Is Walworth, WI Tap Water Safe? Quality & Contaminants

What was found in Walworth'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.

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate	5900 µg/L 59% of the EPA limit 10000 µg/L Main supplier: WALWORTH WATERWORKS · 2,304 people · 2017	2/2	SYR4
Nitrate-Nitrite	5776.5 µg/L 58% of the EPA limit 10000 µg/L Main supplier: WALWORTH WATERWORKS · 2,304 people · 2019	2/2	SYR4
Copper	171 µg/L 13% of the EPA limit 1300 µg/L Main supplier: WALWORTH WATERWORKS · 2,304 people · 2017 Highest in the city: 718.9 µg/L — INSPIRATION MINISTRIES & MEADOWS APTS · 80 people · 2018	2/2	SYR4
Fluoride	138.5 µg/L 3.5% of the EPA limit 4000 µg/L Main supplier: WALWORTH WATERWORKS · 2,304 people · 2017 Highest in the city: 309 µg/L — INSPIRATION MINISTRIES & MEADOWS APTS · 80 people · 2018	2/2	SYR4
Barium	78.25 µg/L 3.9% of the EPA limit 2000 µg/L Main supplier: WALWORTH WATERWORKS · 2,304 people · 2017 Highest in the city: 109.2 µg/L — INSPIRATION MINISTRIES & MEADOWS APTS · 80 people · 2018	2/2	SYR4
Lead	24.8 µg/L 165% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: WALWORTH WATERWORKS · 2,304 people · 2017	2/2	SYR4
TTHM	6.282 µg/L 7.9% of the EPA limit 80 µg/L Main supplier: WALWORTH WATERWORKS · 2,304 people · 2019 Highest in the city: 11.609 µg/L — INSPIRATION MINISTRIES & MEADOWS APTS · 80 people · 2019	2/2	SYR4
Chloroform	2.513 µg/L No EPA limit set Main supplier: WALWORTH WATERWORKS · 2,304 people · 2019 Highest in the city: 8.7 µg/L — INSPIRATION MINISTRIES & MEADOWS APTS · 80 people · 2019	2/2	SYR4
Bromodichloromethane	1.806 µg/L No EPA limit set Main supplier: WALWORTH WATERWORKS · 2,304 people · 2019 Highest in the city: 3.5 µg/L — INSPIRATION MINISTRIES & MEADOWS APTS · 80 people · 2019	2/2	SYR4
Total Haloacetic Acids (HAA5)	3.03 µg/L 5.1% of the EPA limit 60 µg/L Main supplier: WALWORTH WATERWORKS · 2,304 people · 2019	2/2	SYR4
Combined Radium (-226 And -228)	2.0228 pCi/L 40% of the EPA limit 5 pCi/L Main supplier: WALWORTH WATERWORKS · 2,304 people · 2014	2/2	SYR4
Dibromochloromethane	1.7 µg/L No EPA limit set Main supplier: WALWORTH WATERWORKS · 2,304 people · 2019	1/2	SYR4
Dichloroacetic Acid	1.671 µg/L No EPA limit set Main supplier: WALWORTH WATERWORKS · 2,304 people · 2019	2/2	SYR4
Trichloroacetic Acid	0.8855 µg/L No EPA limit set Main supplier: WALWORTH WATERWORKS · 2,304 people · 2019	1/2	SYR4
Dibromoacetic Acid	0.8300 µg/L No EPA limit set Main supplier: WALWORTH WATERWORKS · 2,304 people · 2019	2/2	SYR4
Bromoform	0.7620 µg/L No EPA limit set Main supplier: WALWORTH WATERWORKS · 2,304 people · 2019	1/2	SYR4
Monobromoacetic Acid	0.3900 µg/L No EPA limit set Main supplier: WALWORTH WATERWORKS · 2,304 people · 2019	1/2	SYR4
Lead	0.0063 mg/L 42% of the EPA limit 0.0150 mg/L Main supplier: WALWORTH WATERWORKS · 2,304 people · 2025	2/2	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 Walworth

Supplier	Population served
WALWORTH WATERWORKS	2,304
INSPIRATION MINISTRIES & MEADOWS APTS	80

Frequently asked questions about Walworth tap water

Is Walworth tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Walworth. 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 Walworth?

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

What contaminants are in Walworth's water?

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