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Tap water quality report

Clear Lake, IA

EPA monitoring detected 15 contaminants across the 2 water suppliers serving Clear Lake. 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
7,737
people served
15
contaminants found
Iowa rankings Lead in Iowa PFAS in Iowa

What was found in Clear Lake'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
Fluoride
1000 µg/L 25%
of the EPA limit 4000 µg/L
Main supplier: CLEAR LAKE WATER DEPARTMENT · 7,687 people · 2012
Highest in the city: 1800 µg/L — LONG BEACH MOBILE PARK · 50 people · 2013
2/2 SYR4
Copper
211.55 µg/L 16%
of the EPA limit 1300 µg/L
Main supplier: CLEAR LAKE WATER DEPARTMENT · 7,687 people · 2019
Highest in the city: 393 µg/L — LONG BEACH MOBILE PARK · 50 people · 2019
2/2 SYR4
Barium
120 µg/L 6%
of the EPA limit 2000 µg/L
Main supplier: CLEAR LAKE WATER DEPARTMENT · 7,687 people · 2012
2/2 SYR4
Lead
9.2375 µg/L 62%
of the EPA limit 15 µg/L
Main supplier: CLEAR LAKE WATER DEPARTMENT · 7,687 people · 2019
Highest in the city: 73.55 µg/L — LONG BEACH MOBILE PARK · 50 people · 2019
2/2 SYR4
TTHM
29.1 µg/L 36%
of the EPA limit 80 µg/L
Main supplier: CLEAR LAKE WATER DEPARTMENT · 7,687 people · 2019
1/2 SYR4
Chloroform
23.1 µg/L
No EPA limit set
Main supplier: CLEAR LAKE WATER DEPARTMENT · 7,687 people · 2019
1/2 SYR4
Lithium
19.2 µg/L
No EPA limit set
Main supplier: CLEAR LAKE WATER DEPARTMENT · 7,687 people · 2023
1/2 UCMR-5
Total Haloacetic Acids (HAA5)
11.2 µg/L 19%
of the EPA limit 60 µg/L
Main supplier: CLEAR LAKE WATER DEPARTMENT · 7,687 people · 2019
1/2 SYR4
Dichloroacetic Acid
6.4 µg/L
No EPA limit set
Main supplier: CLEAR LAKE WATER DEPARTMENT · 7,687 people · 2019
1/2 SYR4
Bromodichloromethane
4.8 µg/L
No EPA limit set
Main supplier: CLEAR LAKE WATER DEPARTMENT · 7,687 people · 2019
1/2 SYR4
Combined Radium (-226 And -228)
1.5 pCi/L 30%
of the EPA limit 5 pCi/L
Main supplier: CLEAR LAKE WATER DEPARTMENT · 7,687 people · 2014
Highest in the city: 4.72 pCi/L — LONG BEACH MOBILE PARK · 50 people · 2016
2/2 SYR4
Trichloroacetic Acid
4.4 µg/L
No EPA limit set
Main supplier: CLEAR LAKE WATER DEPARTMENT · 7,687 people · 2019
1/2 SYR4
Xylenes, Total
1.785 µg/L 0%
of the EPA limit 10000 µg/L
Main supplier: CLEAR LAKE WATER DEPARTMENT · 7,687 people · 2018
1/2 SYR4
Dibromochloromethane
1.47 µg/L
No EPA limit set
Main supplier: CLEAR LAKE WATER DEPARTMENT · 7,687 people · 2019
1/2 SYR4
Lead
0.0036 mg/L 24%
of the EPA limit 0.0150 mg/L
Main supplier: CLEAR LAKE WATER DEPARTMENT · 7,687 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 Clear Lake

SupplierPopulation served
CLEAR LAKE WATER DEPARTMENT 7,687
LONG BEACH MOBILE PARK 50

Frequently asked questions about Clear Lake tap water

Is Clear Lake tap water safe to drink?

EPA testing detected 15 contaminants in the water serving Clear Lake. 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 Clear Lake?

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

What contaminants are in Clear Lake's water?

The contaminants EPA monitoring detected in Clear Lake include Fluoride, Copper, Barium, Lead, TTHM. 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.