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Tap water quality report

Wall Lake, IA

EPA monitoring detected 18 contaminants across the 2 water suppliers serving Wall 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
2,495
people served
18
contaminants found
Iowa rankings Lead in Iowa PFAS in Iowa

What was found in Wall 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
Nitrate
13000 µg/L 130%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
Highest in the city: WALL LAKE WATER SUPPLY · 780 people · 2019
1/2 SYR4
Copper
1479.9999999999998 µg/L 114%
of the EPA limit, at the 95th percentile of samples — 1300 µg/L
Main supplier: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2017
2/2 SYR4
Fluoride
800 µg/L 20%
of the EPA limit 4000 µg/L
Main supplier: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2012
2/2 SYR4
Barium
150 µg/L 7.5%
of the EPA limit 2000 µg/L
Main supplier: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2012
2/2 SYR4
TTHM
56.65 µg/L 71%
of the EPA limit 80 µg/L
Main supplier: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019
2/2 SYR4
Chloroform
35.65 µg/L
No EPA limit set
Main supplier: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
35.25 µg/L 59%
of the EPA limit 60 µg/L
Main supplier: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019
2/2 SYR4
Combined Uranium
32 µg/L 107%
of the EPA limit, at the 95th percentile of samples — 30 µg/L
Highest in the city: WALL LAKE WATER SUPPLY · 780 people · 2016
1/2 SYR4
Lithium
20 µg/L
No EPA limit set
Main supplier: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2023
1/2 UCMR-5
Trichloroacetic Acid
17.95 µg/L
No EPA limit set
Main supplier: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019
2/2 SYR4
Bromodichloromethane
16 µg/L
No EPA limit set
Main supplier: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019
2/2 SYR4
Dichloroacetic Acid
15.95 µg/L
No EPA limit set
Main supplier: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019
2/2 SYR4
Gross Alpha, Excl. Radon And U
9.69 pCi/L 65%
of the EPA limit 15 pCi/L
Highest in the city: WALL LAKE WATER SUPPLY · 780 people · 2015
1/2 SYR4
Dibromochloromethane
6.025 µg/L
No EPA limit set
Main supplier: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019
Highest in the city: 7.81 µg/L — WALL LAKE WATER SUPPLY · 780 people · 2019
2/2 SYR4
Lead
2.95 µg/L 20%
of the EPA limit 15 µg/L
Main supplier: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2017
Highest in the city: 5.549999999999999 µg/L — WALL LAKE WATER SUPPLY · 780 people · 2018
2/2 SYR4
Dibromoacetic Acid
2 µg/L
No EPA limit set
Main supplier: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2019
2/2 SYR4
Bromoform
1.27 µg/L
No EPA limit set
Highest in the city: WALL LAKE WATER SUPPLY · 780 people · 2019
1/2 SYR4
Lead
0.0017 mg/L 11%
of the EPA limit 0.0150 mg/L
Main supplier: WEST CENTRAL RWA-BOYER SYSTEM · 1,715 people · 2023
Highest in the city: 0.0023 mg/L — WALL LAKE WATER SUPPLY · 780 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 Wall Lake

SupplierPopulation served
WEST CENTRAL RWA-BOYER SYSTEM 1,715
WALL LAKE WATER SUPPLY 780

Frequently asked questions about Wall Lake tap water

Is Wall Lake tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Wall 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 Wall Lake?

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

What contaminants are in Wall Lake's water?

The contaminants EPA monitoring detected in Wall Lake include Nitrate, Copper, Fluoride, Barium, 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.