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Health advisories issued for Chesterfield and Island Park reservoirs in eastern Idaho

The Department of Health and Welfare has issued health advisories for Chesterfield Reservoir in Caribou County and Island Park Reservoir in Fremont County due to recent samples showing high amounts of toxin-producing cyanobacteria. People are advised to avoid swimming or contact with the water and explicitly warned not to drink or cook with the water, as boiling or filtering does not remove the toxins. Update (Atlanta News First, 08.10.2026, 07:25): The advisory, issued by the Jackson County Water and Sewerage Authority, requires boiling water for drinking, cooking, ice making, and brushing teeth. It remains in effect until further notice, with water quality test results not expected until Thursday. Update (FOX 5 Atlanta, 08.10.2026, 07:25): The advisory, issued Wednesday at 12 p.m. for thousands of residents in Jackson County, the Town of Braselton, and the City of Hoschton, is due to a pump failure at Bear Creek Reservoir and potential microbial contamination, expected to last through Thursday afternoon. Update (Yahoo News, 08.10.2026, 07:50): A program in Bee County, Texas, for private well owners reveals 50 to 60 percent of samples typically contain coliform bacteria. Well disinfection is recommended for private wells found to have E. coli. All-clear (Yahoo News, 08.10.2026, 23:35): Boil water advisories for Jackson County, Braselton, and Hoschton, Georgia, have been lifted as of Thursday afternoon after water quality testing confirmed the water is safe and free of contaminants. Residents can now resume normal water use without needing to flush lines. Update (Cleveland19.com (WOIO), 09.10.2026, 00:35): A new boil water advisory was issued for approximately 232 customers and Hoban High School in Akron, affecting the area of 5th Avenue, Whitney Avenue, Baird Street, and Bertha Avenue. This follows a 12-inch water main burst on S. Arlington between 6th and 7th Avenues around 6:30 a.m. on Thursday. Update (Village of Bald Head Island, 09.10.2026, 10:10): Brunswick County Public Utilities implemented its annual water disinfection change from chloramines to chlorine on October 1. The Village of Bald Head Island Utilities will follow the week of October 12. Customers may notice temporary water discoloration, which can be addressed by running outdoor spigots. Update (3NEWS, 09.10.2026, 14:00): Specific testing found 28 of 70 samples positive for coliform bacteria and eight for E. coli. Critically, some samples also contained elevated nitrate levels exceeding federal limits. Residents are advised to treat water before drinking, use alternative sources, or consider reverse osmosis filtration. Update (WJCL, 10.10.2026, 00:20): Elevated lead levels were reported in Liberty County schools, originating from Midway's water supply. Update (WEAR, 10.10.2026, 09:05): Emerald Coast Utilities Authority (ECUA) issued a systemwide precautionary boil water notice for Escambia County, Florida, effective immediately due to Hurricane Isaias impacts. Tap water must be boiled for at least one minute before use for drinking, cooking, making ice, brushing teeth, washing dishes, or preparing food, or commercially bottled water should be used. All-clear (klax-tv.com, 10.10.2026, 11:45): A boil water advisory for customers along Princeton Road in Louisiana has been lifted following resolution of the water supply issue. Update (First Alert 4, 10.10.2026, 13:20): Residents across West St. Louis County, including Ballwin, Manchester, and Kirkwood, are experiencing yellow-tinted tap water since Wednesday night due to heavy rains and changes in source water characteristics. Missouri American Water states the water is safe to drink and use, with no boil advisory in effect, but has no timeline for the water to return to normal. All-clear (kait8.com, 10.10.2026, 19:30): Boil orders for Jackson County were lifted as of October 9, 2026.

Location

Caribou County, Fremont County, Eastern Idaho

Country

🇺🇸 USA

Start

Unknown

End

30/09/2026, 02:00

Event type

Microbiological, Chemical contamination, Limit exceeded, Boil water advisory

Status

Lifted

Region

Eastern Idaho

Last updated

10/10/2026, 19:30