County Health Department Finds Season’s First West Nile-Positive Mosquito Pool In Haverstraw

ROCKLAND COUNTY, NY — County health officials have confirmed the first infected mosquito of the summer.

Rockland County has recorded its first mosquito pool to test positive for West Nile Virus this season, according to the Rockland County Department of Health. The New York State Department of Health confirmed the result from a group of mosquitoes collected in the Town of Haverstraw during the week of June 22 as part of the county's mosquito surveillance program.

The infected mosquitoes, identified as Culex pipiens-Cx. Restuans, were submitted for testing on June 29. The Health Department said 66 mosquito pools have been submitted for testing so far this year.

No human cases of West Nile Virus have been reported in Rockland this season. The most recent confirmed human case in the county was reported in 2025.

"Warmer weather brings increased mosquito activity and a greater risk of West Nile Virus," Rockland County Commissioner of Health Mary Leahy said. "Our team actively monitors and treats mosquito breeding areas throughout the county to help reduce mosquito populations and lower the risk of disease transmission."

With the Fourth of July holiday weekend approaching, the Health Department said many outdoor activities happen when mosquitoes are most active. The agency urged residents to take steps to prevent bites and reduce the risk of West Nile Virus while attending barbecues, watching fireworks, or spending time outside.

According to the Health Department, most mosquitoes do not carry West Nile Virus, but people can become sick if bitten by an infected mosquito. Adults age 50 and older and people with weakened immune systems are at higher risk for severe illness. Symptoms may include fever, headache, body aches, nausea, skin rash and swollen lymph glands. In rare cases, the virus can cause serious illnesses such as encephalitis or meningitis, according to the Health Department.

The Health Department also recommended long sleeves and pants, using repellent as directed, covering strollers with mosquito netting, avoiding peak mosquito hours at dusk and dawn, and keeping window and door screens in good condition.

The county said residents can help reduce mosquito populations by emptying containers that collect water, turning over outdoor items when not in use, and cleaning gutters. The Health Department also said unused swimming pools or hot tubs should be drained or treated, and rain barrels should be covered.

Residents can pick up Mosquito Dunks free of charge at the Health Department in Pomona by appointment only while supplies last. To arrange a pickup, residents can call 845-364-3173 or email this address.