Water Quality Report · Updated October 07, 2026
Plymouth
Plymouth delivers tap water graded D (63/100) by TapWaterSafety.org. The utility serves approximately 76,546 residents in Plymouth, Minnesota using groundwater. The most significant water quality concerns are: PFAS contamination; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. For questions, the utility can be reached at 7635095080.
Is Plymouth tap water safe to drink?
Plymouth delivers tap water that earns a grade of D (63/100) from TapWaterSafety.org — a below-average rating, with multiple concerns including pfas contamination.
The utility serves 76,546 residents in Plymouth, drawing from groundwater.
Public testing data identifies 14 contaminants in this water above EWG's health-based guidelines, including: Perfluorohexane sulfonate (PFHXS), Haloacetic acids (HAA9), Total trihalomethanes (TTHMs), Haloacetic acids (HAA5), Bromodichloromethane, Trichloroacetic acid, Chloroform, Dichloroacetic acid, Radium, combined (-226 and -228), Dibromochloromethane, Perfluorooctanoic acid (PFOA), Dibromoacetic acid, Chromium (hexavalent), Perfluorooctane sulfonate (PFOS). For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for Plymouth (system ID MN1270044) 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.
Quick actions for Plymouth residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for Plymouth.
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.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 1.35 ppt, 1348x above the EWG health guideline of 0.001 ppt.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 27.9 ppb, 466x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 30.7 ppb, 205x above the EWG health guideline of 0.15 ppb.
Contact Plymouth
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for Plymouth
Filters matched to the specific contaminants in this 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.
Score breakdown
This utility's overall score of 63/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). 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 |
|---|---|---|---|---|---|---|---|---|
| Perfluorohexane sulfonate (PFHXS) PFAS |
1.35 ppt | 0.001 | 10.0 | — | — | — | — | 1348× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
27.9 ppb | 0.06 | — | — | — | — | — | 466× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
30.7 ppb | 0.15 | 80.0 | 100 | — | — | — | 205× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
16.8 ppb | 0.1 | 60.0 | 60 | — | — | — | 168× over |
| Bromodichloromethane Disinfection byproduct |
8.02 ppb | 0.06 | — | — | — | — | — | 134× over |
| Trichloroacetic acid Disinfection byproduct |
8.37 ppb | 0.1 | — | — | — | — | — | 84× over |
| Chloroform Disinfection byproduct |
20.0 ppb | 0.4 | — | — | — | — | — | 50× over |
| Dichloroacetic acid Disinfection byproduct |
8.2 ppb | 0.2 | — | — | — | — | — | 41× over |
| Radium, combined (-226 and -228) Radiological |
2.05 pCi/L | 0.05 | 5.0 | — | — | — | — | 41× over |
| Dibromochloromethane Disinfection byproduct |
2.7 ppb | 0.1 | — | — | — | — | — | 27× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.705 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 7.8× over |
| Dibromoacetic acid Disinfection byproduct |
0.183 ppb | 0.03 | — | — | — | — | — | 6.1× over |
| Chromium (hexavalent) Heavy metal |
0.06 ppb | 0.02 | — | — | — | — | — | 3.0× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
0.692 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 2.3× over |
| Chlorate Disinfection byproduct |
206.5 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
143.5 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Perfluoropentane sulfonic acid (PFPeS) PFAS |
0.145 ppt | 1.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
5.83 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Molybdenum Other |
1.78 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
9.42 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.351 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.323 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.437 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.251 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
0.098 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.619 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
6.7 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 (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
Plymouth service area
This water system serves 1 community in Hennepin County, Minnesota. Click any city for its dedicated tap water quality page.
Find the right filter for Plymouth water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.