U.S. cities whose utilities' results were above an EPA level

U.S. cities whose utilities' PFOA or PFOS results averaged above 4.0 ppt, the level EPA set in 2024 (UCMR 5)

These are 337 of the 656 utilities whose PFOA or PFOS results averaged above 4.0 ppt in EPA's UCMR 5 data. The other 319 serve places that don't have a ScoreYourWater page yet.

These utilities' PFOA or PFOS results averaged above 4.0 ppt, the level EPA set in 2024, not yet enforceable (water systems must meet it by April 2029; EPA has proposed allowing until 2031). Non-detects count as zero in the average.

These are monitoring results compared with a level, not violations.

Sorted alphabetically by state, then city.

Not in this list: 72 utilities without UCMR 5 results. Missing data isn't a good result.

U.S. cities whose utilities' lead 90th percentile was above EPA's action level (15 ppb)

These are 15 of the 419 utilities whose lead 90th percentile since July 2021 was above 15 ppb in EPA's SDWIS data. The other 402 serve places that don't have a ScoreYourWater page yet.

Being above an action level isn't a violation; it requires steps like treatment and public education. EPA's lead action level is scheduled to become 10 ppb on Nov. 1, 2027; until then it is 15 ppb.

These are monitoring results compared with a level, not violations.

Sorted alphabetically by state, then city.

2 more utilities above 100 ppb, not named pending utility confirmation.

Not in this list: 80 utilities without a lead 90th percentile since July 2021.

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• Florida ZIP codes