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Tap water quality report

Pierre, SD

EPA monitoring detected 14 contaminants across the 5 water suppliers serving Pierre. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

5
water suppliers
26,853
people served
14
contaminants found
South Dakota rankings Lead in South Dakota PFAS in South Dakota

What was found in Pierre's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Copper
1240 µg/L 95%
of the EPA limit 1300 µg/L
 5/5 SYR4
Nitrate
1100 µg/L 11%
of the EPA limit 10000 µg/L
 2/5 SYR4
Fluoride
450 µg/L 11%
of the EPA limit 4000 µg/L
 1/5 SYR4
TTHM
89.2 µg/L 112%
of the EPA limit, in the worst sample — 80 µg/L
 5/5 SYR4
Lithium
74.1 µg/L
No EPA limit set
 3/5 UCMR-5
Total Haloacetic Acids (HAA5)
55 µg/L 92%
of the EPA limit 60 µg/L
 5/5 SYR4
Barium
42.4 µg/L 2.1%
of the EPA limit 2000 µg/L
 1/5 SYR4
Lead
30 µg/L 200%
of the EPA limit, in the worst sample — 15 µg/L
 5/5 SYR4
Gross Alpha, Excl. Radon And U
3.8 pCi/L 25%
of the EPA limit 15 pCi/L
 2/5 SYR4
Arsenic
3 µg/L 30%
of the EPA limit 10 µg/L
 1/5 SYR4
Chromium
1.6 µg/L 1.6%
of the EPA limit 100 µg/L
 1/5 SYR4
Selenium
1.4 µg/L 2.8%
of the EPA limit 50 µg/L
 1/5 SYR4
Antimony, Total
0.4000 µg/L 6.7%
of the EPA limit 6 µg/L
 1/5 SYR4
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 5/5 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 single worst sample on record — 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 Pierre

SupplierPopulation served
PIERRE 14,091
MID-DAKOTA RURAL WATER 11,833
SPRING CREEK SANITARY DISTRICT 465
TMT, INC. 250
PIERRE INDIAN LEARNING CENTER 214

Frequently asked questions about Pierre tap water

Is Pierre tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Pierre. 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 Pierre?

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

What contaminants are in Pierre's water?

The contaminants EPA monitoring detected in Pierre include Copper, Nitrate, Fluoride, TTHM, Lithium. The full list, with the highest level found 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.