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Tap water quality report

Mount Horeb, WI

EPA monitoring detected 25 contaminants across the 1 water supplier serving Mount Horeb. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
7,756
people served
25
contaminants found
Wisconsin rankings Lead in Wisconsin PFAS in Wisconsin

What was found in Mount Horeb's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate-Nitrite
4812.5 µg/L 48%
of the EPA limit 10000 µg/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2019
1/1 SYR4
Nitrate
4280 µg/L 43%
of the EPA limit 10000 µg/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2017
1/1 SYR4
Copper
1080 µg/L 83%
of the EPA limit 1300 µg/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2017
1/1 SYR4
Fluoride
838.9 µg/L 21%
of the EPA limit 4000 µg/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2019
1/1 SYR4
Lead
84 µg/L 560%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2017
1/1 SYR4
Barium
26.24 µg/L 1.3%
of the EPA limit 2000 µg/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2017
1/1 SYR4
TTHM
18.265 µg/L 23%
of the EPA limit 80 µg/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2019
1/1 SYR4
Xylenes, Total
13.66 µg/L 0.1%
of the EPA limit 10000 µg/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
11.8 pCi/L 79%
of the EPA limit 15 pCi/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2017
1/1 SYR4
Gross Beta Particle Activity
6.5975 pCi/L
No EPA limit set
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2017
1/1 SYR4
Bromodichloromethane
4.31 µg/L
No EPA limit set
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2019
1/1 SYR4
Chloroform
4.28 µg/L
No EPA limit set
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2019
1/1 SYR4
Dibromochloromethane
4.2 µg/L
No EPA limit set
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
4.08 pCi/L 82%
of the EPA limit 5 pCi/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2017
1/1 SYR4
Combined Uranium
3.83 µg/L 13%
of the EPA limit 30 µg/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2014
1/1 SYR4
Bromoform
3.44 µg/L
No EPA limit set
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2019
1/1 SYR4
Ethylbenzene
2.703 µg/L 0.4%
of the EPA limit 700 µg/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2019
1/1 SYR4
Dichloroacetic Acid
1.4 µg/L
No EPA limit set
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
1.38 µg/L 2.3%
of the EPA limit 60 µg/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2019
1/1 SYR4
Dibromoacetic Acid
1 µg/L
No EPA limit set
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2019
1/1 SYR4
Tetrachloroethylene
0.1400 µg/L 2.8%
of the EPA limit 5 µg/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2019
1/1 SYR4
Styrene
0.1000 µg/L 0.1%
of the EPA limit 100 µg/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2019
1/1 SYR4
Pfpea
0.0044 µg/L
No EPA limit set
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2024
1/1 UCMR-5
PFHXS
0.0033 µg/L
No EPA limit set
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2024
1/1 UCMR-5
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
Main supplier: MT HOREB WATERWORKS · 7,756 people · 2023
1/1 LCR
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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Mount Horeb

SupplierPopulation served
MT HOREB WATERWORKS 7,756

Frequently asked questions about Mount Horeb tap water

Is Mount Horeb tap water safe to drink?

EPA testing detected 25 contaminants in the water serving Mount Horeb. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Mount Horeb?

1 public water supplier report drinking-water monitoring for Mount Horeb, Wisconsin to the EPA. Each is listed above with its population served.

What contaminants are in Mount Horeb's water?

The contaminants EPA monitoring detected in Mount Horeb include Nitrate-Nitrite, Nitrate, Copper, Fluoride, Lead. The full list, with the level at the main supplier and the data source, is in the table above.

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.