What was found in ZIP 57769
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 823 µg/L 8.2% of the EPA limit 10000 µg/L Main supplier: BLACK HAWK WATER USER DISTRICT · 4,500 people · 2018
Highest in the ZIP: 9900 µg/L — BESTGEN ADDITION WATER COMPANY · 73 people · 2019 | 16/28 | SYR4 |
| Fluoride | 1600 µg/L 40% of the EPA limit 4000 µg/L Highest in the ZIP: RIMROCK HIGHLAND ESTATES COMM ASSOC · 66 people · 2017 | 19/28 | SYR4 |
| Copper | 317.65 µg/L 24% of the EPA limit 1300 µg/L Main supplier: BLACK HAWK WATER USER DISTRICT · 4,500 people · 2017
Highest in the ZIP: 607 µg/L — BESTGEN ADDITION WATER COMPANY · 73 people · 2018 | 26/28 | SYR4 |
| Barium | 533.7 µg/L 27% of the EPA limit 2000 µg/L Highest in the ZIP: WESTBERRY TRAILS WATER USERS ASSOC · 155 people · 2018 | 19/28 | SYR4 |
| TTHM | 3.32 µg/L 4.1% of the EPA limit 80 µg/L Main supplier: BLACK HAWK WATER USER DISTRICT · 4,500 people · 2019
Highest in the ZIP: 82.3 µg/L — SHERIDAN LAKE HIGHLANDS, INC. · 85 people · 2019 | 15/28 | SYR4 |
| Total Haloacetic Acids (HAA5) | 67.06 µg/L 112% of the EPA limit, at the 95th percentile of samples — 60 µg/L Highest in the ZIP: SHERIDAN LAKE HIGHLANDS, INC. · 85 people · 2019 | 7/28 | SYR4 |
| Selenium | 17 µg/L 34% of the EPA limit 50 µg/L Highest in the ZIP: RIMROCK HIGHLAND ESTATES COMM ASSOC · 66 people · 2017 | 3/28 | SYR4 |
| Gross Alpha, Excl. Radon And U | 13.5 pCi/L 90% of the EPA limit 15 pCi/L Highest in the ZIP: AUTUMN MEADOWS SANITARY DISTRICT · 49 people · 2019 | 16/28 | SYR4 |
| Combined Uranium | 11 µg/L 37% of the EPA limit 30 µg/L Highest in the ZIP: TIMBERWOOD PARK ESTATES · 283 people · 2019 | 2/28 | SYR4 |
| Lead | 3.905 µg/L 26% of the EPA limit 15 µg/L Main supplier: BLACK HAWK WATER USER DISTRICT · 4,500 people · 2017
Highest in the ZIP: 10 µg/L — PIEDMONT · 971 people · 2019 | 26/28 | SYR4 |
| Arsenic | 8 µg/L 80% of the EPA limit 10 µg/L Highest in the ZIP: BLUCKSBERG MOUNTAIN #2 · 333 people · 2018 | 4/28 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: BLACK HAWK WATER USER DISTRICT · 4,500 people · 2023
Highest in the ZIP: 0.0090 mg/L — BLUCKSBERG MOUNTAIN #2 · 333 people · 2025 | 28/28 | 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.
Water suppliers serving ZIP 57769
| Supplier | State | Population served |
|---|---|---|
| BLACK HAWK WATER USER DISTRICT | SD | 4,500 |
| NORTHDALE SANITARY DISTRICT | SD | 1,075 |
| PIEDMONT | SD | 971 |
| WESTON HEIGHTS HOMEOWNERS ASSOCIATIO | SD | 412 |
| BLUCKSBERG MOUNTAIN #2 | SD | 333 |
| TIMBERWOOD PARK ESTATES | SD | 283 |
| SUNSET RANCH | SD | 263 |
| VALLEY VIEW WATER COMPANY | SD | 248 |
| SUNNYSIDE MOBILE HOME PARK II | SD | 235 |
| BLUCKSBERG MOUNTAIN #1 | SD | 223 |
| HORSESHOE ACRES WATER ASSOCIATION | SD | 180 |
| WESTBERRY TRAILS WATER USERS ASSOC | SD | 155 |
| ROLLING DICE SUBDIVISION | SD | 122 |
| ELK CREEK VILLAGE | SD | 110 |
| SPRING CANYON WATER COMPANY | SD | 89 |
| SHERIDAN LAKE HIGHLANDS, INC. | SD | 85 |
| BESTGEN ADDITION WATER COMPANY | SD | 73 |
| CROOKED OAKS CANYON HOMEOWNERS | SD | 70 |
| RIMROCK HIGHLAND ESTATES COMM ASSOC | SD | 66 |
| AUTUMN MEADOWS SANITARY DISTRICT | SD | 49 |
| PLEASANT VALLEY HOMEOWNERS ASSOCIATI | SD | 48 |
| CAVALRY TRAILS HOMEOWNER ASSOCIATION | SD | 44 |
| PINE CONE ESTATES | SD | 42 |
| VALLEY VIEW WATER ASSOCIATION | SD | 42 |
| CEDAR GULCH 2 | SD | 40 |
| LOFTY PINES II | SD | 38 |
| BRIDLE RIDGE ESTATES | SD | 38 |
| GOLDEN HILLS SUBDIVISION | SD | 30 |
Frequently asked questions about ZIP 57769 tap water
Is the tap water in ZIP 57769 safe to drink?
EPA testing detected 12 contaminants across the water suppliers serving ZIP 57769. 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 57769?
28 public water suppliers report EPA drinking-water monitoring for ZIP 57769. Each is listed above with its population served.
What contaminants are in ZIP 57769's water?
EPA monitoring detected Nitrate, Fluoride, Copper, Barium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.