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Veterans Day Office Closure

Our office will be closed Wednesday, November 11, 2026, in observance of Veterans Day.

Regular office hours will resume Thursday, November 12.

Dedicated to Protecting Public Health Through Science and Service

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Mosquito Information

Learn about mosquito species, lifecylce, and prevention

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Board Agenda

Access meeting schedules, minutes and agendas

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Service Requests

Submit a request for inspection 

Read Our Newest Paper!

Weekly Mosquito Testing Results

West Nile Virus Update - Week of November 9th

West Nile Virus Update: One (1) positive mosquito sample was found in Chino. Wear repellent outdoors, dump and drain standing water, and call us for mosquito concerns.

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VIRTUAL VECTOR VISITS!

Send us your backyard pics and receive personalized instructions from our professional staff in the app!

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District Updates & Latest News

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Mosquito Prevention Tips

Learn how you can prevent mosquitoes in your home every season!

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Learn More About Our Services

Find about new updates regarding mosquitoes in your area!

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Learn More About S.I.T. Program

Heard about Sterile Insect Technique? Learn more about our program here!

Mosquito Prevention Checklist

Daily: Wear repellent outdoors. Use DEET, Picaridin, Oil of Lemon Eucalyptus, or IR3535.

Weekly: Scrub outdoor plant saucers. Dump out any standing water.

Weekly: Scrub indoor plant saucers. Empty all plates holding water.

Weekly: Check indoor decorative vases. Dump water or add rocks to displace it.

Weekly: Clear out yard drains. Add pea gravel or drill holes in boxes.

Weekly: Sweep sidewalk gutters. Keep the concrete clear and dry.​

Monthly: Inspect window and door screens. Fix holes, tears, and loose gaps.

After Rain: Check rain gutters, clear blockages and scrub to remove any eggs

Check Yearly: Consider putting mosquitofish in ponds, horse water troughs, or other permanent water sources.

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