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The Clark County mosquito crew conducts surveillance and abatement activities through the active mosquito season, usually April 1 through October 1, each year. The priority is to attack mosquitoes at their source, by treating mosquito larvae as they hatch. It is far more effective to reduce mosquito populations at their source, before they fly into neighborhoods, than to fog large, open areas in attempt to eliminate adult mosquitoes. It is very difficult to reduce mosquito populations once they have spread from the breeding source.
Control measures used by the crew comply with policies adopted by the Board of Trustees of the Mosquito Control District and with state and Environmental Protection Agency regulations. Biological control methods are used that have the least adverse effect on humans, pets, wildlife, and the environment.
The crew implements an Integrated Pest Management (IPM) program and uses a variety of products and equipment to control mosquitoes. Treatment methods in Clark County include larvicide applied by helicopters, broadcast from trucks, all-terrain vehicles, amphibious vehicles, and on foot from backpack applicators. Larvicide briquettes are placed into storm drains and catch basins. Limited treatment is applied to adult mosquitoes due to the limited effectiveness of this method and the short duration of the materials. Due to legal restrictions, the Mosquito Control District cannot spray or fog neighborhoods or private residences.
The Clark County mosquito control crew works April 1 through October 1 each year. During that time requests for service or information regarding mosquito control can be made through either the 24-hour service request line at 360.574.7906 or on-line service request.
When reporting an area of standing water, please provide the following information:
A mosquito crew will visit the problem area and determine treatment or monitoring needs. You will receive a phone call only if additional information is needed to find the problem site.
Clark County Mosquito Control District, as an essential service, is still serving the community by treating for mosquitoes and responding to mosquito control service requests. The health and safety of the citizens we serve and of our employees is paramount during the COVID-19 pandemic. To protect everyone, we have implemented the following measures to promote social distancing and to adhere to Center for Disease Control and Prevention (CDC) recommendations and state guidance:
To protect everyone and adhere to social distancing guidelines, please stay at least 6 feet away from Mosquito Control employees treating for mosquitoes.
Public Health and the Mosquito Control District work together to control mosquitos in Clark County. District activities are guided by the work plan adopted by the Mosquito Control Board of Trustees to address mosquito nuisance abatement and threats of West Nile Virus.
The morning application was cancelled
The evening application was cancelled.
The morning application for July 18th was cancelled.
Note: Morning treatment operations in downtown Ridgefield were cancelled.
June 30 locations June 29 locations - cancelled June 28 locations June 27 locations June 23 locations June 22 locations June 21 locations June 21 locations June 20 locations June 16 locations June 9 locations June 9 locations June 9 locations June 8 locations
May 24, 2022 locations May 23, 2022 locations May 23, 2022 locations May 17, 2022 locations May 17, 2022 locations May 16, 2022 locations
August 25, 2021 ground adulticide treatment - *CANCELED
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