What was found in ZIP 58504
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 | 758 µg/L 19% of the EPA limit 4000 µg/L Main supplier: BISMARCK CITY OF · 72,417 people · 2017 | 1/3 | SYR4 |
| Nitrate-Nitrite | 320 µg/L 3.2% of the EPA limit 10000 µg/L Main supplier: BISMARCK CITY OF · 72,417 people · 2019 | 1/3 | SYR4 |
| Lead | 15.32 µg/L 102% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: BISMARCK CITY OF · 72,417 people · 2019
Highest in the ZIP: 294.98 µg/L — SOUTH CENTRAL REGIONAL WATER DISTRICT · 3,700 people · 2019 | 2/3 | SYR4 |
| Copper | 136 µg/L 10% of the EPA limit 1300 µg/L Main supplier: BISMARCK CITY OF · 72,417 people · 2019 | 3/3 | SYR4 |
| Lithium | 40.9 µg/L No EPA limit set Main supplier: BISMARCK CITY OF · 72,417 people · 2025
Highest in the ZIP: 79.4 µg/L — SOUTH CENTRAL REGIONAL WATER DISTRICT · 3,700 people · 2023 | 3/3 | UCMR-5 |
| TTHM | 72.6885 µg/L 91% of the EPA limit 80 µg/L Main supplier: BISMARCK CITY OF · 72,417 people · 2019 | 3/3 | SYR4 |
| Cyanide | 66 µg/L 33% of the EPA limit 200 µg/L Main supplier: BISMARCK CITY OF · 72,417 people · 2015 | 1/3 | SYR4 |
| Chloroform | 52.885 µg/L No EPA limit set Main supplier: BISMARCK CITY OF · 72,417 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 21.079 µg/L 35% of the EPA limit 60 µg/L Main supplier: BISMARCK CITY OF · 72,417 people · 2019
Highest in the ZIP: 44.335 µg/L — SOUTH CENTRAL REGIONAL WATER DISTRICT · 3,700 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 13.7 µg/L No EPA limit set Main supplier: BISMARCK CITY OF · 72,417 people · 2019
Highest in the ZIP: 30.9 µg/L — SOUTH CENTRAL REGIONAL WATER DISTRICT · 3,700 people · 2019 | 3/3 | SYR4 |
| Barium | 19.59 µg/L 1% of the EPA limit 2000 µg/L Main supplier: BISMARCK CITY OF · 72,417 people · 2017 | 1/3 | SYR4 |
| Bromodichloromethane | 18.306 µg/L No EPA limit set Main supplier: BISMARCK CITY OF · 72,417 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 8.33 µg/L No EPA limit set Main supplier: BISMARCK CITY OF · 72,417 people · 2019
Highest in the ZIP: 8.5135 µg/L — SOUTH CENTRAL REGIONAL WATER DISTRICT · 3,700 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 7.595 µg/L No EPA limit set Main supplier: BISMARCK CITY OF · 72,417 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 2.408 µg/L No EPA limit set Main supplier: BISMARCK CITY OF · 72,417 people · 2019
Highest in the ZIP: 7.197 µg/L — SOUTH CENTRAL REGIONAL WATER DISTRICT · 3,700 people · 2019 | 3/3 | SYR4 |
| Bromoform | 2.958 µg/L No EPA limit set Main supplier: BISMARCK CITY OF · 72,417 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 2.43 µg/L No EPA limit set Main supplier: BISMARCK CITY OF · 72,417 people · 2019
Highest in the ZIP: 2.459 µg/L — LINCOLN CITY OF · 4,257 people · 2019 | 3/3 | SYR4 |
| Arsenic | 1.7045 µg/L 17% of the EPA limit 10 µg/L Main supplier: BISMARCK CITY OF · 72,417 people · 2017 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set Main supplier: BISMARCK CITY OF · 72,417 people · 2019
Highest in the ZIP: 1.467 µg/L — SOUTH CENTRAL REGIONAL WATER DISTRICT · 3,700 people · 2019 | 2/3 | SYR4 |
| Selenium | 1.23 µg/L 2.5% of the EPA limit 50 µg/L Main supplier: BISMARCK CITY OF · 72,417 people · 2017 | 1/3 | SYR4 |
| Dichloromethane | 1.1 µg/L 22% of the EPA limit 5 µg/L Main supplier: BISMARCK CITY OF · 72,417 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.074 pCi/L 21% of the EPA limit 5 pCi/L Main supplier: BISMARCK CITY OF · 72,417 people · 2017 | 1/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 0.4370 pCi/L 2.9% of the EPA limit 15 pCi/L Main supplier: BISMARCK CITY OF · 72,417 people · 2017 | 1/3 | SYR4 |
| Combined Uranium | 0.0950 µg/L 0.3% of the EPA limit 30 µg/L Main supplier: BISMARCK CITY OF · 72,417 people · 2017 | 1/3 | SYR4 |
| Pentachlorophenol | 0.0300 µg/L 3% of the EPA limit 1 µg/L Main supplier: BISMARCK CITY OF · 72,417 people · 2019 | 1/3 | SYR4 |
| Pfba | 0.0059 µg/L No EPA limit set Highest in the ZIP: SOUTH CENTRAL REGIONAL WATER DISTRICT · 3,700 people · 2023 | 1/3 | UCMR-5 |
| Lead | 0.0028 mg/L 19% of the EPA limit 0.0150 mg/L Main supplier: BISMARCK CITY OF · 72,417 people · 2024 | 3/3 | 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 58504
| Supplier | State | Population served |
|---|---|---|
| BISMARCK CITY OF | ND | 72,417 |
| LINCOLN CITY OF | ND | 4,257 |
| SOUTH CENTRAL REGIONAL WATER DISTRICT | ND | 3,700 |
Frequently asked questions about ZIP 58504 tap water
Is the tap water in ZIP 58504 safe to drink?
EPA testing detected 27 contaminants across the water suppliers serving ZIP 58504. 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 58504?
3 public water suppliers report EPA drinking-water monitoring for ZIP 58504. Each is listed above with its population served.
What contaminants are in ZIP 58504's water?
EPA monitoring detected Fluoride, Nitrate-Nitrite, Lead, Copper, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.