Compliance record
Other contaminants detected
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 this
system's samples — over 100% is worth reading, but is not by itself a
violation. Where a single sample came in higher than that percentile, it
is noted under the bar. Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 72.6885 µg/L 91% of the EPA limit 80 µg/L
worst single sample: 142.5 µg/L | 244/244 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 21.079 µg/L 35% of the EPA limit 60 µg/L
worst single sample: 32.1 µg/L | 244/244 | SYR4 | 2012–2019 |
| Bromodichloromethane | 18.306 µg/L No EPA limit set
worst single sample: 26.41 µg/L | 242/242 | SYR4 | 2012–2019 |
| Chloroform | 52.885 µg/L No EPA limit set
worst single sample: 105.8 µg/L | 242/242 | SYR4 | 2012–2019 |
| Dibromochloromethane | 8.33 µg/L No EPA limit set
worst single sample: 13.17 µg/L | 241/242 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 13.7 µg/L No EPA limit set
worst single sample: 21 µg/L | 241/242 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 7.595 µg/L No EPA limit set
worst single sample: 11 µg/L | 226/242 | SYR4 | 2012–2019 |
| Lead | 15.32 µg/L 102% of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 186.8 µg/L | 159/259 | SYR4 | 2013–2019 |
| Dibromoacetic Acid | 2.43 µg/L No EPA limit set
worst single sample: 8.68 µg/L | 131/242 | SYR4 | 2012–2019 |
| Copper | 136 µg/L 10% of the EPA limit 1300 µg/L
worst single sample: 350 µg/L | 65/257 | SYR4 | 2013–2019 |
| Bromoform | 2.958 µg/L No EPA limit set
worst single sample: 3.57 µg/L | 63/242 | SYR4 | 2012–2019 |
| Lead | 0.0028 mg/L 19% of the EPA limit 0.0150 mg/L | 21/21 | LCR | 2024 |
| Nitrate-Nitrite | 320 µg/L 3.2% of the EPA limit 10000 µg/L | 16/18 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 2.408 µg/L No EPA limit set
worst single sample: 2.48 µg/L | 13/242 | SYR4 | 2012–2019 |
| Lithium | 40.9 µg/L No EPA limit set | 4/4 | UCMR-5 | 2025 |
| Barium | 19.59 µg/L 1% of the EPA limit 2000 µg/L
worst single sample: 19.7 µg/L | 3/3 | SYR4 | 2015–2017 |
| Combined Radium (-226 And -228) | 1.074 pCi/L 21% of the EPA limit 5 pCi/L
worst single sample: 1.17 pCi/L | 3/3 | SYR4 | 2015–2017 |
| Fluoride | 758 µg/L 19% of the EPA limit 4000 µg/L
worst single sample: 760 µg/L | 3/3 | SYR4 | 2015–2017 |
| Arsenic | 1.7045 µg/L 17% of the EPA limit 10 µg/L
worst single sample: 1.73 µg/L | 2/4 | SYR4 | 2014–2017 |
| Combined Uranium | 0.0950 µg/L 0.3% of the EPA limit 30 µg/L
worst single sample: 0.1400 µg/L | 2/3 | SYR4 | 2015–2017 |
| Gross Alpha, Excl. Radon And U | 0.4370 pCi/L 2.9% of the EPA limit 15 pCi/L
worst single sample: 0.4400 pCi/L | 2/3 | SYR4 | 2015–2017 |
| Cyanide | 66 µg/L 33% of the EPA limit 200 µg/L | 1/1 | SYR4 | 2015 |
| Dichloromethane | 1.1 µg/L 22% of the EPA limit 5 µg/L | 1/6 | SYR4 | 2015–2019 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set | 1/242 | SYR4 | 2012–2019 |
| Pentachlorophenol | 0.0300 µg/L 3% of the EPA limit 1 µg/L | 1/3 | SYR4 | 2015–2019 |
| Selenium | 1.23 µg/L 2.5% of the EPA limit 50 µg/L | 1/3 | SYR4 | 2015–2017 |
81 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Bismarck City of
Is Bismarck City of tap water safe to drink?
EPA monitoring detected 26 contaminants in Bismarck City of's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Bismarck City of's water?
EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Bromodichloromethane, Chloroform, Dibromochloromethane, and others. The full list with the level and data source for each is above.
How many people does Bismarck City of serve?
Bismarck City of reports serving 72,417 people in North Dakota, per its EPA record.
Has Bismarck City of had any water quality violations?
The EPA has no formal drinking-water violations on file for Bismarck City of.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.