1978, California voters approved Proposition 13, which limited annual property taxes
to one percent of assessed value while requiring two-thirds voter approval to raise new
taxes. At the time, NCMAD’s budget was almost entirely dependent on revenue
1 California Health and Safety Code defines “vector” as any animal capable of transmitting a human disease or
producing human discomfort or injury, including, but not limited to, mosquitoes, flies, mites, ticks, other arthropods,
and rodents and other vertebrates (HSC §2002(k)).
2 DDT was banned by the United States Environmental Protection Agency in 1973.
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MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
generated from an allocation of local property tax proceeds. The reduction in property
tax proceeds, coupled with increasing costs, significantly constrained operations for the
District. By the end of the 1980s, the District’s expenses outpaced its revenues.
Although staffing was reduced to help meet costs, operating deficits persisted throughout
the late 1980s and early 1990s. As a result, the District borrowed money from the
County to help cover annual losses.
In the late 1990s, NCMAD took a series of steps to achieve fiscal solvency and advance
its mosquito management program. Notably, the District developed a service program
with local landowners to help recover the costs of servicing lands with chronic mosquito
problems. The District also benefited from a 2002 review and update to the California
Health and Safety Code. This process clarified and strengthened the District’s ability to
recover costs from negligent property owners with reoccurring mosquito problems.
Measures to advance NCMAD’s mosquito management program included the hiring of a
new manager and issuing an in-depth evaluation of its control services as part of its
Integrated Mosquito Management Program (1999). The evaluation, which included a
review of potential environmental impacts, formalized the District’s mosquito
management program to include six coordinated activities. These activities include
surveillance, physical control, vegetation management, biological control, chemical
control, and community education.
In 2003, to enhance its revenue stream, NCMAD asked Napa County property owners to
approve an annual parcel assessment to help strengthen its mosquito management
program and fund additional vector control services.3 The assessment was also sought to
help prepare for the anticipated arrival of the West Nile Virus in Napa County by 2004.
The assessment was conducted by mail-in ballot and was approved by two-thirds of
responding property owners. Initial revenues generated from the assessment have been
used to increase staff, raise public awareness regarding West Nile Virus, and develop
three new vector control programs relating to yellowjackets, ticks, and rodents.
GOVERNANCE AND PRINCIPAL ACT POWERS
NCMAD was originally organized under the Mosquito Abatement District Act of 1915
(Health and Safety Code §2000-2093). This Act was amended in 2002 and is now
referred to as the Mosquito Abatement and Vector Control District Law. The District’s
governing body is comprised of an appointed six-member board of trustees. District
trustees are composed of appointed members from each of the five cities and County and
serve two-year or four-year staggered terms: term lengths and reappointments are at the
discretion of the appointing jurisdiction. In addition to electing a president, the District is
required to elect a secretary at the first meeting in January. A secretary may be either a
trustee or employee of the District.
3 In 2003/2004 fiscal year, the annual assessment for a single-family residence was $15. The assessment is set for
adjustment according to the U.S. Department of Labor’s Consumer Price Index. The maximum annual increase is
three percent. The increase, which is not automatic, is exercised at the discretion of the District.
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MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
NCMAD services can be financed through property taxes, special taxes, special benefit
assessments, fees, and fines.4 District board meetings are conducted on the second
Wednesday of every month at its administrative office in American Canyon. Meetings
are open to the public. Although they serve without regular compensation, trustees
receive $49.50 per month for expenses incurred while conducting business on behalf of
the District. Pursuant to the Mosquito Abatement and Vector Control District Law, the
District is authorized to provide the following municipal services:
• Conduct surveillance programs and other appropriate studies of vectors and
vector-borne diseases (HSC §2040-a)
• Take any and all necessary or proper actions to prevent the occurrence of vectors
and vector-borne diseases (HSC §2040-b)
• Take any and all necessary or proper actions to abate or control vectors and
vector-borne diseases (HSC §2040-c)
ADOPTED BOUNDARIES
NCMAD’s adopted jurisdictional boundary is comprised of one contiguous area
consisting of approximately 506,517 acres. The District’s jurisdictional boundary is
conterminous with its sphere of influence and includes all lands within Napa County.
