Tap Water Results

Minnesota tap water quality

998 community water systems serving 4.7 million people.

Data: U.S. EPA · How we read the data · How we check it

10
systems with PFAS above a federal limit
270,387
people served by them
197
systems EPA tested for PFAS
7
systems above the lead action level

PFAS: EPA's 2023–2025 testing. Lead: results from the last five years. 1 more systems have no recent lead results in EPA's database.

Water systems with PFAS above the federal limit

Based on EPA's UCMR 5 results (2023–2025) compared to the April 2024 limits, the way EPA compares them. Systems have until 2029 to comply. Largest first.

Minnesota PFAS report: chart, rankings and data to download →

Minnesota's own PFAS limits

Health-based guidance value (HRL/HBV) (not enforceable): PFOA 0.0079 ppt, PFOS 2.3 ppt, PFHxS 10 ppt, PFBS 100 ppt, PFHxA 200 ppt, PFBA 7000 ppt.

Lowest MDH values (PFOA cancer-based, noncancer 0.24). For PFHxS, MDH recommends EPA's 10 ng/L over its 47 ng/L HRL (June 2025).

Source: MDH Human Health-Based Water Guidance Table, checked 2026-11-14. Utility pages compare each system's EPA results with these limits. State compliance is judged on the state's own sampling.

Largest water systems in Minnesota

Minnesota cities and towns

Most health-based violations since 2016

All Minnesota utilities on this site

Every Minnesota system serving 50,000+ people or with PFAS above a federal limit, A to Z. Download all 998 systems as CSV.

Questions

Does Minnesota tap water have PFAS?

EPA tested 197 community water systems in Minnesota for 29 PFAS between 2023 and 2025. 23 had at least one regulated PFAS detected, and 10 had an entry-point average above a 2024 federal limit. Those 10 systems serve about 270,387 people (6% of people on community water in Minnesota). Systems have until 2029 to meet the limits.

How many Minnesota water systems have violations?

114 systems in Minnesota had at least one health-based violation since 2016 (538 violations in total). 88 violations are currently listed as unaddressed.

Which Minnesota water systems are over the lead action level?

7 systems had a lead 90th percentile above the 15 ppb action level in their most recent results from the last five years. Another 1 system has no lead results in EPA's database from the last five years. Lead depends on each home's pipes, so a test of your own tap is the only way to know your level.

Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.