What was found in ZIP 58621
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 |
|---|---|---|---|
| Fluoride | 920 µg/L 23% of the EPA limit 4000 µg/L Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2016 | 1/2 | SYR4 |
| Nitrate-Nitrite | 120 µg/L 1.2% of the EPA limit 10000 µg/L Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2019 | 1/2 | SYR4 |
| Copper | 111.8 µg/L 8.6% of the EPA limit 1300 µg/L Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2019 | 2/2 | SYR4 |
| Lithium | 52.3 µg/L No EPA limit set Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2025 | 2/2 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 24.3125 µg/L 41% of the EPA limit 60 µg/L Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 20.05 µg/L No EPA limit set Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2019 | 2/2 | SYR4 |
| Lead | 4.7725 µg/L 32% of the EPA limit 15 µg/L Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2019
Highest in the ZIP: 19.879 µg/L — BEACH CITY OF · 981 people · 2017 | 2/2 | SYR4 |
| TTHM | 12.154 µg/L 15% of the EPA limit 80 µg/L Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2019
Highest in the ZIP: 14.448 µg/L — BEACH CITY OF · 981 people · 2019 | 2/2 | SYR4 |
| Barium | 12.6 µg/L 0.6% of the EPA limit 2000 µg/L Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2016 | 1/2 | SYR4 |
| Chloroform | 10.192 µg/L No EPA limit set Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2019
Highest in the ZIP: 12.26 µg/L — BEACH CITY OF · 981 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 3.555 µg/L No EPA limit set Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 3.4375 µg/L No EPA limit set Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2019 | 1/2 | SYR4 |
| Bromate | 3 µg/L 30% of the EPA limit 10 µg/L Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 1.982 µg/L No EPA limit set Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2019
Highest in the ZIP: 2.188 µg/L — BEACH CITY OF · 981 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 1.22 µg/L No EPA limit set Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2019 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 0.3590 pCi/L 2.4% of the EPA limit 15 pCi/L Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2018 | 1/2 | SYR4 |
| Pentachlorophenol | 0.0400 µg/L 4% of the EPA limit 1 µg/L Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2017 | 1/2 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: SOUTHWEST WATER AUTHORITY · 8,537 people · 2025
Highest in the ZIP: 0.0035 mg/L — BEACH CITY OF · 981 people · 2023 | 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 58621
| Supplier | State | Population served |
|---|---|---|
| SOUTHWEST WATER AUTHORITY | ND | 8,537 |
| BEACH CITY OF | ND | 981 |
Frequently asked questions about ZIP 58621 tap water
Is the tap water in ZIP 58621 safe to drink?
EPA testing detected 18 contaminants across the water suppliers serving ZIP 58621. 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 58621?
2 public water suppliers report EPA drinking-water monitoring for ZIP 58621. Each is listed above with its population served.
What contaminants are in ZIP 58621's water?
EPA monitoring detected Fluoride, Nitrate-Nitrite, Copper, Lithium, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.