Minnesota Water Quality: 93 Cities Ranked by the Records

PurityMap ranks 93 cities in Minnesota by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Saint Cloud's main water system: Saint Cloud · PWSID MN1730027 · Purity Score 100 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

12 cities of 93 had at least one regulated PFAS (PFOA, PFOS or PFHxS) measured above the 2024 federal limit in EPA's UCMR 5 testing, including Hastings (PFOA 23.7 ng/L), Woodbury (PFOA 17.1 ng/L), Sauk Rapids (PFHxS 34.2 ng/L). PFAS were detected at any level in 58.

Utilities report lead as a 90th-percentile result from home taps. 61 of 93 Minnesota cities reported a value above zero, and 1 city was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

6 cities in Minnesota have a health-based violation in the federal SDWIS record within about the last ten years. Each city report lists the contaminant, year and whether it was resolved.

Hardness is published in utility water-quality reports for 1 Minnesota city on record; the hardest is Minneapolis at 5.7 grains per gallon. Hardness affects scale and appliances; it is not a health finding.