Tap WaterIndex

← Wisconsin

Tap water quality report

Pepin Waterworks

EPA monitoring tested this supplier for 75 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

75
contaminants tested
19
detected
816
people served
51
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
Water source
Ground water
Ownership
Local government
Counties served
Pepin

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.

51
health-based violations
74
violations on file
8
still open
ViolationTypeStatusPeriod
TT Health-based Unaddressed 2025-10-03
TT Health-based Unaddressed 2025-10-03
TT Health-based Unaddressed 2025-10-03
TT Health-based Unaddressed 2025-10-03
TT Health-based Unaddressed 2025-10-03
TT Health-based Unaddressed 2025-10-03
TT Health-based Resolved 2025-08-02
TT Health-based Resolved 2025-08-02
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-05-02

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
5150 µg/L 52%
of the EPA limit 10000 µg/L
worst single sample: 6400 µg/L
76/76 SYR4 2012–2019
Copper
1220.5 µg/L 94%
of the EPA limit 1300 µg/L
worst single sample: 1230 µg/L
20/20 SYR4 2014–2017
Lead
0.0053 mg/L 36%
of the EPA limit 0.0150 mg/L
 19/19 LCR 2021
Combined Radium (-226 And -228)
3.735 pCi/L 75%
of the EPA limit 5 pCi/L
worst single sample: 4.5 pCi/L
11/11 SYR4 2013–2017
Gross Alpha, Excl. Radon And U
3.45 pCi/L 23%
of the EPA limit 15 pCi/L
worst single sample: 3.9 pCi/L
10/10 SYR4 2013–2017
Lead
4 µg/L 27%
of the EPA limit 15 µg/L
 10/20 SYR4 2014–2017
Barium
64.03 µg/L 3.2%
of the EPA limit 2000 µg/L
worst single sample: 64.6 µg/L
7/7 SYR4 2013–2017
Nitrate-Nitrite
4422 µg/L 44%
of the EPA limit 10000 µg/L
worst single sample: 4800 µg/L
7/7 SYR4 2013–2017
Fluoride
105 µg/L 2.6%
of the EPA limit 4000 µg/L
worst single sample: 110 µg/L
6/6 SYR4 2014–2017
Total Haloacetic Acids (HAA5)
2.98275 µg/L 5%
of the EPA limit 60 µg/L
worst single sample: 3.327 µg/L
6/7 SYR4 2013–2019
Monochloroacetic Acid
2.854 µg/L
No EPA limit set
worst single sample: 3.08 µg/L
5/7 SYR4 2013–2019
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
 3/7 SYR4 2013–2017
Bromodichloromethane
2.1895 µg/L
No EPA limit set
worst single sample: 2.24 µg/L
2/7 SYR4 2013–2019
TTHM
6.21925 µg/L 7.8%
of the EPA limit 80 µg/L
worst single sample: 6.479 µg/L
2/7 SYR4 2013–2019
Chloroform
2.24 µg/L
No EPA limit set
 1/7 SYR4 2013–2019
Combined Uranium
0.4300 µg/L 1.4%
of the EPA limit 30 µg/L
 1/1 SYR4 2017
Dibromochloromethane
1.46 µg/L
No EPA limit set
 1/7 SYR4 2013–2019
Dichloroacetic Acid
0.4320 µg/L
No EPA limit set
 1/7 SYR4 2013–2019
Gross Beta Particle Activity
1.1 pCi/L
No EPA limit set
 1/1 SYR4 2013
56 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDibromoacetic AcidDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Pepin Waterworks

Is Pepin Waterworks tap water safe to drink?

EPA monitoring detected 19 contaminants in Pepin Waterworks'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 Pepin Waterworks's water?

EPA monitoring detected Nitrate, Copper, Lead, Combined Radium (-226 And -228), Gross Alpha, Excl. Radon And U, and others. The full list with the level and data source for each is above.

How many people does Pepin Waterworks serve?

Pepin Waterworks reports serving 816 people in Wisconsin, per its EPA record.

Has Pepin Waterworks had any water quality violations?

The EPA has 74 violations on file for Pepin Waterworks, of which 51 are health-based (a contaminant limit or required treatment was breached) and 8 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.