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Tap water quality report

Brooklyn, IA

EPA monitoring detected 18 contaminants across the 2 water suppliers serving Brooklyn. 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
15,425
people served
18
contaminants found
Iowa rankings Lead in Iowa PFAS in Iowa

What was found in Brooklyn'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
600 µg/L 15%
of the EPA limit 4000 µg/L
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2013
1/2 SYR4
Nitrate
500 µg/L 5%
of the EPA limit 10000 µg/L
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2019
1/2 SYR4
TTHM
59.645 µg/L 75%
of the EPA limit 80 µg/L
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2019
Highest in the city: 76.13 µg/L — BROOKLYN WATER DEPARTMENT · 1,505 people · 2019
2/2 SYR4
Copper
60.98 µg/L 4.7%
of the EPA limit 1300 µg/L
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2019
Highest in the city: 64.595 µg/L — BROOKLYN WATER DEPARTMENT · 1,505 people · 2018
2/2 SYR4
Chloroform
42.005 µg/L
No EPA limit set
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2019
Highest in the city: 57.34 µg/L — BROOKLYN WATER DEPARTMENT · 1,505 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
34.8 µg/L 58%
of the EPA limit 60 µg/L
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2019
2/2 SYR4
Barium
21.6 µg/L 1.1%
of the EPA limit 2000 µg/L
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2013
1/2 SYR4
Monochloroacetic Acid
18.16 µg/L
No EPA limit set
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2019
2/2 SYR4
Dichloroacetic Acid
15.63 µg/L
No EPA limit set
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2019
Highest in the city: 16.19 µg/L — BROOKLYN WATER DEPARTMENT · 1,505 people · 2019
2/2 SYR4
Bromodichloromethane
12.93 µg/L
No EPA limit set
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2019
Highest in the city: 14.38 µg/L — BROOKLYN WATER DEPARTMENT · 1,505 people · 2019
2/2 SYR4
Trichloroacetic Acid
7.9165 µg/L
No EPA limit set
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2019
Highest in the city: 7.98 µg/L — BROOKLYN WATER DEPARTMENT · 1,505 people · 2019
2/2 SYR4
Dibromochloromethane
5.8575 µg/L
No EPA limit set
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2019
Highest in the city: 6.243 µg/L — BROOKLYN WATER DEPARTMENT · 1,505 people · 2019
2/2 SYR4
Lead
4.425 µg/L 30%
of the EPA limit 15 µg/L
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2019
Highest in the city: 5.3 µg/L — BROOKLYN WATER DEPARTMENT · 1,505 people · 2018
2/2 SYR4
Selenium
3.2 µg/L 6.4%
of the EPA limit 50 µg/L
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2013
1/2 SYR4
Dibromoacetic Acid
3 µg/L
No EPA limit set
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2019
2/2 SYR4
Monobromoacetic Acid
1.321 µg/L
No EPA limit set
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2019
1/2 SYR4
Bromoform
0.7480 µg/L
No EPA limit set
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 people · 2019
2/2 SYR4
Lead
0.00060 mg/L 4%
of the EPA limit 0.0150 mg/L
Main supplier: POWESHIEK WATER ASSOCIATION · 13,920 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 Brooklyn

SupplierPopulation served
POWESHIEK WATER ASSOCIATION 13,920
BROOKLYN WATER DEPARTMENT 1,505

Frequently asked questions about Brooklyn tap water

Is Brooklyn tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Brooklyn. 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 Brooklyn?

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

What contaminants are in Brooklyn's water?

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