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Tap water quality report

Hayward, WI

EPA monitoring detected 24 contaminants across the 7 water suppliers serving Hayward. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

7
water suppliers
5,982
people served
24
contaminants found
Wisconsin rankings Lead in Wisconsin PFAS in Wisconsin

What was found in Hayward's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
TTHM
5300 µg/L 6625%
of the EPA limit, in the worst sample — 80 µg/L
 4/7 SYR4
Nitrate-Nitrite
4460 µg/L 45%
of the EPA limit 10000 µg/L
 3/7 SYR4
Copper
3050 µg/L 235%
of the EPA limit, in the worst sample — 1300 µg/L
 7/7 SYR4
Nitrate
1600 µg/L 16%
of the EPA limit 10000 µg/L
 7/7 SYR4
Fluoride
1060 µg/L 27%
of the EPA limit 4000 µg/L
 6/7 SYR4
Lead
479 µg/L 3193%
of the EPA limit, in the worst sample — 15 µg/L
 7/7 SYR4
Barium
98 µg/L 4.9%
of the EPA limit 2000 µg/L
 7/7 SYR4
Total Haloacetic Acids (HAA5)
16 µg/L 27%
of the EPA limit 60 µg/L
 4/7 SYR4
Cyanide
13 µg/L 6.5%
of the EPA limit 200 µg/L
 1/7 SYR4
Monochloroacetic Acid
7.36 µg/L
No EPA limit set
 1/7 SYR4
Chloroform
6.7 µg/L
No EPA limit set
 2/7 SYR4
Combined Radium (-226 And -228)
4.55 pCi/L 91%
of the EPA limit 5 pCi/L
 6/7 SYR4
Gross Alpha, Excl. Radon And U
4.55 pCi/L 30%
of the EPA limit 15 pCi/L
 5/7 SYR4
Bromodichloromethane
4.5 µg/L
No EPA limit set
 2/7 SYR4
Dibromochloromethane
3 µg/L
No EPA limit set
 2/7 SYR4
Dichloroacetic Acid
2.7 µg/L
No EPA limit set
 2/7 SYR4
Arsenic
2.5 µg/L 25%
of the EPA limit 10 µg/L
 5/7 SYR4
Combined Uranium
1.84 µg/L 6.1%
of the EPA limit 30 µg/L
 3/7 SYR4
Trichloroacetic Acid
1.8 µg/L
No EPA limit set
 2/7 SYR4
Di(2-ethylhexyl) Phthalate
1.5 µg/L 25%
of the EPA limit 6 µg/L
 1/7 SYR4
Chromium
1.2 µg/L 1.2%
of the EPA limit 100 µg/L
 2/7 SYR4
Bromoform
1 µg/L
No EPA limit set
 1/7 SYR4
Dibromoacetic Acid
0.8800 µg/L
No EPA limit set
 2/7 SYR4
Lead
0.0148 mg/L 99%
of the EPA limit 0.0150 mg/L
 7/7 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 single worst sample on record — 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 Hayward

SupplierPopulation served
DRY TOWN 3,030
HAYWARD WATER UTILITY 2,552
NEW POST 150
S AND J WILD RIVER MHP 90
TAMARACK HEALTH HAYWARD MEDICAL CENTER 85
LUEDTKES MOBILE HOME PARK 50
BIG MUSKY RESORT 25

Frequently asked questions about Hayward tap water

Is Hayward tap water safe to drink?

EPA testing detected 24 contaminants in the water serving Hayward. 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 Hayward?

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

What contaminants are in Hayward's water?

The contaminants EPA monitoring detected in Hayward include TTHM, Nitrate-Nitrite, Copper, Nitrate, Fluoride. The full list, with the highest level found 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.