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Tap water quality report

Horicon Waterworks

EPA monitoring tested this supplier for 108 contaminants and detected 18. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

108
contaminants tested
18
detected
3,682
people served
40
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
Water source
Ground water
Ownership
Local government
Counties served
Dodge

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.

40
health-based violations
61
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2023-01-01
TT Health-based Resolved 2023-01-01
TT Health-based Resolved 2023-01-01
TT Health-based Resolved 2014-01-01
TT Health-based Resolved 2014-01-01
TT Health-based Resolved 2014-01-01
TT Health-based Resolved 2014-01-01
MCL Health-based Resolved 2009-08-01 → 2009-08-31
MCL Health-based Resolved 2009-08-01 → 2009-08-31
MCL Health-based Resolved 2009-08-01 → 2009-08-31

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
842.9 µg/L 21%
of the EPA limit 4000 µg/L
worst single sample: 1350 µg/L
102/198 SYR4 2012–2019
Copper
562 µg/L 43%
of the EPA limit 1300 µg/L
worst single sample: 878 µg/L
38/40 SYR4 2014–2017
Combined Radium (-226 And -228)
6.15 pCi/L 123%
of the EPA limit, at the 95th percentile of samples — 5 pCi/L
worst single sample: 6.6 pCi/L
19/19 SYR4 2013–2019
Lead
0.0032 mg/L 21%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2023
Nitrate
196 µg/L 2%
of the EPA limit 10000 µg/L
 10/46 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
11.828 pCi/L 79%
of the EPA limit 15 pCi/L
worst single sample: 12.1133 pCi/L
9/9 SYR4 2013–2017
Lead
9.5655 µg/L 64%
of the EPA limit 15 µg/L
worst single sample: 11.9 µg/L
8/40 SYR4 2014–2017
TTHM
4.8139 µg/L 6%
of the EPA limit 80 µg/L
worst single sample: 5.208 µg/L
8/8 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
10.6895 µg/L 18%
of the EPA limit 60 µg/L
worst single sample: 15.6 µg/L
8/8 SYR4 2013–2019
Chloroform
2.584 µg/L
No EPA limit set
worst single sample: 3.13 µg/L
7/8 SYR4 2013–2019
Barium
108.5 µg/L 5.4%
of the EPA limit 2000 µg/L
worst single sample: 111 µg/L
6/6 SYR4 2014–2017
Combined Uranium
0.4220 µg/L 1.4%
of the EPA limit 30 µg/L
worst single sample: 0.4300 µg/L
5/5 SYR4 2013–2014
Bromodichloromethane
1.3985 µg/L
No EPA limit set
worst single sample: 1.4 µg/L
4/8 SYR4 2013–2019
Dibromochloromethane
1.7148 µg/L
No EPA limit set
worst single sample: 1.83 µg/L
3/8 SYR4 2013–2019
Monochloroacetic Acid
14.197 µg/L
No EPA limit set
worst single sample: 15.6 µg/L
3/8 SYR4 2013–2019
Dichloroacetic Acid
0.6330 µg/L
No EPA limit set
worst single sample: 0.6400 µg/L
2/8 SYR4 2013–2019
Xylenes, Total
0.2634 µg/L 0%
of the EPA limit 10000 µg/L
worst single sample: 0.2640 µg/L
2/15 SYR4 2012–2017
Dibromoacetic Acid
0.3800 µg/L
No EPA limit set
 1/8 SYR4 2013–2019
90 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, TotalArsenicAtrazineBhc-GammaBenzeneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitrate-NitriteNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Horicon Waterworks

Is Horicon Waterworks tap water safe to drink?

EPA monitoring detected 18 contaminants in Horicon 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 Horicon Waterworks's water?

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

How many people does Horicon Waterworks serve?

Horicon Waterworks reports serving 3,682 people in Wisconsin, per its EPA record.

Has Horicon Waterworks had any water quality violations?

The EPA has 61 violations on file for Horicon Waterworks, of which 40 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.