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Tap water quality report

Neillsville Waterworks

EPA monitoring tested this supplier for 73 contaminants and detected 20. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

73
contaminants tested
20
detected
2,384
people served
0
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.

0
health-based violations
17
violations on file
1
still open
ViolationTypeStatusPeriod
RPT Monitoring Unaddressed 2025-07-02
Other Monitoring Resolved 2022-07-01
Other Monitoring Resolved 2022-07-01
Other Monitoring Resolved 2022-07-01
Other Monitoring Resolved 2022-07-01
MR Monitoring Resolved 2021-02-01
MR Monitoring Resolved 2021-02-01
MR Monitoring Resolved 2014-01-01 → 2014-12-31
MR Monitoring Resolved 2014-01-01 → 2014-12-31
MR Monitoring Resolved 2014-01-01 → 2014-12-31

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
Fluoride
1104 µg/L 28%
of the EPA limit 4000 µg/L
worst single sample: 1450 µg/L
97/196 SYR4 2012–2019
Copper
332.2 µg/L 26%
of the EPA limit 1300 µg/L
worst single sample: 339 µg/L
18/20 SYR4 2014–2017
Nitrate
2040 µg/L 20%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Lead
0.0011 mg/L 7.7%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2023
Lead
5.595 µg/L 37%
of the EPA limit 15 µg/L
worst single sample: 7.02 µg/L
11/20 SYR4 2014–2017
Bromodichloromethane
12.56 µg/L
No EPA limit set
worst single sample: 12.6 µg/L
5/5 SYR4 2015–2019
Chloroform
25.52 µg/L
No EPA limit set
worst single sample: 26.6 µg/L
5/5 SYR4 2015–2019
Dichloroacetic Acid
13.5 µg/L
No EPA limit set
worst single sample: 15.1 µg/L
5/5 SYR4 2015–2019
Monochloroacetic Acid
20.94 µg/L
No EPA limit set
worst single sample: 22.4 µg/L
5/5 SYR4 2015–2019
TTHM
39.076 µg/L 49%
of the EPA limit 80 µg/L
worst single sample: 39.2 µg/L
5/5 SYR4 2015–2019
Total Haloacetic Acids (HAA5)
41.944 µg/L 70%
of the EPA limit 60 µg/L
worst single sample: 45.9 µg/L
5/5 SYR4 2015–2019
Trichloroacetic Acid
6.018 µg/L
No EPA limit set
worst single sample: 6.55 µg/L
5/5 SYR4 2015–2019
Dibromoacetic Acid
1.8485 µg/L
No EPA limit set
worst single sample: 1.85 µg/L
4/5 SYR4 2015–2019
Dibromochloromethane
10.502 µg/L
No EPA limit set
worst single sample: 11.3 µg/L
4/5 SYR4 2015–2019
Barium
30.121 µg/L 1.5%
of the EPA limit 2000 µg/L
worst single sample: 31.2 µg/L
2/2 SYR4 2014–2017
Monobromoacetic Acid
1.8045 µg/L
No EPA limit set
worst single sample: 1.87 µg/L
2/5 SYR4 2015–2019
Nitrate-Nitrite
903.35 µg/L 9%
of the EPA limit 10000 µg/L
worst single sample: 950 µg/L
2/2 SYR4 2014–2017
Bromoform
3.05 µg/L
No EPA limit set
 1/5 SYR4 2015–2019
Combined Radium (-226 And -228)
2.02 pCi/L 40%
of the EPA limit 5 pCi/L
 1/1 SYR4 2014
Gross Alpha, Excl. Radon And U
1.6 pCi/L 11%
of the EPA limit 15 pCi/L
 1/1 SYR4 2014
53 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 TetrachlorideChlordaneChromiumDichloromethaneDalaponDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Neillsville Waterworks

Is Neillsville Waterworks tap water safe to drink?

EPA monitoring detected 20 contaminants in Neillsville 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 Neillsville Waterworks's water?

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

How many people does Neillsville Waterworks serve?

Neillsville Waterworks reports serving 2,384 people in Wisconsin, per its EPA record.

Has Neillsville Waterworks had any water quality violations?

The EPA has 17 violations on file for Neillsville Waterworks, of which 0 are health-based (a contaminant limit or required treatment was breached) and 1 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.