Accordingly, the District is under the land use authority of multiple jurisdictions,
including the County of Napa and the Cities of American Canyon, Calistoga, Napa, St.
Helena, and the Town of Yountville.5
Adopted Boundaries for the NCMAD
(Source: County of Napa’s geographic information system)
Jurisdictional Boundary: 506,517 acres *
Sphere of Influence Boundary: 506,517 acres *
SERVICE OPERATIONS
NCMAD’s vector control services include a long-standing mosquito management
program and three new programs relating to yellowjackets, ticks, and rodents. The new
programs were initiated in late 2003 and are not fully developed at this time.
4 California Health and Safety Code allows NCMAD to impose a civil penalty – not to exceed $1,000 per day –
against any landowner for each day that the owner fails to comply with its requirements with regard to preventing a
vector-borne nuisance on his or her property (HSC §2063). This penalty is applied in the form of a lien on the
landowner’s property.
5 Pursuant to California Health and Safety Code §2040, NCMAD regularly conducts operations outside its
jurisdictional boundary when such operations are to the benefit of Napa County residents.
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MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
Administration and Staff:
The District’s vector control services are managed and operated by its staff. A manager
is appointed by the board of trustees to administer the adopted policies of the District and
provide direction to staff. The District’s administrative office is located at 15 Melvin
Road in the City of American Canyon. Office hours are Monday through Friday between
8:00 am and 4:30 pm. Staff is currently comprised of nine full-time employees. This
includes a manager, office assistant, entomologist, and six field technicians.
Field Services:
The District divides Napa County into six service zones (Attachment Two). The
District’s six field technicians are assigned to zones based on need. All District staff are
certified by the California Department of Health Services (DHS) as “vector control
technicians.” This permits each staff member to use pesticides for the purposes of
mosquito control, invertebrate vector control, and vertebrate vector control. Staff must
annually complete three all-day training and safety classes as part of their certification.
In addition, staff must participate in quarterly training sessions held by the District.
SERVICE DEMANDS
NCMAD service demands relating to mosquito control are based on a combination of
factors, including seasonal conditions, breeding habits, and the presence of stagnant
water. Between late fall and early spring, the District typically provides extensive
surveillance and control work for seasonal wetlands and marshes, as stagnant water
develops and becomes host to the Winter Marsh Mosquito and the Winter Salt Marsh
Mosquito. During late spring through early fall, the District normally transitions its
surveillance and control work to ditches, creeks, wastewater ponds, tidal marshes, fish
ponds, man-made containers, and storm water systems, as irrigation, sewage, and storm
waters stagnate and become host to various mosquito species. This includes the Summer
Salt Marsh Mosquito, Little Horse Mosquito, Encephalitis Mosquito, Fish Pond
Mosquito, Foul Water Mosquito, and the Western Treehole Mosquito.
Collectively, these efforts supplement year-round activities conducted by NCMAD to
monitor and control other mosquito species commonly found in Napa County throughout
various times of the year. Service demands relating to yellowjackets primarily occur
during the summer months, while service demands relating to ticks and rodents are
generally year-round. Other factors impacting service demands include development
projects, community concerns, and the emergence of new vector-borne diseases and
viruses.
Service Calls:
In 2003, the District received approximately 1,500 service calls. All calls resulted in a
field investigation. The District does not charge a service fee to property owners unless
their land develops a reoccurring and long-term mosquito problem.
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MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
Service Contracts:
The District currently maintains 14 service contracts with local property owners
throughout the Napa Valley to provide long-term mosquito control services for their land.
