# West Nile virus mosquito control efforts in the US

> Live situation record from CLSTR: https://clstr.news/situations/west-nile-virus-mosquito-control-efforts-in-the-us
> Updated: 2026-09-08T18:40:01.000Z. Sources: 4. Developments: 3.

Public health officials across several U.S. states have initiated mosquito control and spraying operations following the detection of West Nile virus in mosquito populations.

In mid-August, New Jersey authorities scheduled treatments in Warren and Monmouth counties after identifying the virus in mosquito samples, including those that had bitten humans. Concurrently, the Coachella Valley Mosquito and Vector Control District announced aerial spraying in North Shore, California, to address elevated levels of West Nile virus activity.

By early September, mosquito control efforts expanded to include western Umatilla County, Oregon, where aerial and truck-mounted spraying was planned following positive virus detections in several areas. Additionally, Camden County, New Jersey, scheduled ultra-low-volume spraying across multiple municipalities to mitigate health risks.

## Timeline

### 2026-09-08: Mosquito control spraying scheduled in Oregon and New Jersey

Mosquito control districts in Oregon and New Jersey are initiating spraying operations following West Nile virus detections and to manage local mosquito populations.

2 sources. https://clstr.news/cluster/mosquito-control-spraying-scheduled-in-oregon-and-new-jersey

### 2026-08-19: North Shore mosquito spraying scheduled to combat West Nile virus

The Coachella Valley Mosquito and Vector Control District will perform aerial spraying in North Shore, California, from Thursday to Sunday to combat elevated West Nile virus activity.

2 sources. https://clstr.news/cluster/north-shore-mosquito-spraying-scheduled-to-combat-west-nile-virus

### 2026-08-10: New Jersey mosquito spraying scheduled following West Nile virus detection

New Jersey officials are conducting mosquito spraying in Warren County and Howell following the detection of West Nile virus in local mosquito populations.

2 sources. https://clstr.news/cluster/new-jersey-mosquito-spraying-scheduled-following-west-nile-virus-detection

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Cite as: West Nile virus mosquito control efforts in the US. CLSTR, https://clstr.news/situations/west-nile-virus-mosquito-control-efforts-in-the-us