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Tap water quality report

Keokuk, IA

EPA monitoring detected 20 contaminants across the 1 water supplier serving Keokuk. 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
9,900
people served
20
contaminants found
Iowa rankings Lead in Iowa PFAS in Iowa

What was found in Keokuk'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
6400 µg/L 64%
of the EPA limit 10000 µg/L
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2019
1/1 SYR4
Fluoride
810 µg/L 20%
of the EPA limit 4000 µg/L
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2012
1/1 SYR4
TTHM
84.3 µg/L 105%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2019
1/1 SYR4
Chloroform
72.65 µg/L
No EPA limit set
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2019
1/1 SYR4
Copper
44 µg/L 3.4%
of the EPA limit 1300 µg/L
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2017
1/1 SYR4
Total Haloacetic Acids (HAA5)
36.65 µg/L 61%
of the EPA limit 60 µg/L
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2019
1/1 SYR4
Dichloroacetic Acid
25.65 µg/L
No EPA limit set
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2019
1/1 SYR4
Lead
23.4 µg/L 156%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2017
1/1 SYR4
Lithium
17 µg/L
No EPA limit set
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2025
1/1 UCMR-5
Bromodichloromethane
11.65 µg/L
No EPA limit set
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2019
1/1 SYR4
Trichloroacetic Acid
11 µg/L
No EPA limit set
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2019
1/1 SYR4
Monochloroacetic Acid
4 µg/L
No EPA limit set
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2019
1/1 SYR4
Dibromochloromethane
3.1 µg/L
No EPA limit set
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2019
1/1 SYR4
P-Dichlorobenzene
1.04 µg/L 1.4%
of the EPA limit 75 µg/L
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2019
1/1 SYR4
Dibromoacetic Acid
1 µg/L
No EPA limit set
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2019
1/1 SYR4
Dalapon
0.5000 µg/L 0.3%
of the EPA limit 200 µg/L
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2016
1/1 SYR4
Atrazine
0.2000 µg/L 6.7%
of the EPA limit 3 µg/L
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2019
1/1 SYR4
Pfba
0.0110 µg/L
No EPA limit set
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2025
1/1 UCMR-5
PFBS
0.0063 µg/L
No EPA limit set
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 people · 2025
1/1 UCMR-5
Lead
0.0060 mg/L 40%
of the EPA limit 0.0150 mg/L
Main supplier: KEOKUK MUNICIPAL WATER WORKS · 9,900 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 Keokuk

SupplierPopulation served
KEOKUK MUNICIPAL WATER WORKS 9,900

Frequently asked questions about Keokuk tap water

Is Keokuk tap water safe to drink?

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

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

What contaminants are in Keokuk's water?

The contaminants EPA monitoring detected in Keokuk include Nitrate, Fluoride, TTHM, Chloroform, Copper. 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.