A mosquito trap at Chastain Memorial Park in Buckhead has tested positive for West Nile virus, prompting the City of Atlanta to order immediate spraying across the sprawling 268-acre park. Officials have not stated whether any human cases have been reported in connection with the finding, and officials have not said how long the retesting process will take.
The Chastain Park Conservancy announced that the City of Atlanta notified it of the positive finding, issuing a public service announcement detailing the notification, according to FOX 5 Atlanta. Positive mosquito pools had previously been identified in the same area of the park, the station reports. City officials plan to post warning signs around the park detailing the findings and the spraying activities underway.
Vector Disease Control International, the city's contracted mosquito control vendor, is scheduled to treat the area Thursday night and Friday, weather permitting, targeting a quarter-mile radius around the infected trap. Mosquito control crews will retest the location once spraying wraps up. In the meantime, park visitors are being encouraged to take standard precautions against mosquito bites while using Chastain's walking trails, golf course, ball fields, and outdoor amphitheater.
A Park Built for Crowds — and Mosquitoes
Chastain Memorial Park is Atlanta's second-largest city park, drawing more than 3.2 million visitors a year, according to Trees Atlanta. Trees Atlanta mentions Powers Ferry Road and wooded terrain in describing the park.
The Chastain finding is not an isolated event. Metro Atlanta health officials had already detected West Nile virus mosquito samples in Grant Park on July 8, and in seven DeKalb County surveillance traps by mid-August, the station's report notes. The report describes surveillance traps used to monitor viral presence in the area.
Nearby Roswell Trap Retests Clean
Elsewhere in Fulton County, the response to a similar detection offers a preview of what may come at Chastain. Vector Disease Control International has treated a quarter-mile radius around a positive trap site.
South Fulton has handled positive traps differently depending on the location. The city closed Old National Park indefinitely on August 12 after a positive test, but kept Welcome All Park open during spraying and retesting following an August 26 finding there, as Hoodline previously reported. Atlanta, for its part, has announced spraying and retesting at Chastain Park.
Human Cases Remain Rare Despite Widespread Detections
Despite the string of positive mosquito traps across metro Atlanta this summer, human infections have stayed uncommon. As of September 9, public health authorities had confirmed four human West Nile virus cases in Georgia for 2026, including two in Chatham County and single cases in Fulton and Muscogee counties, according to Patch. The cited reports also discuss West Nile virus activity in Georgia and nationally in 2025. Mosquito activity and viral transmission in Georgia typically peak between August and September.
Nationally, the CDC's latest report, as cited by Patch on September 9, listed 407 total human cases and four Georgia cases. Favorable weather conditions contributed to one of the earliest starts to the U.S. West Nile virus season since 2004, per the CDC. Public health data indicates roughly 80% of infected people show no symptoms at all, about 20% develop mild flu-like illness, and fewer than 1% progress to severe neuroinvasive disease, which can cause high fever, neck stiffness, disorientation, coma, or paralysis, most commonly in older adults.
Prevention Gaps Persist Even as Awareness Grows
The Fulton County Board of Health continues to promote its “Tip and Toss” campaign, reminding residents to remove standing water from containers, gutters, and flowerpots, according to The Southerner Online. Environmental health officials conduct localized outreach to homes near any site where a trap tests positive.
Prevention remains important. Health departments recommend EPA-registered insect repellent for effective protection against bites.
