Hennepin County Water Quality: 7 Cities Ranked by the Records
Hennepin County, Minnesota: 7 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.
Highest result for each contaminant
One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.
LithiumDetected in 3 systems of 7 tested10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest20.4 µg/L
- Rogers20.4 µg/LSample date: 2025-04-09 to 2025-11-20
- Edina17.1 µg/LSample date: 2023-03-21 to 2023-09-28
- Minnetonka10.7 µg/LSample date: 2023-08-01 to 2024-04-30
- ChamplinNot detected · below 9.0 µg/L lab reporting limitSample date: 2024-04-01 to 2024-10-16
- Eden PrairieNot detected · below 9.0 µg/L lab reporting limitSample date: 2023-05-08 to 2023-12-05
- HopkinsNot detected · below 9.0 µg/L lab reporting limitSample date: 2023-08-09 to 2024-03-28
- MinneapolisNot detected · below 9.0 µg/L lab reporting limitSample date: 2023-05-03 to 2024-04-25
Copper (90th percentile)Detected in 4 systems1.3 mg/L federal action level · US EPAHighest1.73 mg/L
- Edina1.73 mg/LMonitoring period: 2014–2016
- Hopkins1.45 mg/LMonitoring period: 2017–2019
- Minnetonka1.4 mg/LMonitoring period: 2017–2019
- Minneapolis0.07 mg/LReporting year: 2024
Total trihalomethanes (TTHM)Detected in 1 system80 ppb federal MCL · US EPAHighest36.8 ppb
- Minneapolis36.8 ppbReporting year: 2024
Haloacetic acids (HAA5)Detected in 1 system60 ppb federal MCL · US EPAHighest23.6 ppb
- Minneapolis23.6 ppbReporting year: 2024
FluorideDetected in 1 system4.0 mg/L · US EPAHighest0.67 mg/L
- Minneapolis0.67 mg/LReporting year: 2024
Lead (90th percentile)Detected in 2 systems of 7 tested15 µg/L federal action level · US EPAHighest2 µg/L
- Minneapolis2 µg/LMonitoring period: 2022–2024
- Hopkins1 µg/LMonitoring period: 2023–2023
- ChamplinNot detectedMonitoring period: 2023–2025
- Eden PrairieNot detectedMonitoring period: 2023–2025
- EdinaNot detectedMonitoring period: 2022–2024
- MinnetonkaNot detectedMonitoring period: 2023–2023
- RogersNot detectedMonitoring period: 2021–2023
NitrateDetected in 1 system10 mg/L · US EPAHighest0.67 mg/L
- Minneapolis0.67 mg/LReporting year: 2024
Water hardnessDetected in 1 systemAesthetic, no federal health limit · USGSHighest5.7 gpg
- Minneapolis5.7 gpgReporting year: 2024
1 more contaminant detectedShow
Perfluorobutanoic acid (PFBA)Detected in 6 systems of 7 testedNo federal or state limit; shown for transparencyHighest25.3 ng/L
- Edina25.3 ng/LSample date: 2023-03-21 to 2023-09-28
- Minnetonka16.6 ng/LSample date: 2023-08-01 to 2024-10-16
- Eden Prairie12.7 ng/LSample date: 2023-05-08 to 2023-12-05
- Minneapolis12 ng/LSample date: 2023-05-03 to 2024-07-16
- Rogers8.6 ng/LSample date: 2025-04-09 to 2025-11-20
- Hopkins7.6 ng/LSample date: 2024-03-28 to 2024-10-07
- ChamplinNot detected · below 5.0 ng/L lab reporting limitSample date: 2024-04-01 to 2024-10-16
28 PFAS tested, none detected in any systemShow
Tested in these 7 systems: Champlin, Eden Prairie, Edina, Hopkins, Minneapolis, Minnetonka, Rogers
- 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
- 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
- 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
- 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
- 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
- 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
- Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
- N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
- N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
- Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
- Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
- Perfluoro-3-methoxypropanoic acid (PFMPA)
- Perfluoro-4-methoxybutanoic acid (PFMBA)
- Perfluorobutanesulfonic acid (PFBS)
- Perfluorodecanoic acid (PFDA)
- Perfluorododecanoic acid (PFDoA)
- Perfluoroheptanesulfonic acid (PFHpS)
- Perfluoroheptanoic acid (PFHpA)
- Perfluorohexanesulfonic acid (PFHxS)
- Perfluorohexanoic acid (PFHxA)
- Perfluorononanoic acid (PFNA)
- Perfluorooctanesulfonic acid (PFOS)
- Perfluorooctanoic acid (PFOA)
- Perfluoropentanesulfonic acid (PFPeS)
- Perfluoropentanoic acid (PFPeA)
- Perfluorotetradecanoic acid (PFTA)
- Perfluorotridecanoic acid (PFTrDA)
- Perfluoroundecanoic acid (PFUnA)
Cities ranked by the records
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Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.
0of 7 cities above the 15 µg/L action level
Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.
Lead in Minnesota1city reports hardness · Minneapolis, 5.7 gpg
None above 7 gpg, the USGS threshold for hard water. An aesthetic measure with no federal health limit.
Hard water explainedLargest water systems
- MinneapolisMinneapolis · MN1270024425,300 served
- Eden PrairieEden Prairie · MN127001063,726 served
- MinnetonkaMinnetonka · MN127003154,474 served
- EdinaEdina · MN127001153,494 served
- ChamplinChamplin · MN127000623,919 served
- HopkinsHopkins · MN127001619,462 served
- RogersRogers · MN127004714,430 served
Frequently asked
How does Hennepin County tap water compare across cities?
PurityMap ranks 7 cities in Hennepin County 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 Eden Prairie's main water system: Eden Prairie · PWSID MN1270010 · 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.
How many Hennepin County cities had a PFAS sample above a 2024 EPA limit?
None of the 7 Hennepin County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing. PFAS were detected below the limit in 6.
Is there lead in Hennepin County tap water?
Utilities report lead as a 90th-percentile result from home taps. 2 of 7 Hennepin County cities reported a value above zero, and none 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.
Does Hennepin County have hard water?
Hardness is published in utility water-quality reports for 1 Hennepin County city on record; the hardest is Minneapolis at 5.7 grains per gallon. Hardness affects scale and appliances; it is not a health finding.
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