Tap Water Quality Report
Tap water quality in Minnetonka, Minnesota
Tap water in Minnetonka, Minnesota receives a grade of D (67/100) from TapWaterSafety.org. It's served by Minnetonka. The most significant water quality concerns are: PFAS contamination; Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Perfluorohexane sulfonate (PFHXS) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in Minnetonka's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving Minnetonka.
PFAS contamination
Severe concernPerfluorooctane sulfonate (PFOS), Perfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 15.1 ppb, 252x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 26.4 ppb, 176x above the EWG health guideline of 0.15 ppb.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 0.138 ppt, 138x above the EWG health guideline of 0.001 ppt.
EPA compliance record
Official U.S. EPA records for Minnetonka (system ID MN1270031) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for Minnetonka
Filters matched to the specific contaminants in Minnetonka's water supply.
Filter certified for PFOA/PFOS (NSF/ANSI 53 or 58)
$180-$750Reverse osmosis and some carbon block filters reduce PFAS. Look for certification to NSF/ANSI 53 or 58 for PFOA/PFOS.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in Minnetonka's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
15.1 ppb | 0.06 | — | — | — | — | — | 252× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
26.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 176× over |
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.138 ppt | 0.001 | 10.0 | — | — | — | — | 138× over |
| Bromodichloromethane Disinfection byproduct |
6.45 ppb | 0.06 | — | — | — | — | — | 108× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
8.9 ppb | 0.1 | 60.0 | 60 | — | — | — | 89× over |
| Trichloroacetic acid Disinfection byproduct |
5.52 ppb | 0.1 | — | — | — | — | — | 55× over |
| Radium, combined (-226 and -228) Radiological |
2.53 pCi/L | 0.05 | 5.0 | — | — | — | — | 51× over |
| Chloroform Disinfection byproduct |
17.7 ppb | 0.4 | — | — | — | — | — | 44× over |
| Dibromochloromethane Disinfection byproduct |
2.23 ppb | 0.1 | — | — | — | — | — | 22× over |
| Dichloroacetic acid Disinfection byproduct |
3.38 ppb | 0.2 | — | — | — | — | — | 17× over |
| Chlorate Disinfection byproduct |
143.9 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Perfluorooctanoic acid (PFOA) PFAS |
0.044 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | Below guideline |
| Chromium (hexavalent) Heavy metal |
0.00527 ppb | 0.02 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
138.0 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Manganese Heavy metal |
15.2 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Perfluorooctane sulfonate (PFOS) PFAS |
0.031 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | Below guideline |
| Trichloroethylene Volatile organic compound |
0.0164 ppb | 0.4 | 5.0 | 10 | 20 | 1.7 | — | Below guideline |
| Molybdenum Other |
1.47 ppb | 40.0 | — | — | — | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.00844 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
3.82 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.205 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.046 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.023 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.031 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Xylenes (total) Volatile organic compound |
0.0125 ppb | 1800.0 | 10000.0 | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.0678 ppb | — | — | — | — | — | — | Below guideline |
| cis-1,2-Dichloroethylene Volatile organic compound |
0.0418 ppb | — | 70.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.685 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
1.31 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from Minnetonka.