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Tap water quality report

Brookings, SD

EPA monitoring detected 7 contaminants across the 4 water suppliers serving Brookings. 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.

4
water suppliers
23,603
people served
7
contaminants found
South Dakota rankings Lead in South Dakota PFAS in South Dakota

What was found in Brookings'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
Copper
40 µg/L 3.1%
of the EPA limit 1300 µg/L
Main supplier: BROOKINGS MUNICIPAL UTILITIES · 23,377 people · 2017
Highest in the city: 1214.5 µg/L — SOUTHBROOK ESTATES · 28 people · 2019
3/4 SYR4
Nitrate
1000 µg/L 10%
of the EPA limit 10000 µg/L
Main supplier: BROOKINGS MUNICIPAL UTILITIES · 23,377 people · 2019
1/4 SYR4
TTHM
82.7 µg/L 103%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: BROOKINGS MUNICIPAL UTILITIES · 23,377 people · 2019
Highest in the city: 85.06 µg/L — UNIVERSITY ESTATES · 150 people · 2019
3/4 SYR4
Lithium
37.4 µg/L
No EPA limit set
Main supplier: BROOKINGS MUNICIPAL UTILITIES · 23,377 people · 2024
1/4 UCMR-5
Total Haloacetic Acids (HAA5)
25.2 µg/L 42%
of the EPA limit 60 µg/L
Main supplier: BROOKINGS MUNICIPAL UTILITIES · 23,377 people · 2019
Highest in the city: 25.4 µg/L — UNIVERSITY ESTATES · 150 people · 2019
3/4 SYR4
Lead
8.92 µg/L 59%
of the EPA limit 15 µg/L
Main supplier: BROOKINGS MUNICIPAL UTILITIES · 23,377 people · 2017
3/4 SYR4
Lead
0.0080 mg/L 53%
of the EPA limit 0.0150 mg/L
Main supplier: BROOKINGS MUNICIPAL UTILITIES · 23,377 people · 2023
4/4 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 Brookings

SupplierPopulation served
BROOKINGS MUNICIPAL UTILITIES 23,377
UNIVERSITY ESTATES 150
NORTH BROOKINGS WATER AND SANITARY D 48
SOUTHBROOK ESTATES 28

Frequently asked questions about Brookings tap water

Is Brookings tap water safe to drink?

EPA testing detected 7 contaminants in the water serving Brookings. 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 Brookings?

4 public water suppliers report drinking-water monitoring for Brookings, South Dakota to the EPA. Each is listed above with its population served.

What contaminants are in Brookings's water?

The contaminants EPA monitoring detected in Brookings include Copper, Nitrate, TTHM, Lithium, Total Haloacetic Acids (HAA5). 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.