West Nile virus Location Map in a New Windowclick here

Please Note:

Benton County Mosquito Control District (BCMC) routinely traps, identifies (species, population levels) and tests mosquitoes for the presence of West Nile virus (WNv).

If we have a confirmation of WNv (in-house testing of mosquitoes, reports from veterinarians or doctors, etc), the section (1 square mile) will be turned to a red color.

1) The red-colored sections may represent WNv positive mosquitoes, birds, horses and/or humans.
2) BCMC attempts to collect from a representative area of the District, but we do not and cannot collect mosquitoes from all locations so a non-colored section does NOT necessarily mean that WNv is not present.
3) Once a section has been turned red, it will stay so for the remainder of that season.


For more information on how the District performs its monitoring and testing of mosquitoes, please visit our testing page. The District only monitors and tests the mosquito population within the District, if you want information about humans, horses/other mammals, birds and mosquitoes for the entire state, please click here.