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Tap water quality report

Thorp Waterworks

EPA monitoring tested this supplier for 78 contaminants and detected 21. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

78
contaminants tested
21
detected
1,636
people served
8
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
Water source
Ground water
Ownership
Local government
Counties served
Clark

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.

8
health-based violations
359
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-12-11
TT Health-based Resolved 2024-12-11
TT Health-based Resolved 2024-12-11
TT Health-based Resolved 2024-12-11
TT Health-based Resolved 2022-11-02
TT Health-based Resolved 2022-11-02
MCL Health-based Resolved 2006-04-01 → 2007-01-10
MCL Health-based Resolved 2006-04-01 → 2007-01-10
Other Monitoring Resolved 2024-12-11
Other Monitoring Resolved 2024-12-11

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
7600 µg/L 76%
of the EPA limit 10000 µg/L
worst single sample: 8600 µg/L
166/166 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
14.575 pCi/L 97%
of the EPA limit 15 pCi/L
worst single sample: 19.7 pCi/L
42/42 SYR4 2012–2019
Combined Radium (-226 And -228)
4.791 pCi/L 96%
of the EPA limit 5 pCi/L
worst single sample: 5.31 pCi/L
40/40 SYR4 2012–2019
Gross Beta Particle Activity
8.03 pCi/L
No EPA limit set
worst single sample: 9.22 pCi/L
40/40 SYR4 2012–2019
Bromodichloromethane
5.63 µg/L
No EPA limit set
worst single sample: 7.3 µg/L
23/23 SYR4 2013–2019
Combined Uranium
8.911 µg/L 30%
of the EPA limit 30 µg/L
worst single sample: 9.82 µg/L
23/23 SYR4 2012–2019
Dibromochloromethane
6.51 µg/L
No EPA limit set
worst single sample: 7.2 µg/L
23/23 SYR4 2013–2019
Bromoform
2.5 µg/L
No EPA limit set
 21/23 SYR4 2013–2019
Copper
1110 µg/L 85%
of the EPA limit 1300 µg/L
worst single sample: 1210 µg/L
21/24 SYR4 2014–2017
Chloroform
3.6 µg/L
No EPA limit set
worst single sample: 5.8 µg/L
21/23 SYR4 2013–2019
Lead
0.0140 mg/L 93%
of the EPA limit 0.0150 mg/L
 18/18 LCR 2025
TTHM
18.97 µg/L 24%
of the EPA limit 80 µg/L
worst single sample: 22.2 µg/L
18/18 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
4.451 µg/L 7.4%
of the EPA limit 60 µg/L
worst single sample: 4.5 µg/L
15/15 SYR4 2013–2019
Dibromoacetic Acid
2.205 µg/L
No EPA limit set
worst single sample: 2.4 µg/L
14/15 SYR4 2013–2019
Lead
11.5 µg/L 77%
of the EPA limit 15 µg/L
worst single sample: 13 µg/L
11/24 SYR4 2014–2017
Barium
59.3 µg/L 3%
of the EPA limit 2000 µg/L
worst single sample: 60 µg/L
8/8 SYR4 2014–2017
Dichloroacetic Acid
1.66 µg/L
No EPA limit set
worst single sample: 1.8 µg/L
8/15 SYR4 2013–2019
Fluoride
375 µg/L 9.4%
of the EPA limit 4000 µg/L
worst single sample: 410 µg/L
8/8 SYR4 2014–2017
Nitrate-Nitrite
6670 µg/L 67%
of the EPA limit 10000 µg/L
worst single sample: 7300 µg/L
8/8 SYR4 2014–2017
Monobromoacetic Acid
0.6090 µg/L
No EPA limit set
worst single sample: 0.6300 µg/L
4/15 SYR4 2013–2019
Trichloroacetic Acid
0.8470 µg/L
No EPA limit set
worst single sample: 0.8800 µg/L
4/15 SYR4 2013–2019
57 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, TotalArsenicAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Thorp Waterworks

Is Thorp Waterworks tap water safe to drink?

EPA monitoring detected 21 contaminants in Thorp 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 Thorp Waterworks's water?

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

How many people does Thorp Waterworks serve?

Thorp Waterworks reports serving 1,636 people in Wisconsin, per its EPA record.

Has Thorp Waterworks had any water quality violations?

The EPA has 359 violations on file for Thorp Waterworks, of which 8 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.