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Tap water quality report

De Pere, WI

EPA monitoring detected 14 contaminants across the 4 water suppliers serving De Pere. 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.

4
water suppliers
38,778
people served
14
contaminants found
Wisconsin rankings Lead in Wisconsin PFAS in Wisconsin

What was found in De Pere'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
Copper
340.5 µg/L 26%
of the EPA limit 1300 µg/L
Main supplier: DE PERE WATERWORKS SA 1 · 25,660 people · 2017
Highest in the city: 890.9 µg/L — LEDGEVIEW TN SANITARY DIST 2 · 7,602 people · 2017
3/4 SYR4
TTHM
70.52 µg/L 88%
of the EPA limit 80 µg/L
Main supplier: DE PERE WATERWORKS SA 1 · 25,660 people · 2019
Highest in the city: 87.405 µg/L — LEDGEVIEW TN SANITARY DIST 2 · 7,602 people · 2019
3/4 SYR4
Lead
3.705 µg/L 25%
of the EPA limit 15 µg/L
Main supplier: DE PERE WATERWORKS SA 1 · 25,660 people · 2017
Highest in the city: 73.415 µg/L — LAWRENCE WATERWORKS · 5,398 people · 2017
3/4 SYR4
Chloroform
46.9 µg/L
No EPA limit set
Main supplier: DE PERE WATERWORKS SA 1 · 25,660 people · 2019
Highest in the city: 62.75 µg/L — LEDGEVIEW TN SANITARY DIST 2 · 7,602 people · 2019
3/4 SYR4
Total Haloacetic Acids (HAA5)
37.44 µg/L 62%
of the EPA limit 60 µg/L
Main supplier: DE PERE WATERWORKS SA 1 · 25,660 people · 2019
Highest in the city: 41.824 µg/L — LAWRENCE WATERWORKS · 5,398 people · 2019
3/4 SYR4
Trichloroacetic Acid
18 µg/L
No EPA limit set
Main supplier: DE PERE WATERWORKS SA 1 · 25,660 people · 2019
Highest in the city: 20.1 µg/L — LEDGEVIEW TN SANITARY DIST 2 · 7,602 people · 2019
3/4 SYR4
Monochloroacetic Acid
1.3 µg/L
No EPA limit set
Main supplier: DE PERE WATERWORKS SA 1 · 25,660 people · 2019
Highest in the city: 19.86 µg/L — LAWRENCE WATERWORKS · 5,398 people · 2019
3/4 SYR4
Bromodichloromethane
18 µg/L
No EPA limit set
Main supplier: DE PERE WATERWORKS SA 1 · 25,660 people · 2019
3/4 SYR4
Dichloroacetic Acid
17.45 µg/L
No EPA limit set
Main supplier: DE PERE WATERWORKS SA 1 · 25,660 people · 2019
3/4 SYR4
Dibromochloromethane
6.69 µg/L
No EPA limit set
Main supplier: DE PERE WATERWORKS SA 1 · 25,660 people · 2019
Highest in the city: 6.745 µg/L — LAWRENCE WATERWORKS · 5,398 people · 2019
3/4 SYR4
Monobromoacetic Acid
1.45 µg/L
No EPA limit set
Main supplier: DE PERE WATERWORKS SA 1 · 25,660 people · 2019
2/4 SYR4
Dibromoacetic Acid
1.3 µg/L
No EPA limit set
Main supplier: DE PERE WATERWORKS SA 1 · 25,660 people · 2019
Highest in the city: 1.415 µg/L — LEDGEVIEW TN SANITARY DIST 2 · 7,602 people · 2019
3/4 SYR4
Bromoform
0.5400 µg/L
No EPA limit set
Highest in the city: LEDGEVIEW TN SANITARY DIST 2 · 7,602 people · 2019
1/4 SYR4
Lead
0.00066 mg/L 4.4%
of the EPA limit 0.0150 mg/L
Main supplier: DE PERE WATERWORKS SA 1 · 25,660 people · 2023
Highest in the city: 0.0021 mg/L — LEDGEVIEW TN SANITARY DIST 2 · 7,602 people · 2023
4/4 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 De Pere

SupplierPopulation served
DE PERE WATERWORKS SA 1 25,660
LEDGEVIEW TN SANITARY DIST 2 7,602
LAWRENCE WATERWORKS 5,398
DE PERE WATERWORKS SA 2 118

Frequently asked questions about De Pere tap water

Is De Pere tap water safe to drink?

EPA testing detected 14 contaminants in the water serving De Pere. 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 De Pere?

4 public water suppliers report drinking-water monitoring for De Pere, Wisconsin to the EPA. Each is listed above with its population served.

What contaminants are in De Pere's water?

The contaminants EPA monitoring detected in De Pere include Copper, TTHM, Lead, Chloroform, Total Haloacetic Acids (HAA5). 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.