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Tap water quality report

Knapp, WI

EPA monitoring detected 10 contaminants across the 1 water supplier serving Knapp. 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
486
people served
10
contaminants found
Wisconsin rankings Lead in Wisconsin PFAS in Wisconsin

What was found in Knapp'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
Toluene
340 µg/L 34%
of the EPA limit 1000 µg/L
Main supplier: KNAPP WATERWORKS · 486 people · 2017
1/1 SYR4
Copper
306.85 µg/L 24%
of the EPA limit 1300 µg/L
Main supplier: KNAPP WATERWORKS · 486 people · 2019
1/1 SYR4
Lead
31.4 µg/L 209%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: KNAPP WATERWORKS · 486 people · 2019
1/1 SYR4
Barium
22.7 µg/L 1.1%
of the EPA limit 2000 µg/L
Main supplier: KNAPP WATERWORKS · 486 people · 2017
1/1 SYR4
TTHM
2.53 µg/L 3.2%
of the EPA limit 80 µg/L
Main supplier: KNAPP WATERWORKS · 486 people · 2017
1/1 SYR4
Combined Radium (-226 And -228)
1.4975 pCi/L 30%
of the EPA limit 5 pCi/L
Main supplier: KNAPP WATERWORKS · 486 people · 2014
1/1 SYR4
Chloroform
1.3 µg/L
No EPA limit set
Main supplier: KNAPP WATERWORKS · 486 people · 2017
1/1 SYR4
Bromodichloromethane
0.7800 µg/L
No EPA limit set
Main supplier: KNAPP WATERWORKS · 486 people · 2017
1/1 SYR4
Total Haloacetic Acids (HAA5)
0.1500 µg/L 0.3%
of the EPA limit 60 µg/L
Main supplier: KNAPP WATERWORKS · 486 people · 2017
1/1 SYR4
Lead
0.0060 mg/L 40%
of the EPA limit 0.0150 mg/L
Main supplier: KNAPP WATERWORKS · 486 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 Knapp

SupplierPopulation served
KNAPP WATERWORKS 486

Frequently asked questions about Knapp tap water

Is Knapp tap water safe to drink?

EPA testing detected 10 contaminants in the water serving Knapp. 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 Knapp?

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

What contaminants are in Knapp's water?

The contaminants EPA monitoring detected in Knapp include Toluene, Copper, Lead, Barium, TTHM. 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.