These property owners pay a flat hourly labor charge and reimburse the District for the
cost of materials, such as pesticides or rental of special equipment.6
MOSQUITO MANAGEMENT PROGRAM
NCMAD provides mosquito control services for Napa County residents through various
surveillance and control measures. These activities collectively constitute the District’s
mosquito management program. The primary objective of this program is to prevent the
emergence of adult mosquitoes while minimizing impacts to the environment by
emphasizing long-term forms of control (i.e., non-chemical). In 1999, to formalize the
program, the District issued a comprehensive study of its mosquito control services with
respect to the California Environmental Quality Act. The study, which included an
adopted mitigated negative declaration, concluded that the program would not result in a
significant impact to the environment based on the application of mitigating measures.
The District’s mosquito management program is comprised of six coordinated activities.
These activities include surveillance, physical control, vegetation management, biological
control, chemical control, and community education. These activities are summarized
below.
Surveillance:
Surveillance serves as the District’s initial tool to monitor and control mosquitoes within
Napa County. The District’s surveillance programs are facilitated through trapping
systems, field investigations, and the use of sentinel chickens.7 The information
generated from surveillance helps the District evaluate the type and number of
mosquitoes within a targeted area along with identifying the presence of vector-borne
diseases. Surveillance is also used to help measure the effectiveness of any given control
activity undertaken by the District. Blood samples collected by the District from sentinel
chickens are analyzed by DHS in Richmond, California.8 Samples of mosquitoes,
yellowjackets, and ticks collected by the District are analyzed by staff.
Physical Control:
Physical control serves as the District’s primary tool to reduce mosquito habitat by
modifying land to help remove natural and man-made breeding grounds. This includes
building dykes and levees along with ditching and plowing cracked ground. These
actions help to eliminate stagnant water sources by improving water circulation and
drainage of low-lying areas and local waterways. The District maintains a regional
6 NCMAD’s flat hourly labor rate is currently $38.39 and is adjusted according to the Consumer Price Index.
7 NCMAD presently maintains six sentinel chicken stations located throughout Napa County. Each station consist of
ten chickens. The chickens, which are immune to most vector-borne diseases, are routinely tested for exposure to
Western Equine Encephalitis, Saint Louis Encephalitis, and West Nile Virus.
8 In 2003, NCMAD collected 140 blood samples. All 140 samples tested negative for a vector-borne disease.
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MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
permit with DHS, which is issued by the United States Army Corps of Engineers. DHS
reviews all proposed work plans by the District prior to implementation to ensure
conformance with environmental regulations.9
Vegetation Management:
The District occasionally supplements its physical control activities with a vegetation
management program. In addition to the physical removal of vegetation, this program
involves the application of herbicides within terminal water bodies, such as wastewater
ponds, to impede growth and improve water circulation. Common herbicides used by the
District include Round Up, Rodeo, and Karmex DF.
Biological Control:
Biological control is used by the District both as a long-term and short-term strategy to
manage larvae and prevent adult emergence. The District’s primary biological control
method involves stocking ponds, reservoirs, and other stagnant water sources with
mosquitofish, which feed on larvae. Mosquitofish provide long-term control of larvae to
permanent water bodies based on their reproductive capabilities.10 Other biological
control methods used by the District include applying spores generated from the
bacterium Bacillus thuringiensis israelensis (Bti) to stagnant water sources. This method
provides only short-term control of larvae due to its low residual effect and requires
frequent and timely applications to ensure effectiveness.
Chemical Control:
Chemical control is a short-term strategy used by the District to manage both larvae and
adult mosquitoes by applying pesticides either by hand, machine, or aircraft. Pesticides
are not used unless the District determines that other control measures would be
ineffective in mitigating the mosquito population. Primary deterrents associated with the
use of pesticides include cost, low residual effects, and environmental considerations. All
pesticides used by the District are registered with the California Department of Pesticide
Regulation and are summarized in a monthly “Pesticide Use Report” for the Napa County
Agricultural Commissioner.11
The District’s pesticide program is comprised of larvicides (larvae control) and
adulticides (adult control). Larvicides regularly used by the District include the insect
growth regulator Methoprene and Golden Bear 1111. These pesticides are applied using
various forms of distribution and are effective against all mosquito species. Pyrethrum is
the only adulticide used by the District. This pesticide is used to control the Western
Treehole Mosquito and is distributed using a truck mounted ultra-low volume mist
machine during the early morning hours when winds are minimal. Pesticides commonly
used by the District in 2003 are identified below:
9 NCMAD work plans are also reviewed for environmental conformance by the U.S. Fish and Wildlife Service,
California Department of Fish and Game, Army Corp. of Engineers, San Francisco Bay Conservation and
Development Commission, and several local environmental organizations.
