← Black Hawk, SD

Tap water quality report

ZIP 57718 — Black Hawk, SD

EPA monitoring across the 49 water suppliers serving ZIP 57718 in Black Hawk, SD detected 12 contaminants. A detection doesn't automatically mean the water is unsafe — see the highest level found below, with the EPA limit for each.

49
water suppliers
11,564
people served
12
contaminants found

What was found in ZIP 57718

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
4150 µg/L 42%
of the EPA limit 10000 µg/L
30/49 SYR4
Fluoride
3900 µg/L 98%
of the EPA limit 4000 µg/L
34/49 SYR4
Copper
1570 µg/L 121%
of the EPA limit, in the worst sample — 1300 µg/L
46/49 SYR4
Barium
575 µg/L 29%
of the EPA limit 2000 µg/L
32/49 SYR4
Gross Alpha, Excl. Radon And U
57.8 pCi/L 385%
of the EPA limit, in the worst sample — 15 pCi/L
31/49 SYR4
TTHM
43.5 µg/L 54%
of the EPA limit 80 µg/L
29/49 SYR4
Combined Uranium
23.5 µg/L 78%
of the EPA limit 30 µg/L
6/49 SYR4
Lead
22 µg/L 147%
of the EPA limit, in the worst sample — 15 µg/L
46/49 SYR4
Total Haloacetic Acids (HAA5)
20.9 µg/L 35%
of the EPA limit 60 µg/L
8/49 SYR4
Arsenic
9 µg/L 90%
of the EPA limit 10 µg/L
9/49 SYR4
Selenium
9 µg/L 18%
of the EPA limit 50 µg/L
3/49 SYR4
Lead
0.0140 mg/L 93%
of the EPA limit 0.0150 mg/L
48/49 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 57718

SupplierStatePopulation served
BLACK HAWK WATER USER DISTRICT SD 4,500
NORTHDALE SANITARY DISTRICT SD 1,075
SUN VALLEY DEVELOPMENT SD 650
TERRY TROJAN WATER DISTRICT SD 400
GOLDEN VALLEY WATER COMPANY SD 283
WOODLAND HILLS SANITARY DISTRICT SD 255
VALLEY VIEW WATER COMPANY SD 248
SUNNYSIDE MOBILE HOME PARK II SD 235
DRY CREEK ESTATES SD 233
VIEWFIELD RURAL WATER SYSTEM SD 220
PINE HILLS PARK SD 200
RENDEZVOUS RANCH SD 195
PINE CLIFF ESTATES SD 180
SPRING CREEK ACRES SD 172
RAPID CITY MOBILE HOME PARK SD 170
RUSHMORE RANCH ESTATES SD 168
CANYON SPRINGS WATER AND SEWER DISTR SD 163
HIGH MEADOWS WATER COMPANY SD 140
MIDLAND HEIGHTS SD 130
EAST RIDGE ACRES SD 118
COUNTRY ROAD ESTATES SD 112
PRAIRIE HAVEN SUBDIVISION SD 105
D & E WATER COMPANY SD 100
GOLDEN MEADOWS SD 96
QUAAL WATER ASSOCIATION SD 95
HEARTLAND COUNTRY RANCHETTES SD 95
AR RANCH SD 88
OAK MOUNTAIN COUNTRY ESTATES SD 85
PEACEFUL PINES II SD 71
EDELWEISS MOUNTAIN IMPROVEMENT ASSOC SD 70
THRALL MTN. PROPERTY OWNERS ASSOCIAT SD 70
CROOKED OAKS CANYON HOMEOWNERS SD 70
WILD TURKEY ESTATES II SD 70
SHIRT TAIL GULCH DEVELOPMENT SD 65
WHISPERING WILLOWS SD 64
HIGH MEADOWS RANCHETTES SD 60
OWANKA RURAL WATER SYSTEM SD 52
AUTUMN MEADOWS SANITARY DISTRICT SD 49
EAGLE WATER COMPANY SD 48
CENTENNIAL VISTA ESTATES SD 44
SACORA MOBILE HOME PARK SD 42
76 RANCH ESTATES SD 40
VALHALLA ADDITION SD 38
HIGH SHERIDAN RANCH SD 38
PILLAR PEAK SD 38
WILD TURKEY ESTATES I SD 33
THE TIMBERS SD 33
NORRIS PEAK WATER USERS ASSOC SD 30
THREE PEAKS WATER ASSOCIATION SD 28

Frequently asked questions about ZIP 57718 tap water

Is the tap water in ZIP 57718 safe to drink?

EPA testing detected 12 contaminants across the water suppliers serving ZIP 57718. 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 57718?

49 public water suppliers report EPA drinking-water monitoring for ZIP 57718. Each is listed above with its population served.

What contaminants are in ZIP 57718's water?

EPA monitoring detected Nitrate, Fluoride, Copper, Barium, Gross Alpha, Excl. Radon And U, and others across this ZIP's suppliers. The full list with levels and sources is above.