November 22, 2016

Mr. Glenn Duncan, the Board President of the West Valley Mosquito and Vector Control District, is pleased to announce that the annexation of the City of Upland and sphere expansion to include San Antonio Heights and northern sphere of the City of Rancho Cucamonga into the district has been completed as of November 18, 2016. 

For any of your vector issues, concerns, or questions, please call the District at 909-635-0307 Mon.-Fri. from 7:30 a.m. until 3:30 p.m., or visit the website at and file a Service Request online.  We are here to help and assist you in any way we can.



MAY 19, 2017

First Indication of West Nile Virus Activity in West Valley: Mosquito Sample Positive for the Virus

May 19 – A mosquito sample collected from Upland by the West Valley Mosquito and Vector Control District has tested positive for West Nile Virus. This sample was collected near 15th Street and Euclid Avenue. This is the first mosquito sample to test positive in San Bernardino County.

Statewide, there has already been one confirmed human case of West Nile Virus in Kings County, and six additional counties have reported positive indicators of West Nile Virus (dead birds or mosquito samples). It is important for residents to dump all standing water found in items such as birdbaths, trash cans, and flowerpots, to frequently change the water in pet’s dishes and to ensure pools and spas are properly maintained.

In addition, residents are encouraged to ensure that window screens are in good repair, and to use an effective mosquito repellent when outdoors. The Centers for Disease Control recommends using a repellent containing Picaridin, DEET, Oil of Lemon Eucalyptus, or IR3535.

Residents can assist by reporting dead birds to the WNV hotline at (877) 968-2473 or online at

Residents are also urged to report green pools, standing water, or mosquito problems to the District at 909-635-0307 or online at

NOVEMBER 4, 2016

Late Season Positive Mosquito Samples, West Nile Virus Returns

The West Valley Mosquito and Vector Control District’s (WVMVCD) in-house testing laboratories have discovered that 2 mosquito samples from the city of Ontario have tested positive for West Nile virus. The District has been continuously collecting mosquitoes within its jurisdiction, but saw a drop in positive samples beginning week 36 (September) through early November (week 42). But this week’s West Nile virus positive mosquito samples have been the first in six weeks. President of the Board of Trustees, Mr. Glenn Duncan, said, “This week’s resurgence in the detection of West Nile virus just shows us that we must remain vigilant when it comes to vector-borne diseases. The weather that we love so much here in California is great at producing mosquitoes, and that weather can last well into the winter months!” The District wishes to remind residents that any standing water has the potential for breeding mosquitoes, all it takes is time. Be sure to remove standing water from around your property, even water in the saucers of potted plants can become mosquito nurseries. The WVMVCD asks that you call the District immediately if you have any areas of standing water such as gutters, unkempt swimming pools, etc. District Technicians can treat the water source to keep mosquitoes from emerging, giving residents time to get the water removed. If you are being bitten by mosquitoes during daytime hours, this could be an indication of an invasive Aedes mosquito infestation. To minimize all mosquito breeding, it is important to inspect your yard and surrounding areas, remove any standing water, and scrub containers (pots and vases both inside and outside the home) thoroughly to remove any possible eggs laid by Aedes mosquitoes. Remember, no water – no mosquitoes!

The District is a Public Health Agency and their mission is to provide help and protection against mosquitoes and other vector-borne diseases.

Visit or call 909-635-0307.