10 In 2003, NCMAD released approximately 20 pounds of mosquitofish in several permanent water bodies throughout
the County. The District also provided approximately 30 pounds of mosquitofish to the public.
11 All pesticide work performed by NCMAD is done through a cooperative agreement with DHS.
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MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
NCMAD – Pesticide Use Amount for 2003
Pesticide No. Applications Total Amount
Karmex DF* 103 4,402 pounds
Rodeo* 43 82 gallons
Round-Up* 21 43.75 gallons
Bti 239 218.25 gallons
Methoprene 258 57.82 gallons
Golden Bear 1111* 227 946.61 gallons
Pyrethrum 218 67.04 gallons
Drione* 40 8 pounds
Wasp Freeze* 9 3.25 gallons
Oust* 105 96.77 pounds
* Commercial Name Brands
Community Education:
The District offers a variety of community education tools aimed at raising public
awareness regarding ways to help prevent and reduce local mosquito populations along
with their disease potential. This includes posting educational information on the
District’s website, distributing brochures, presenting to schools, home associations, and
service clubs, and attending the annual Napa-Solano Home and Garden Show.
Mosquito Species of Napa County
NCMAD reports that there are 20 mosquito species within Napa County. Most of these
species breed in specific habitats characterized by the presence of stagnant water and are
all capable of creating nuisance, whether physical or economical.12 There are ten
mosquitoes species commonly found in Napa County. They are the Banded Foul Water
Mosquito, Encephalitis Mosquito, Fish Pond Mosquito, Little Horse Mosquito, Summer
Salt Marsh Mosquito, Western Treehole Mosquito, Winter Marsh Mosquito, Winter Salt
Marsh Mosquito, Woodland Malaria Mosquito, and the Woodland Pool Mosquito.
Known mosquito-borne diseases detected in Napa County include Western Equine
Encephalitis and Canine Heartworm.13 Western Equine Encephalitis affects humans and
is known as the “sleeping sickness.” Symptoms associated with this virus range from
mild headaches to brain inflammation. The primary transmitter of this virus is the
Encephalitis Mosquito, which breeds in fresh and brackish water sources and is present
throughout the year. Canine Heartworm, which affects dogs, coyotes, and foxes, leads to
the development of worm-parasites within the infected animal’s heart and lungs. This
parasite is primarily transmitted by the Western Treehole Mosquito, which breeds in the
holes and cavities of trees, and is typically present between March and July.
12 There are four components to a mosquito’s life cycle: egg, larva, pupa, and adult. Depending on the type of
mosquito, the development cycle from egg to adult ranges from one week to four months. The life span of an adult
mosquito ranges from two weeks to two months.
13 NCMAD reports that Western Equine Encephalitis was last found in Napa County in 1996. Conversely, Canine
Heartworm is prevalent throughout the wooded areas of the County.
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MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
Other viruses regularly monitored by the District include Saint Louis Encephalitis and
West Nile Virus. Saint Louis Encephalitis, which can result in symptoms similar to
Western Equine Encephalitis, affects humans, animals, and birds, and is prone to
outbreaks since being first detected in St. Louis, Missouri in 1933. There has not been a
reported case of Saint Louis Encephalitis in the County. The West Nile Virus also affects
humans, animals, and birds, and causes symptoms similar to Saint Louis Encephalitis.
However, unlike Saint Louis Encephalitis, West Nile Virus is relatively new to North
America. Exposure to this virus has a higher risk of contagiousness relative to other
mosquito-borne viruses due to the lack of antibodies within the population. The first
documented case of West Nile Virus in Napa County occurred on August 4, 2004.14
ADDITIONAL PROGRAMS
In late 2003, NCMAD expanded its services to include three new vector control
programs. These programs, which vary in scope, relate to yellowjackets, ticks, and
rodents. Funding for these programs derives from part of an annual assessment approved
by Napa County property owners in July of 2003; actual proceeds generated from this
assessment were made available to the District beginning in December 2003. These
additional vector control programs are summarized below.
