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Tap water quality report

Iola, WI

EPA monitoring detected 20 contaminants across the 1 water supplier serving Iola. 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
1,249
people served
20
contaminants found
Wisconsin rankings Lead in Wisconsin PFAS in Wisconsin

What was found in Iola'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
4195 µg/L 42%
of the EPA limit 10000 µg/L
Main supplier: IOLA WATERWORKS · 1,249 people · 2019
1/1 SYR4
Nitrate-Nitrite
4167.5 µg/L 42%
of the EPA limit 10000 µg/L
Main supplier: IOLA WATERWORKS · 1,249 people · 2017
1/1 SYR4
Fluoride
308 µg/L 7.7%
of the EPA limit 4000 µg/L
Main supplier: IOLA WATERWORKS · 1,249 people · 2017
1/1 SYR4
Copper
238.2 µg/L 18%
of the EPA limit 1300 µg/L
Main supplier: IOLA WATERWORKS · 1,249 people · 2017
1/1 SYR4
Barium
178.765 µg/L 8.9%
of the EPA limit 2000 µg/L
Main supplier: IOLA WATERWORKS · 1,249 people · 2017
1/1 SYR4
Total Haloacetic Acids (HAA5)
14.799 µg/L 25%
of the EPA limit 60 µg/L
Main supplier: IOLA WATERWORKS · 1,249 people · 2019
1/1 SYR4
Monochloroacetic Acid
12.97 µg/L
No EPA limit set
Main supplier: IOLA WATERWORKS · 1,249 people · 2019
1/1 SYR4
TTHM
12.605 µg/L 16%
of the EPA limit 80 µg/L
Main supplier: IOLA WATERWORKS · 1,249 people · 2019
1/1 SYR4
Dibromochloromethane
6.348 µg/L
No EPA limit set
Main supplier: IOLA WATERWORKS · 1,249 people · 2019
1/1 SYR4
Lead
6.329 µg/L 42%
of the EPA limit 15 µg/L
Main supplier: IOLA WATERWORKS · 1,249 people · 2017
1/1 SYR4
Chloroform
4.7925 µg/L
No EPA limit set
Main supplier: IOLA WATERWORKS · 1,249 people · 2019
1/1 SYR4
Bromodichloromethane
4.4625 µg/L
No EPA limit set
Main supplier: IOLA WATERWORKS · 1,249 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
4.43 pCi/L 30%
of the EPA limit 15 pCi/L
Main supplier: IOLA WATERWORKS · 1,249 people · 2014
1/1 SYR4
Bromoform
2.0185 µg/L
No EPA limit set
Main supplier: IOLA WATERWORKS · 1,249 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
1.909 pCi/L 38%
of the EPA limit 5 pCi/L
Main supplier: IOLA WATERWORKS · 1,249 people · 2014
1/1 SYR4
Selenium
0.9900 µg/L 2%
of the EPA limit 50 µg/L
Main supplier: IOLA WATERWORKS · 1,249 people · 2017
1/1 SYR4
Trichloroacetic Acid
0.8770 µg/L
No EPA limit set
Main supplier: IOLA WATERWORKS · 1,249 people · 2019
1/1 SYR4
Thallium, Total
0.5000 µg/L 25%
of the EPA limit 2 µg/L
Main supplier: IOLA WATERWORKS · 1,249 people · 2017
1/1 SYR4
Tetrachloroethylene
0.4031 µg/L 8.1%
of the EPA limit 5 µg/L
Main supplier: IOLA WATERWORKS · 1,249 people · 2017
1/1 SYR4
Lead
0.0120 mg/L 80%
of the EPA limit 0.0150 mg/L
Main supplier: IOLA WATERWORKS · 1,249 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 Iola

SupplierPopulation served
IOLA WATERWORKS 1,249

Frequently asked questions about Iola tap water

Is Iola tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Iola. 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 Iola?

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

What contaminants are in Iola's water?

The contaminants EPA monitoring detected in Iola 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.