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Tap water quality report

Monona, WI

EPA monitoring detected 26 contaminants across the 1 water supplier serving Monona. 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
8,624
people served
26
contaminants found
Wisconsin rankings Lead in Wisconsin PFAS in Wisconsin

What was found in Monona'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
4490 µg/L 45%
of the EPA limit 10000 µg/L
Main supplier: MONONA WATERWORKS · 8,624 people · 2017
1/1 SYR4
Nitrate-Nitrite
4265 µg/L 43%
of the EPA limit 10000 µg/L
Main supplier: MONONA WATERWORKS · 8,624 people · 2019
1/1 SYR4
Fluoride
1052 µg/L 26%
of the EPA limit 4000 µg/L
Main supplier: MONONA WATERWORKS · 8,624 people · 2019
1/1 SYR4
Copper
283.3 µg/L 22%
of the EPA limit 1300 µg/L
Main supplier: MONONA WATERWORKS · 8,624 people · 2017
1/1 SYR4
Barium
60.15 µg/L 3%
of the EPA limit 2000 µg/L
Main supplier: MONONA WATERWORKS · 8,624 people · 2017
1/1 SYR4
TTHM
15.223 µg/L 19%
of the EPA limit 80 µg/L
Main supplier: MONONA WATERWORKS · 8,624 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
6.97 pCi/L 46%
of the EPA limit 15 pCi/L
Main supplier: MONONA WATERWORKS · 8,624 people · 2014
1/1 SYR4
Lead
6.695 µg/L 45%
of the EPA limit 15 µg/L
Main supplier: MONONA WATERWORKS · 8,624 people · 2017
1/1 SYR4
Bromodichloromethane
4.46 µg/L
No EPA limit set
Main supplier: MONONA WATERWORKS · 8,624 people · 2019
1/1 SYR4
Dibromochloromethane
4.27 µg/L
No EPA limit set
Main supplier: MONONA WATERWORKS · 8,624 people · 2019
1/1 SYR4
Chloroform
3.96 µg/L
No EPA limit set
Main supplier: MONONA WATERWORKS · 8,624 people · 2019
1/1 SYR4
Gross Beta Particle Activity
2.739 pCi/L
No EPA limit set
Main supplier: MONONA WATERWORKS · 8,624 people · 2014
1/1 SYR4
Total Haloacetic Acids (HAA5)
2.64 µg/L 4.4%
of the EPA limit 60 µg/L
Main supplier: MONONA WATERWORKS · 8,624 people · 2019
1/1 SYR4
Bromoform
2.3 µg/L
No EPA limit set
Main supplier: MONONA WATERWORKS · 8,624 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
1.69 pCi/L 34%
of the EPA limit 5 pCi/L
Main supplier: MONONA WATERWORKS · 8,624 people · 2014
1/1 SYR4
Dibromoacetic Acid
1.54 µg/L
No EPA limit set
Main supplier: MONONA WATERWORKS · 8,624 people · 2019
1/1 SYR4
Dichloroacetic Acid
1.285 µg/L
No EPA limit set
Main supplier: MONONA WATERWORKS · 8,624 people · 2019
1/1 SYR4
Tetrachloroethylene
0.7800 µg/L 16%
of the EPA limit 5 µg/L
Main supplier: MONONA WATERWORKS · 8,624 people · 2019
1/1 SYR4
Xylenes, Total
0.3300 µg/L 0%
of the EPA limit 10000 µg/L
Main supplier: MONONA WATERWORKS · 8,624 people · 2019
1/1 SYR4
Styrene
0.1100 µg/L 0.1%
of the EPA limit 100 µg/L
Main supplier: MONONA WATERWORKS · 8,624 people · 2019
1/1 SYR4
Pfba
0.0110 µg/L
No EPA limit set
Main supplier: MONONA WATERWORKS · 8,624 people · 2025
1/1 UCMR-5
PFHXS
0.0054 µg/L
No EPA limit set
Main supplier: MONONA WATERWORKS · 8,624 people · 2025
1/1 UCMR-5
PFBS
0.0053 µg/L
No EPA limit set
Main supplier: MONONA WATERWORKS · 8,624 people · 2025
1/1 UCMR-5
Pfpea
0.0046 µg/L
No EPA limit set
Main supplier: MONONA WATERWORKS · 8,624 people · 2025
1/1 UCMR-5
Pfhxa
0.0042 µg/L
No EPA limit set
Main supplier: MONONA WATERWORKS · 8,624 people · 2025
1/1 UCMR-5
Lead
0.0028 mg/L 19%
of the EPA limit 0.0150 mg/L
Main supplier: MONONA WATERWORKS · 8,624 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 Monona

SupplierPopulation served
MONONA WATERWORKS 8,624

Frequently asked questions about Monona tap water

Is Monona tap water safe to drink?

EPA testing detected 26 contaminants in the water serving Monona. 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 Monona?

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

What contaminants are in Monona's water?

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