Yellowjacket Control Program:
The District’s Yellowjacket Control Program is comprised of two coordinated activities
aimed at controlling and managing yellowjackets in Napa County. These activities
include chemical control and community education. Chemical control is achieved by
applying a pesticide (Drione) to a yellowjacket’s nest, while community education is
achieved by answering constituent inquiries, public speaking events, brochures, and
posting information on the District’s website.
Tick Surveillance and Disease Testing Program:
The District’s Tick Surveillance and Disease Testing Program is comprised of monitoring
and community education relating to ticks and their disease potential. Surveillance is
achieved through trapping systems and field investigations. Ticks collected by the
District are tested for Rocky Mountain Spotted Fever and Lyme Disease. These efforts
are complemented by the District’s public outreach activities. These include answering
constituent inquiries, public speaking events, brochures, and posting information on the
District’s website.
Rodent Control Program:
The District’s Rodent Control Program currently consists of community education and
field trappings. Community education is provided by answering constituent’s questions
and posting information on the District’s website. Field trappings are achieved through
bait stations, which are placed at the request of the landowner. Some rodents are also
tested for rodent-borne diseases as part of a regional plague surveillance program, which
is coordinated by DHS. This includes testing for Hantavirus and Arenavirus.
14 West Nile Virus case involved a dead American Crow found in the City of Napa.
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MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
FINANCIAL
NCMAD has an approved operating budget for 2003-2004 of $1,681,833. Expenses for
the District are divided into three categories: salaries and benefits; services and supplies;
and assets and equipment. Appropriations for these categories for the 2003-2004 fiscal
year are $563,833, $328,000, and $739,000 respectively.15 The District also includes a
fixed contingency amount as part of its annual budget. In 2003-2004, this amount is
$51,000.
The District’s projected revenue for 2003-2004 is $1,407,000. Primary revenue sources
include special assessment funds, property tax proceeds, and service charges. The District
currently maintains a carryover reserve of approximately $370,000 from the 2002-2003
fiscal year. In addition to covering shortfalls, this reserve is used to help cover all costs
between July and December prior to the first distribution of property and assessment
funds.
NCMAD – Approved Budget (2003-2004)
Expense Category Amount
Salaries and Benefits: $563,833 (34%)
Services and Supplies: $328,000 (19%)
Assets and Equipment: $739,000 (44%)
Contingencies: $51,000 (3%)
Total Expenses: $1,681,833*
NCMAD – Projected Revenues (2003-2004)
Revenue Source Amount
Special Assessment: $711,000 (50%)
Property Taxes: $643,000 (46%)
Service Charges: $30,000 (2%)
Interest on Property Taxes: $15,000 (1%)
Supplemental Property Taxes: $5,000 (.04%)
Miscellaneous: $3,000 (.02%)
Total Projected Revenue: $1,407,000*
* An operating deficit of $274,833 is projected for the 2003-2004 fiscal year, which is
due to the cost of the District’s new administration building. The District will be
reimbursed for its construction costs from funds generated as part of the Napa County
Flood Project (“Measure A”). In the interim, funds from the District’s carryover
reserve will be applied to cover the deficit.
15 Approximately $540,000 of the $739,000 appropriated for assets and equipment for the 2003-2004 fiscal year is for
the purchase and construction of NCMAD’s new administration office. Construction of the new administration
building, which is scheduled to be complete by October 2004, will represent the first time the District will occupy a
permanent structure.
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MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
WRITTEN DETERMINATIONS
In anticipation of reviewing and updating the Napa County Mosquito Abatement
District’s sphere of influence, and based on the above-mentioned information, the
following written determinations are intended to fulfill the requirements of California
Government Code §56430. When warranted, some determinations include supplemental
information listed in italics to provide context to the underlying service factor. A review
of the District’s sphere of influence will be included as part of a future study.
