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Tap water quality report

Plymouth, MN

EPA monitoring detected 17 contaminants across the 1 water supplier serving Plymouth. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
76,546
people served
17
contaminants found
Minnesota rankings Lead in Minnesota PFAS in Minnesota

What was found in Plymouth's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Copper
1285.5 µg/L 99%
of the EPA limit 1300 µg/L
Main supplier: Plymouth · 76,546 people · 2018
1/1 SYR4
Fluoride
1200 µg/L 30%
of the EPA limit 4000 µg/L
Main supplier: Plymouth · 76,546 people · 2019
1/1 SYR4
Barium
129.55 µg/L 6.5%
of the EPA limit 2000 µg/L
Main supplier: Plymouth · 76,546 people · 2012
1/1 SYR4
Chloroform
34.6 µg/L
No EPA limit set
Main supplier: Plymouth · 76,546 people · 2019
1/1 SYR4
Lithium
13.6 µg/L
No EPA limit set
Main supplier: Plymouth · 76,546 people · 2023
1/1 UCMR-5
Dichloroacetic Acid
11.1 µg/L
No EPA limit set
Main supplier: Plymouth · 76,546 people · 2019
1/1 SYR4
Bromodichloromethane
10 µg/L
No EPA limit set
Main supplier: Plymouth · 76,546 people · 2019
1/1 SYR4
Trichloroacetic Acid
9.905 µg/L
No EPA limit set
Main supplier: Plymouth · 76,546 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
8.21 pCi/L 55%
of the EPA limit 15 pCi/L
Main supplier: Plymouth · 76,546 people · 2018
1/1 SYR4
Lead
5.64 µg/L 38%
of the EPA limit 15 µg/L
Main supplier: Plymouth · 76,546 people · 2018
1/1 SYR4
Dibromochloromethane
3.8 µg/L
No EPA limit set
Main supplier: Plymouth · 76,546 people · 2019
1/1 SYR4
Arsenic
1.5595 µg/L 16%
of the EPA limit 10 µg/L
Main supplier: Plymouth · 76,546 people · 2012
1/1 SYR4
Dibromoacetic Acid
1.18 µg/L
No EPA limit set
Main supplier: Plymouth · 76,546 people · 2019
1/1 SYR4
Bromoform
0.5950 µg/L
No EPA limit set
Main supplier: Plymouth · 76,546 people · 2019
1/1 SYR4
Chromium
0.2100 µg/L 0.2%
of the EPA limit 100 µg/L
Main supplier: Plymouth · 76,546 people · 2013
1/1 SYR4
Pfba
0.0191 µg/L
No EPA limit set
Main supplier: Plymouth · 76,546 people · 2023
1/1 UCMR-5
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
Main supplier: Plymouth · 76,546 people · 2024
1/1 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Plymouth

SupplierPopulation served
Plymouth 76,546

Frequently asked questions about Plymouth tap water

Is Plymouth tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Plymouth. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Plymouth?

1 public water supplier report drinking-water monitoring for Plymouth, Minnesota to the EPA. Each is listed above with its population served.

What contaminants are in Plymouth's water?

The contaminants EPA monitoring detected in Plymouth include Copper, Fluoride, Barium, Chloroform, Lithium. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.