Tap Water Quality Report
Tap water quality in BISMARCK, North Dakota
Tap water in BISMARCK, North Dakota receives a grade of C (76/100) from TapWaterSafety.org. It's served by BISMARCK CITY OF. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Bromodichloromethane significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in BISMARCK's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving BISMARCK.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 13.8 ppb, 230x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 29.8 ppb, 199x above the EWG health guideline of 0.15 ppb.
Bromodichloromethane significantly above health guideline
Moderate concernBromodichloromethane detected at 8.69 ppb, 145x above the EWG health guideline of 0.06 ppb.
EPA compliance record
Official U.S. EPA records for BISMARCK CITY OF (system ID ND0800080) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for BISMARCK
Filters matched to the specific contaminants in BISMARCK's water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in BISMARCK's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
13.8 ppb | 0.06 | — | — | — | — | — | 230× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
29.8 ppb | 0.15 | 80.0 | 100 | — | — | — | 199× over |
| Bromodichloromethane Disinfection byproduct |
8.69 ppb | 0.06 | — | — | — | — | — | 145× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
10.1 ppb | 0.1 | 60.0 | 60 | — | — | — | 101× over |
| Dibromochloromethane Disinfection byproduct |
4.64 ppb | 0.1 | — | — | — | — | — | 46× over |
| Dibromoacetic acid Disinfection byproduct |
1.28 ppb | 0.03 | — | — | — | — | — | 43× over |
| Chloroform Disinfection byproduct |
15.9 ppb | 0.4 | — | — | — | — | — | 40× over |
| Dichloroacetic acid Disinfection byproduct |
6.76 ppb | 0.2 | — | — | — | — | — | 34× over |
| Chromium (hexavalent) Heavy metal |
0.563 ppb | 0.02 | — | — | — | — | — | 28× over |
| Trichloroacetic acid Disinfection byproduct |
2.07 ppb | 0.1 | — | — | — | — | — | 21× over |
| Bromoform Disinfection byproduct |
0.61 ppb | 0.5 | — | — | — | — | — | 1.2× over |
| Nitrate and nitrite Inorganic |
0.0213 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Molybdenum Other |
3.3 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
1.42 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.0211 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.334 ppb | 1500.0 | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from BISMARCK CITY OF.