Is Plymouth Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Hennepin

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MR	Monitoring	Archived	1991-10-01 → 1991-10-31
MR	Monitoring	Archived	1991-10-01 → 1991-10-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
Pfba	0.0191 µg/L	4/4	2023

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	1285.5 µg/L 99% of the EPA limit 1300 µg/L worst single sample: 1600 µg/L	90/90	SYR4	2012–2018
Lead	5.64 µg/L 38% of the EPA limit 15 µg/L worst single sample: 91.9 µg/L	57/90	SYR4	2012–2018
Chloroform	34.6 µg/L No EPA limit set worst single sample: 37 µg/L	45/45	SYR4	2012–2019
Bromodichloromethane	10 µg/L No EPA limit set worst single sample: 11 µg/L	43/45	SYR4	2012–2019
Dibromochloromethane	3.8 µg/L No EPA limit set worst single sample: 4.2 µg/L	41/45	SYR4	2012–2019
Dichloroacetic Acid	11.1 µg/L No EPA limit set worst single sample: 13 µg/L	40/40	SYR4	2012–2019
Trichloroacetic Acid	9.905 µg/L No EPA limit set worst single sample: 11 µg/L	40/40	SYR4	2012–2019
Fluoride	1200 µg/L 30% of the EPA limit 4000 µg/L worst single sample: 1300 µg/L	33/33	SYR4	2012–2019
Lead	0.0020 mg/L 13% of the EPA limit 0.0150 mg/L	15/15	LCR	2024
Dibromoacetic Acid	1.18 µg/L No EPA limit set worst single sample: 1.2 µg/L	5/40	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	8.21 pCi/L 55% of the EPA limit 15 pCi/L worst single sample: 8.3 pCi/L	3/4	SYR4	2012–2018
Arsenic	1.5595 µg/L 16% of the EPA limit 10 µg/L worst single sample: 1.58 µg/L	2/2	SYR4	2012
Barium	129.55 µg/L 6.5% of the EPA limit 2000 µg/L worst single sample: 131 µg/L	2/2	SYR4	2012
Bromoform	0.5950 µg/L No EPA limit set worst single sample: 0.6000 µg/L	2/44	SYR4	2012–2019
Lithium	13.6 µg/L No EPA limit set	2/4	UCMR-5	2023
Chromium	0.2100 µg/L 0.2% of the EPA limit 100 µg/L	1/8	SYR4	2012–2013

84 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitrate-NitriteOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Phone: 7635095080
Email: [email protected]

Frequently asked questions about Plymouth

Is Plymouth tap water safe to drink?

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

What contaminants were detected in Plymouth's water?

EPA monitoring detected Copper, Lead, Chloroform, Bromodichloromethane, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does Plymouth serve?

Plymouth reports serving 76,546 people in Minnesota, per its EPA record.

Has Plymouth had any water quality violations?

The EPA has 2 violations on file for Plymouth, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.