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Tap water quality report

ZIP 57709 — Rapid City, SD

EPA monitoring across the 23 water suppliers serving ZIP 57709 in Rapid City, SD detected 15 contaminants. A detection doesn't automatically mean the water is unsafe — see the highest level found below, with the EPA limit for each.

23
water suppliers
5,585
people served
15
contaminants found

What was found in ZIP 57709

The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
5960 µg/L 60%
of the EPA limit 10000 µg/L
 17/23 SYR4
Copper
2160 µg/L 166%
of the EPA limit, in the worst sample — 1300 µg/L
 23/23 SYR4
Fluoride
500 µg/L 13%
of the EPA limit 4000 µg/L
 18/23 SYR4
Barium
399 µg/L 20%
of the EPA limit 2000 µg/L
 20/23 SYR4
Nitrite
107 µg/L 11%
of the EPA limit 1000 µg/L
 1/23 SYR4
Lead
21 µg/L 140%
of the EPA limit, in the worst sample — 15 µg/L
 23/23 SYR4
Gross Alpha, Excl. Radon And U
17.8 pCi/L 119%
of the EPA limit, in the worst sample — 15 pCi/L
 18/23 SYR4
TTHM
16.3 µg/L 20%
of the EPA limit 80 µg/L
 16/23 SYR4
Selenium
12 µg/L 24%
of the EPA limit 50 µg/L
 3/23 SYR4
Combined Uranium
8.66 µg/L 29%
of the EPA limit 30 µg/L
 1/23 SYR4
Total Haloacetic Acids (HAA5)
7.51 µg/L 13%
of the EPA limit 60 µg/L
 2/23 SYR4
Arsenic
6 µg/L 60%
of the EPA limit 10 µg/L
 5/23 SYR4
Chromium
2 µg/L 2%
of the EPA limit 100 µg/L
 1/23 SYR4
Mercury
0.2000 µg/L 10%
of the EPA limit 2 µg/L
 1/23 SYR4
Lead
0.0140 mg/L 93%
of the EPA limit 0.0150 mg/L
 23/23 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.

Water suppliers serving ZIP 57709

SupplierStatePopulation served
CHAPEL LANE WATER COMPANY SD 1,200
WONDERLAND HOMES SD 750
SUN VALLEY DEVELOPMENT SD 650
PRAIRIE ACRES LLC SD 350
STAGEBARN SANITARY DISTRICT SD 295
PRAIRIE ACRES NORTH SD 288
CARRIAGE HILLS SD 267
DRY CREEK ESTATES SD 233
BOULDER PARK WATER USERS ASSOCIATION SD 200
PRAIRIE ACRES SOUTH SD 170
STRATO RIM ESTATES WATER COMPANY SD 170
PONDEROSA MOBILE HOME RANCH SD 150
B & J MOBILE HOME PARK SD 135
MIDLAND HEIGHTS SD 130
EAST RIDGE ACRES SD 118
ELK CREEK VILLAGE SD 110
PRAIRIE HAVEN SUBDIVISION SD 105
EDELWEISS MOUNTAIN IMPROVEMENT ASSOC SD 70
ELK VALLEY RANCHETTES SD 62
GOLDEN HILLS HOMES SD 47
RIMROCK RIDGE WATER ASSOCIATION SD 35
PONDEROSA WATER COMPANY SD 25
PINEVIEW WATER ASSOCIATION SD 25

Frequently asked questions about ZIP 57709 tap water

Is the tap water in ZIP 57709 safe to drink?

EPA testing detected 15 contaminants across the water suppliers serving ZIP 57709. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.

Which water suppliers serve ZIP 57709?

23 public water suppliers report EPA drinking-water monitoring for ZIP 57709. Each is listed above with its population served.

What contaminants are in ZIP 57709's water?

EPA monitoring detected Nitrate, Copper, Fluoride, Barium, Nitrite, and others across this ZIP's suppliers. The full list with levels and sources is above.