"The public is listening, and that's why the numbers have plateaued", he said.
Limit outdoor activities at dusk and dawn, when mosquitoes that carry West Nile virus are most active.
Two sites in Lebanon County - North Lebanon and West Cornwall townships - also had infected mosquitoes.
Scott said it is important to take preventative measures. Do not use bug spray on babies under 1 year of age. Generally, mosquito season runs from late April until mid-October.
"If you have questions or need help with a mosquito problem, contact the Lake County Vector Control District at www.LCVCD.org or 707-263-4770", she added.More news: Mark Ruffalo Reveals 'A Standalone Hulk Movie Will Never Happen'
Mosquitoes are trapped weekly for testing, and positive test results trigger additional trapping. The annoying pests may leave behind more than itchy skin. She urges people to wear mosquito repellent and to dump out any standing water on your property.
Mosquitos have been trapped in counties to the south - Mesa and Delta - and across the continental divide in the Eastern Slope communities of Boulder, Larimer, Jefferson and Weld counties.
Remove any water from unused swimming pools, wading pools, boats, planters, trash and recycling bins, tires, and anything else that collects water, and cover them.
This is the last I've got in the store.
"With the mosquitoes getting progressively worse this summer we've sold a lot of the permetherin as well as any of the brands with insect repellent apparel in there", said Smith.