Infrastructure Needs or Deficiencies:
1. The Napa County Mosquito Abatement District provides vector control services
with respect to mosquitoes, yellowjackets, ticks, and rodents. The District has
appropriately planned its resources to provide effective vector control for
residents of Napa County within the timeframe of this study.
2. Service demands for the Napa County Mosquito Abatement District are guided by
a variety of factors. These factors primarily stem from seasonal, environmental,
and land use activities in Napa County. Based on the variable nature of these
activities, the capacity of the District to effectively address service demands is
dependent on its continued ability to adapt and redirect resources as needed.
3. The Napa County Mosquito Abatement District has established reliable
surveillance procedures to measure the effectiveness of its vector control services.
The use of surveillance as an evaluation standard reduces the District’s
dependency on infrastructure and increases the importance of staff training in
terms of addressing service needs and deficiencies in a timely manner.
Surveillance is conducted by staff and facilitated through field tests and
investigations.
4. The emergence of the West Nile Virus in California precipitated a significant
change in service objectives for the Napa County Mosquito Abatement District.
This change is characterized by an increased vigilance concerning mosquito
abatement and highlights a transition in service priorities from nuisance control to
public safety.
The West Nile Virus, which can cause encephalitis, has recently been detected in
birds found in American Canyon, Napa, and Yountville. It is expected that the
virus will spread throughout Napa County over the next year.
5. The Napa County Mosquito Abatement District recently implemented three new
vector control programs relating to yellowjackets, ticks, and rodents. These new
programs, which complement a long-standing mosquito management program,
may result in a significant increase in service demands for the District. Future
studies should evaluate the development of these new programs and their impact
on the ability of the District to maintain current service levels.
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Growth and Population Projections:
1. Projected population growth within Napa County Mosquito Abatement District’s
jurisdictional boundary will increase at a level identical to projected growth rates
for Napa County. However, any increase in population or development in Napa
County will not have a significant impact on the vector population due to the
presence of vector habitat within both urban and non-urban areas.
2. Population projections issued by the Association of Bay Area Governments
(ABAG) are reasonable estimates of Napa County’s current and future
population. Population projections issued by ABAG for Napa County should be
incorporated and used by the Napa County Mosquito Abatement District as
reasonable population projections for its jurisdictional boundary.
In 2004, ABAG issued Projections 2005 (Draft), which estimates Napa County’s
total population for 2005 at approximately 134,100. These projections estimate
that Napa County will continue to experience an increase in development at an
annual rate of less than one percent through 2025. It is expected that these
projections will be finalized by ABAG within the next year.
3. Future changes in demographics in Napa County present additional service
challenges for the Napa County Mosquito Abatement District regarding the
prevention and control of vector-borne diseases. These challenges emanate from
the introduction of new vector-borne diseases and exposure to existing vector-
borne diseases.
Financing Constraints and Opportunities:
1. In 2003, Napa County property owners approved an annual assessment for the
Napa County Mosquito Abatement District to expand its mosquito abatement
program and to provide new services relating to yellowjackets, ticks, and rodents.
It is expected that this assessment, which more than doubles the revenue
previously generated for the District, will provide sufficient resources to provide
and sustain a higher level of vector control service within the timeframe of this
study.
2. Opportunities for the Napa County Mosquito Abatement District to increase
revenues for its vector control service programs through additional assessments
are constrained by Article XIII of the California Constitution, which requires two-
thirds voter approval to raise special taxes.
Cost Avoidance Opportunities:
1. The Napa County Mosquito Abatement District is empowered under its principal
act to impose a civil penalty against a property owner that has failed to comply
with a notice to prevent a vector nuisance on his or her land. This measure
reinforces the powers of the District and helps to ensure that public funds are not
disproportionately allocated to serve one property at the cost of others.
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MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
California Health and Safety Code §2063 permits NCMAD to impose a civil
penalty in the form of a lien – not to exceed $1,000 per day – against any
property owner for each day that owner fails to comply with notices to take
action to prevent the recurrence of vector nuisance on his or her land.
