The Cowlitz County Mosquito Control District works from March through October to control mosquitoes in Cowlitz County. Any resident of Cowlitz County can contact the Mosquito Control District to request help with mosquito problems. There is no charge for this service, they are funded by an assessment on all property within the County.
For help, call the Mosquito Hotline at 360-425-5658 or their main office at 360-423-5311.