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Tap water quality report

Pine Ridge, SD

EPA monitoring detected 18 contaminants across the 18 water suppliers serving Pine Ridge. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

18
water suppliers
24,811
people served
18
contaminants found
South Dakota rankings Lead in South Dakota PFAS in South Dakota

What was found in Pine Ridge'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
Nitrate
2850 µg/L 28%
of the EPA limit 10000 µg/L
 7/18 SYR4
Nitrate-Nitrite
2400 µg/L 24%
of the EPA limit 10000 µg/L
 6/18 SYR4
Fluoride
1800 µg/L 45%
of the EPA limit 4000 µg/L
 7/18 SYR4
Copper
779 µg/L 60%
of the EPA limit 1300 µg/L
 16/18 SYR4
Barium
135 µg/L 6.8%
of the EPA limit 2000 µg/L
 7/18 SYR4
Lithium
71 µg/L
No EPA limit set
 3/18 UCMR-5
TTHM
66.2 µg/L 83%
of the EPA limit 80 µg/L
 16/18 SYR4
Lead
62 µg/L 413%
of the EPA limit, in the worst sample — 15 µg/L
 9/18 SYR4
Total Haloacetic Acids (HAA5)
47.3 µg/L 79%
of the EPA limit 60 µg/L
 16/18 SYR4
Combined Uranium
34.9 µg/L 116%
of the EPA limit, in the worst sample — 30 µg/L
 5/18 SYR4
Selenium
21 µg/L 42%
of the EPA limit 50 µg/L
 4/18 SYR4
Gross Alpha, Excl. Radon And U
16.5 pCi/L 110%
of the EPA limit, in the worst sample — 15 pCi/L
 6/18 SYR4
Arsenic
12 µg/L 120%
of the EPA limit, in the worst sample — 10 µg/L
 5/18 SYR4
Chromium
6 µg/L 6%
of the EPA limit 100 µg/L
 5/18 SYR4
Combined Radium (-226 And -228)
2.3 pCi/L 46%
of the EPA limit 5 pCi/L
 7/18 SYR4
Methoxychlor
0.3100 µg/L 0.8%
of the EPA limit 40 µg/L
 1/18 SYR4
Hexachlorocyclopentadiene
0.2200 µg/L 0.4%
of the EPA limit 50 µg/L
 1/18 SYR4
Lead
0.0028 mg/L 19%
of the EPA limit 0.0150 mg/L
 18/18 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 Pine Ridge

SupplierPopulation served
PINE RIDGE WATER SYSTEM 7,482
KYLE WATER SYSTEM 6,526
OGLALA RWS PIPELINE 3,562
WANBLEE EAST 2,179
WHITE HORSE CREEK WATER SYSTEM 1,690
WANBLEE WATER SYSTEM 773
RED CLOUD SCHOOL 501
ALLEN WATER SYSTEM 420
SUNRISE WATER SYSTEM 380
PINE RIDGE HOSPITAL 316
WOUNDED KNEE WATER SYSTEM 255
EAGLE NEST HOMES 195
RED ROCKS WATER SYSTEM 125
WAKPAMNI WATER SYSTEM 104
POTATO CREEK WATER SYSTEM 95
NORTH MARTIN WATER SYSTEM 78
WOLF CREEK WATER SYSTEM 65
NORTH ALLEN WATER SYSTEM 65

Frequently asked questions about Pine Ridge tap water

Is Pine Ridge tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Pine Ridge. 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 Pine Ridge?

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

What contaminants are in Pine Ridge's water?

The contaminants EPA monitoring detected in Pine Ridge include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. 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.