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Tap water quality report

Waterloo, WI

EPA monitoring detected 19 contaminants across the 1 water supplier serving Waterloo. 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
3,520
people served
19
contaminants found
Wisconsin rankings Lead in Wisconsin PFAS in Wisconsin

What was found in Waterloo'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
6020 µg/L 60%
of the EPA limit 10000 µg/L
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2019
1/1 SYR4
Nitrate-Nitrite
5850 µg/L 59%
of the EPA limit 10000 µg/L
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2017
1/1 SYR4
Fluoride
1050 µg/L 26%
of the EPA limit 4000 µg/L
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2019
1/1 SYR4
Copper
695.5 µg/L 54%
of the EPA limit 1300 µg/L
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2017
1/1 SYR4
Barium
42 µg/L 2.1%
of the EPA limit 2000 µg/L
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2017
1/1 SYR4
Lead
18.95 µg/L 126%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2017
1/1 SYR4
TTHM
5.8415 µg/L 7.3%
of the EPA limit 80 µg/L
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
3.21 pCi/L 21%
of the EPA limit 15 pCi/L
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2014
1/1 SYR4
Combined Radium (-226 And -228)
2.9535 pCi/L 59%
of the EPA limit 5 pCi/L
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2017
1/1 SYR4
Xylenes, Total
2.72 µg/L 0%
of the EPA limit 10000 µg/L
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2019
1/1 SYR4
Bromoform
2.335 µg/L
No EPA limit set
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2019
1/1 SYR4
Dibromochloromethane
1.89 µg/L
No EPA limit set
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
1.16 µg/L 1.9%
of the EPA limit 60 µg/L
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2019
1/1 SYR4
Bromodichloromethane
1.0695 µg/L
No EPA limit set
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2019
1/1 SYR4
Dibromoacetic Acid
0.9845 µg/L
No EPA limit set
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2019
1/1 SYR4
Chlorobenzene
0.6500 µg/L 0.7%
of the EPA limit 100 µg/L
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2019
1/1 SYR4
Monobromoacetic Acid
0.2500 µg/L
No EPA limit set
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2019
1/1 SYR4
Dichloroacetic Acid
0.1500 µg/L
No EPA limit set
Main supplier: WATERLOO WATERWORKS · 3,520 people · 2019
1/1 SYR4
Lead
0.0013 mg/L 8.7%
of the EPA limit 0.0150 mg/L
Main supplier: WATERLOO WATERWORKS · 3,520 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 Waterloo

SupplierPopulation served
WATERLOO WATERWORKS 3,520

Frequently asked questions about Waterloo tap water

Is Waterloo tap water safe to drink?

EPA testing detected 19 contaminants in the water serving Waterloo. 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 Waterloo?

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

What contaminants are in Waterloo's water?

The contaminants EPA monitoring detected in Waterloo include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. 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.