What was found in ZIP 57236
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 |
|---|---|---|---|
| Nitrite | 3770 µg/L 377% of the EPA limit, at the 95th percentile of samples — 1000 µg/L Main supplier: GARDEN CITY · 33 people · 2019 | 1/1 | SYR4 |
| Copper | 514 µg/L 40% of the EPA limit 1300 µg/L Main supplier: GARDEN CITY · 33 people · 2018 | 1/1 | SYR4 |
| Lead | 7.815 µg/L 52% of the EPA limit 15 µg/L Main supplier: GARDEN CITY · 33 people · 2018 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 6.636 µg/L 11% of the EPA limit 60 µg/L Main supplier: GARDEN CITY · 33 people · 2017 | 1/1 | SYR4 |
| TTHM | 0.7100 µg/L 0.9% of the EPA limit 80 µg/L Main supplier: GARDEN CITY · 33 people · 2017 | 1/1 | SYR4 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: GARDEN CITY · 33 people · 2025 | 1/1 | 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 57236
| Supplier | State | Population served |
|---|---|---|
| GARDEN CITY | SD | 33 |
Frequently asked questions about ZIP 57236 tap water
Is the tap water in ZIP 57236 safe to drink?
EPA testing detected 6 contaminants across the water suppliers serving ZIP 57236. 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 57236?
1 public water supplier report EPA drinking-water monitoring for ZIP 57236. Each is listed above with its population served.
What contaminants are in ZIP 57236's water?
EPA monitoring detected Nitrite, Copper, Lead, Total Haloacetic Acids (HAA5), TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.