2. The Napa County Mosquito Abatement District has established a service program
with a number of property owners in Napa County to provide long-term mosquito
abatement services through individual contracts. This program allows the District
to recover its costs for providing a higher level of service from property owners
that have persistent mosquito problems.
3. The Napa County Mosquito Abatement District is a member of the Mosquito and
Vector Control Association of California. This organization is comprised of 56
public agencies and provides its members with a number of valuable services,
including cost avoidance opportunities relating to training services and
publication materials. Other notable services offered by this organization include
serving as a legislative advocate for statewide vector control and abatement issues
and facilitating the exchange of service information between member agencies.
Opportunities for Rate Restructuring:
1. Services provided by the Napa County Mosquito Abatement District are primarily
funded from property taxes and a special assessment. This revenue stream
ensures that each property owner pays a proportionate share of the District’s
operational expenses and supports the equitable distribution of vector control
services in Napa County.
2. The Napa County Mosquito Abatement District has established a reasonable rate
schedule for property owners that have entered into service contracts to receive
long-term mosquito abatement service for their land. This rate schedule, which is
designed only to recover the District’s labor and cost of materials, encourages
cooperation from property owners to pay for a higher level of service to control
reoccurring mosquito problems on their land.
Opportunities for Shared Facilities:
1. The Napa County Mosquito Abatement District works closely with a variety of
federal, state, and local agencies in the development and operation of its vector
control services. These efforts help to coordinate the implementation of effective
vector control measures in Napa County and strengthens regional planning
objectives through shared resources.
NCMAD activities are coordinated with, but not limited to, the U.S. Army
Corps of Engineers, U.S. Fish and Wildlife Service, California Department of
Health Services, California Department of Fish and Game, San Francisco
Regional Water Quality Control Board, San Francisco Bay Conservation and
Development Commission, County of Napa, and the Cities of American
Canyon, Calistoga, Napa, St. Helena, and Yountville.
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MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
2. The Napa County Mosquito Abatement District maintains informal mutual-aid
agreements with the Marin-Sonoma and Solano Mosquito Abatement Districts.
These agreements provide a mechanism for the District to pursue cost-efficiencies
through joint-use projects and support formalizing vector control services within
the North Bay region.
Government Structure Options:
1. The Napa County Mosquito Abatement District is empowered under California
Heath and Safety Code to provide a broad range of services relating to the control
of vectors and vector-borne diseases. Based on its principal act, a decision by the
District to expand its services to include vectors other than mosquitoes,
yellowjackets, ticks, and rodents is not the activation of a new power and does not
need prior approval by LAFCO.
Vector is defined by California Health and Safety Code §2002(k) as any
animal capable of transmitting a human disease or producing human
discomfort or injury. This includes mosquitoes, flies, mites, ticks, other
arthropods, rodents, and other vertebrates.
2. LAFCO is authorized to consider the consolidation or reorganization of two or
more special districts upon an application by the affected agencies or based on the
recommendations of a study prepared pursuant to California Government Code.
Preliminary analysis suggests that consolidation or reorganization of the Napa
County Mosquito Abatement District with a neighboring vector control district
would improve regional objectives, but diminish existing service levels due to the
loss of local control. The loss in local control would limit the ability of the
District to meet the service needs of the community in a timely and efficient
manner.
Based on the recommendations of a study prepared in accordance with
California Government Code Sections §56378, §56425, or §56430, the
Commission is required to make determinations pursuant to 56881(b) with
regard to consolidation or reorganization.
3. The Napa County Mosquito Abatement District has been successful in achieving
its original service objective to provide mosquito control for residents of Napa
County. The District, which has expanded its services to include programs
relating to yellowjackets, ticks, and rodents, continues to serve as an appropriate
instrument in the prevention and control of vectors by localizing costs for the
benefit of its constituents.
