What was found in ZIP 57103
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 | 810 µg/L 8.1% of the EPA limit 10000 µg/L Main supplier: SIOUX FALLS · 216,462 people · 2018
Highest in the ZIP: 2300 µg/L — MINNEHAHA COMMUNITY WATER CORP · 13,435 people · 2019 | 2/2 | SYR4 |
| Copper | 113.1 µg/L 8.7% of the EPA limit 1300 µg/L Main supplier: SIOUX FALLS · 216,462 people · 2018 | 2/2 | SYR4 |
| Lithium | 70.9 µg/L No EPA limit set Main supplier: SIOUX FALLS · 216,462 people · 2024 | 2/2 | UCMR-5 |
| TTHM | 48.2725 µg/L 60% of the EPA limit 80 µg/L Main supplier: SIOUX FALLS · 216,462 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 16 µg/L 27% of the EPA limit 60 µg/L Main supplier: SIOUX FALLS · 216,462 people · 2019
Highest in the ZIP: 23.32 µg/L — MINNEHAHA COMMUNITY WATER CORP · 13,435 people · 2019 | 2/2 | SYR4 |
| Barium | 8 µg/L 0.4% of the EPA limit 2000 µg/L Main supplier: SIOUX FALLS · 216,462 people · 2019
Highest in the ZIP: 16.635 µg/L — MINNEHAHA COMMUNITY WATER CORP · 13,435 people · 2012 | 2/2 | SYR4 |
| Lead | 6 µg/L 40% of the EPA limit 15 µg/L Main supplier: SIOUX FALLS · 216,462 people · 2018 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 4.6 pCi/L No EPA limit set Main supplier: SIOUX FALLS · 216,462 people · 2018 | 1/2 | SYR4 |
| Selenium | 1.67 µg/L 3.3% of the EPA limit 50 µg/L Highest in the ZIP: MINNEHAHA COMMUNITY WATER CORP · 13,435 people · 2012 | 1/2 | SYR4 |
| Antimony, Total | 1 µg/L 17% of the EPA limit 6 µg/L Main supplier: SIOUX FALLS · 216,462 people · 2019 | 2/2 | SYR4 |
| Arsenic | 1 µg/L 10% of the EPA limit 10 µg/L Main supplier: SIOUX FALLS · 216,462 people · 2019 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1 pCi/L 6.7% of the EPA limit 15 pCi/L Highest in the ZIP: MINNEHAHA COMMUNITY WATER CORP · 13,435 people · 2012 | 1/2 | SYR4 |
| Chromium | 0.7950 µg/L 0.8% of the EPA limit 100 µg/L Highest in the ZIP: MINNEHAHA COMMUNITY WATER CORP · 13,435 people · 2012 | 1/2 | SYR4 |
| Lead | 0.0030 mg/L 20% of the EPA limit 0.0150 mg/L Main supplier: SIOUX FALLS · 216,462 people · 2024 | 2/2 | 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 57103
| Supplier | State | Population served |
|---|---|---|
| SIOUX FALLS | SD | 216,462 |
| MINNEHAHA COMMUNITY WATER CORP | SD | 13,435 |
Frequently asked questions about ZIP 57103 tap water
Is the tap water in ZIP 57103 safe to drink?
EPA testing detected 14 contaminants across the water suppliers serving ZIP 57103. 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 57103?
2 public water suppliers report EPA drinking-water monitoring for ZIP 57103. Each is listed above with its population served.
What contaminants are in ZIP 57103's water?
EPA monitoring detected Nitrate, Copper, Lithium, TTHM, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.