Summer places unique pressures on US water systems. Higher temperatures increase demand, drought conditions in many states reduce reservoir and aquifer levels, and heat can accelerate bacterial growth in distribution systems with lower-than-normal flow. At the same time, the EPA’s new PFAS regulations — with compliance deadlines approaching — are bringing fresh scrutiny to water utilities across the country. This summer water safety guide covers everything US residents need to know for 2026.
Track all active boil water notices in real time on our live US boil water notice tracker and stay current with our water alert news section for the latest on US water quality events.
PFAS in Summer 2026 — Where Things Stand
The EPA’s enforceable PFAS maximum contaminant levels (MCLs) — set at 4 parts per trillion for PFOA and PFOS — represent a landmark shift in US drinking water regulation. Utilities have until 2031 to achieve compliance. This summer, UCMR 5 monitoring data continues to reveal the scale of PFAS presence in water systems that were previously untested, and residents in affected areas are becoming increasingly aware of what their tap water may contain between boil water events.
Drought and Water Quality
Drought conditions concentrate contaminants in reduced water volumes, place greater treatment demands on utilities, and can draw water from sources that are normally supplementary and less well-treated. Western states in particular face ongoing drought pressure that affects water quality and availability simultaneously. Check our state pages for water quality information specific to your area.
Standard carbon filters do not remove PFAS. Only reverse osmosis systems certified to NSF/ANSI Standard 58 are confirmed to remove PFAS compounds effectively. See our water filter guide for certified options.
Track all current US boil water notices on our live US boil water notice tracker. For the latest water quality news, see our water alert news section.