Evaluation of Management Efficiencies:
1. The Napa County Mosquito Abatement District provides an annual summary of
past and projected expenditures as part of its annual budget. This budget is
adopted following a publicly noticed board meeting in which members of the
public are allowed to comment and offer suggestions with regard to District
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MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
expenditures. In addition to enhancing the accountability of appointed
representatives, the budget process provides a clear directive towards staff in
terms of prioritizing District resources.
2. In 1999, the Napa County Mosquito Abatement District prepared and adopted a
mitigated negative declaration as part of its Integrated Mosquito Management
Program. This decision represents a strong commitment by the District to provide
sound, effective, and efficient services in concert with the California
Environmental Quality Act.
3. The recent decision by Napa County property owners to approve an annual
assessment for the Napa County Mosquito Abatement District exemplifies the
ability of the District to effectively articulate to its constituents the relationship
between cost and the delivery of a higher level of service.
Local Accountability and Governance:
1. The Napa County Mosquito Abatement District’s board meetings are conducted
once a month and are open to the public. Public inquires involving the District’s
vector control services can be addressed to the Board at this time. Regularly
scheduled meetings provide an opportunity for District constituents to ask
questions of their appointed representatives, while helping to ensure that service
information is being effectively communicated to the public.
2. The Napa County Mosquito Abatement District has established reasonable
measures to maintain public dialogue with its constituents regarding its vector
control services. These efforts, which have helped raise the level of public
awareness regarding vectors and vector-borne diseases, facilitate local
accountability and strengthen the ability of the District to provide effective
service.
These efforts include posting educational information on NCMAD’s website,
submitting letters to local newspapers, distributing brochures, presenting to
schools, home associations, and service clubs, and attending the annual Napa-
Solano Home and Garden Show.
3. The decision by the Napa County Mosquito Abatement District to minimize the
use of pesticides demonstrates a concerted effort by the District to modify its
service programs to reflect the needs of the community.
4. Trustees for the Napa County Mosquito Abatement District are appointed by the
Board of Supervisors and the city councils from each of the five cities in Napa
County. The composition of the Board makes it more accessible to the public and
fosters a countywide range of perspectives regarding existing and future service
needs.
5. The Napa County Mosquito Abatement District is governed by a responsive and
dedicated board and staff. These characteristics enhance local accountability and
cultivate desirable working relationships with members of the public as well as
other agencies.
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MOSQUITO ABATEMENT STUDY: SERVICE REVIEW REPORT LAFCO OF NAPA COUNTY
SOURCES
Agency Contacts:
• Napa County Mosquito Abatement District
• California Department of Pesticide Regulations
• Napa County Agricultural Commissioner
Documents/Materials:
• Napa County Mosquito Abatement District, Re: Response, “LAFCO Questionnaire,”
January 16, 2004
• Napa County Mosquito Abatement District, Re: Response, “LAFCO Supplemental
Questionnaire,” August 23, 2004
• Napa County Mosquito Abatement District, Re: Response, “LAFCO Technical Review
Draft Report,” August 23, 2004
• Napa County Mosquito Abatement District, “2003-2004 Budget,” August 6, 2004
• LAFCO of Napa County, “Napa County Mosquito Abatement District Baseline Report
and Sphere of Influence Establishment,” November 28,1984
• Napa County Mosquito Abatement District, “Integrated Mosquito Management
Program,” October1999
• Napa County Mosquito Abatement District, Re: Letter, “LAFCO of Napa County:
Request for Information,” August 15, 1974
Newspaper/Journal Articles:
• Whitthorne, Robert, “Mosquito Control in the Napa Valley,” Napa County Historical
Society, February 1969
• Yountville Sun, “Voters Elect More Mosquito Tax,” July 24, 2003
Worldwide Web:
• Napa County Mosquito Abatement District: http://www.napamosquito.com (April 20,
2004)
• U.S. Environmental Protection Agency; Pesticides, Mosquito Control:
http://www.epa.gov/pesticides/factsheets/skeeters.htm (April 12, 2004)
• Centers for Disease Control; Division of Vector-Borne Diseases:
http://www.cdc.gov/ncidod/dvbid/index.htm (April 13, 2004)
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