Tap Water Quality Report
Tap water quality in BOZEMAN, Montana
Tap water in BOZEMAN, Montana receives a grade of D (67/100) from TapWaterSafety.org. It's served by BOZEMAN CITY OF. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Arsenic detected. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in BOZEMAN's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving BOZEMAN.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 18.5 ppb, 308x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 17.0 ppb, 170x above the EWG health guideline of 0.1 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 22.8 ppb, 152x above the EWG health guideline of 0.15 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.281 ppb.
Recommended filters for BOZEMAN
Filters matched to the specific contaminants in BOZEMAN's water supply.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
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 BOZEMAN'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 |
18.5 ppb | 0.06 | — | — | — | — | — | 308× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
17.0 ppb | 0.1 | 60.0 | 60 | — | — | — | 170× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
22.8 ppb | 0.15 | 80.0 | 100 | — | — | — | 152× over |
| Trichloroacetic acid Disinfection byproduct |
8.43 ppb | 0.1 | — | — | — | — | — | 84× over |
| Arsenic Heavy metal |
0.281 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 70× over |
| Chloroform Disinfection byproduct |
21.6 ppb | 0.4 | — | — | — | — | — | 54× over |
| Dichloroacetic acid Disinfection byproduct |
8.6 ppb | 0.2 | — | — | — | — | — | 43× over |
| Bromodichloromethane Disinfection byproduct |
1.2 ppb | 0.06 | — | — | — | — | — | 20× over |
| Bromochloroacetic acid Disinfection byproduct |
0.126 ppb | 0.02 | — | — | — | — | — | 6.3× over |
| Chromium (hexavalent) Heavy metal |
0.116 ppb | 0.02 | — | — | — | — | — | 5.8× over |
| Uranium Radiological |
0.37 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | Below guideline |
| Nitrate and nitrite Inorganic |
0.0872 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Dibromoacetic acid Disinfection byproduct |
0.0166 ppb | 0.03 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
46.9 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
4.2 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Barium Heavy metal |
22.4 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Vanadium Other |
0.449 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Selenium Heavy metal |
0.37 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Molybdenum Other |
0.171 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.0238 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0805 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.536 ppm | — | 4.0 | 1.5 | 1.5 | — | — | 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 BOZEMAN CITY OF.