What was found in ZIP 57430
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 |
|---|---|---|---|
| Copper | 711.4999999999993 µg/L 55% of the EPA limit 1300 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2019
Highest in the ZIP: 865.9999999999997 µg/L — PEEVER · 140 people · 2017 | 7/7 | SYR4 |
| Nitrate | 800 µg/L 8% of the EPA limit 10000 µg/L Highest in the ZIP: SUNSET COLONY · 140 people · 2012 | 1/7 | SYR4 |
| Fluoride | 590 µg/L 15% of the EPA limit 4000 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2019 | 2/7 | SYR4 |
| Lithium | 137 µg/L No EPA limit set Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2023 | 1/7 | UCMR-5 |
| Arsenic | 85.89999999999999 µg/L 859% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the ZIP: SUNSET COLONY · 140 people · 2012 | 1/7 | SYR4 |
| Nitrite | 30 µg/L 3% of the EPA limit 1000 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2019 | 1/7 | SYR4 |
| Barium | 14 µg/L 0.7% of the EPA limit 2000 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2013 | 2/7 | SYR4 |
| Chromium | 4.7 µg/L 4.7% of the EPA limit 100 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2013
Highest in the ZIP: 13.410499999999999 µg/L — SUNSET COLONY · 140 people · 2019 | 2/7 | SYR4 |
| Lead | 13.044999999999993 µg/L 87% of the EPA limit 15 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2019 | 7/7 | SYR4 |
| Total Haloacetic Acids (HAA5) | 8.7165 µg/L 15% of the EPA limit 60 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2019
Highest in the ZIP: 10.932999999999998 µg/L — BRITTON · 1,215 people · 2019 | 6/7 | SYR4 |
| TTHM | 4.3149999999999995 µg/L 5.4% of the EPA limit 80 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2019
Highest in the ZIP: 4.428999999999999 µg/L — BRITTON · 1,215 people · 2019 | 6/7 | SYR4 |
| Selenium | 0.7000 µg/L 1.4% of the EPA limit 50 µg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2013
Highest in the ZIP: 0.9000 µg/L — SUNSET COLONY · 140 people · 2019 | 2/7 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: BROWN-DAY-MARSHALL RWS · 5,673 people · 2025
Highest in the ZIP: 0.0060 mg/L — CLAREMONT · 108 people · 2023 | 7/7 | 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 57430
| Supplier | State | Population served |
|---|---|---|
| BROWN-DAY-MARSHALL RWS | SD | 5,673 |
| BRITTON | SD | 1,215 |
| PEEVER | SD | 140 |
| SUNSET COLONY | SD | 140 |
| CLAREMONT | SD | 108 |
| LAKE CITY | SD | 45 |
| AMHERST WATER COMPANY | SD | 40 |
Frequently asked questions about ZIP 57430 tap water
Is the tap water in ZIP 57430 safe to drink?
EPA testing detected 13 contaminants across the water suppliers serving ZIP 57430. 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 57430?
7 public water suppliers report EPA drinking-water monitoring for ZIP 57430. Each is listed above with its population served.
What contaminants are in ZIP 57430's water?
EPA monitoring detected Copper, Nitrate, Fluoride, Lithium, Arsenic, and others across this ZIP's suppliers. The full list with levels and sources is above.