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Tap water quality report

Hartford, WI

EPA monitoring detected 18 contaminants across the 2 water suppliers serving Hartford. 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.

2
water suppliers
15,859
people served
18
contaminants found
Wisconsin rankings Lead in Wisconsin PFAS in Wisconsin

What was found in Hartford'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-Nitrite
3090 µg/L 31%
of the EPA limit 10000 µg/L
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2017
Highest in the city: 5595 µg/L — LAKESIDE ESTATES · 54 people · 2019
2/2 SYR4
Nitrate
3630 µg/L 36%
of the EPA limit 10000 µg/L
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2019
Highest in the city: 5460 µg/L — LAKESIDE ESTATES · 54 people · 2018
2/2 SYR4
Fluoride
1106 µg/L 28%
of the EPA limit 4000 µg/L
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2019
1/2 SYR4
Copper
1020 µg/L 78%
of the EPA limit 1300 µg/L
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2017
2/2 SYR4
Barium
73.55 µg/L 3.7%
of the EPA limit 2000 µg/L
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2017
2/2 SYR4
TTHM
19.148 µg/L 24%
of the EPA limit 80 µg/L
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2019
1/2 SYR4
Lead
13.3 µg/L 89%
of the EPA limit 15 µg/L
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2017
2/2 SYR4
Chloroform
11 µg/L
No EPA limit set
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
9.0105 µg/L 15%
of the EPA limit 60 µg/L
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2019
1/2 SYR4
Bromodichloromethane
5.86 µg/L
No EPA limit set
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2019
1/2 SYR4
Dichloroacetic Acid
4.94 µg/L
No EPA limit set
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2019
1/2 SYR4
Trichloroacetic Acid
4.26 µg/L
No EPA limit set
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2019
1/2 SYR4
Dibromochloromethane
2.425 µg/L
No EPA limit set
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2019
1/2 SYR4
Combined Radium (-226 And -228)
1.18 pCi/L 24%
of the EPA limit 5 pCi/L
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2014
2/2 SYR4
Dibromoacetic Acid
0.8675 µg/L
No EPA limit set
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2019
1/2 SYR4
Bromoform
0.5940 µg/L
No EPA limit set
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2019
1/2 SYR4
Monobromoacetic Acid
0.3540 µg/L
No EPA limit set
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2019
1/2 SYR4
Lead
0.00086 mg/L 5.7%
of the EPA limit 0.0150 mg/L
Main supplier: HARTFORD WATERWORKS · 15,805 people · 2023
Highest in the city: 0.0066 mg/L — LAKESIDE ESTATES · 54 people · 2024
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 Hartford

SupplierPopulation served
HARTFORD WATERWORKS 15,805
LAKESIDE ESTATES 54

Frequently asked questions about Hartford tap water

Is Hartford tap water safe to drink?

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

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

What contaminants are in Hartford's water?

The contaminants EPA monitoring detected in Hartford include Nitrate-Nitrite, Nitrate, 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.