Tap Water Quality Report
Tap water quality in Boise, Idaho
Tap water in Boise, Idaho receives a grade of D (60/100) from TapWaterSafety.org. It's served by VEOLIA WATER IDAHO. The most significant water quality concerns are: Arsenic significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in Boise's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving Boise.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 2.71 ppb, 678x above the EWG health guideline of 0.004 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 29.9 ppb, 498x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 27.6 ppb, 276x above the EWG health guideline of 0.1 ppb.
EPA compliance record
Official U.S. EPA records for VEOLIA WATER IDAHO (system ID ID4010016) 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 Boise
Filters matched to the specific contaminants in Boise's water supply.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
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 Boise'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 |
|---|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
2.71 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 678× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
29.9 ppb | 0.06 | — | — | — | — | — | 498× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
27.6 ppb | 0.1 | 60.0 | 60 | — | — | — | 276× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
32.1 ppb | 0.15 | 80.0 | 100 | — | — | — | 214× over |
| Trichloroacetic acid Disinfection byproduct |
18.1 ppb | 0.1 | — | — | — | — | — | 181× over |
| Chloroform Disinfection byproduct |
33.0 ppb | 0.4 | — | — | — | — | — | 83× over |
| Dichloroacetic acid Disinfection byproduct |
13.8 ppb | 0.2 | — | — | — | — | — | 69× over |
| Bromodichloromethane Disinfection byproduct |
3.95 ppb | 0.06 | — | — | — | — | — | 66× over |
| Chromium (hexavalent) Heavy metal |
0.429 ppb | 0.02 | — | — | — | — | — | 21× over |
| Dibromoacetic acid Disinfection byproduct |
0.311 ppb | 0.03 | — | — | — | — | — | 10× over |
| Uranium Radiological |
4.47 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 10× over |
| Dibromochloromethane Disinfection byproduct |
0.954 ppb | 0.1 | — | — | — | — | — | 9.5× over |
| Nitrate Inorganic |
1.14 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 8.1× over |
| Radium, combined (-226 and -228) Radiological |
0.3 pCi/L | 0.05 | 5.0 | — | — | — | — | 5.9× over |
| Tetrachloroethylene (perchloroethylene) Volatile organic compound |
0.175 ppb | 0.06 | 5.0 | — | — | — | — | 2.9× over |
| Bromoform Disinfection byproduct |
0.555 ppb | 0.5 | — | — | — | — | — | 1.1× over |
| Manganese Heavy metal |
51.7 ppb | 100.0 | — | 50 | 80 | — | — | Fails EU |
| Chlorate Disinfection byproduct |
60.3 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Trichloroethylene Volatile organic compound |
0.0412 ppb | 0.4 | 5.0 | 10 | 20 | 1.7 | — | Below guideline |
| Vanadium Other |
1.44 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
2.14 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Atrazine Pesticide/Herbicide |
0.00161 ppb | 0.1 | 3.0 | 0.1 | 100 | 0.15 | — | Below guideline |
| Barium Heavy metal |
11.1 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.00542 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Selenium Heavy metal |
0.229 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.146 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Dichloromethane (methylene chloride) Volatile organic compound |
0.0084 ppb | 4.0 | 5.0 | — | — | — | — | Below guideline |
| Di(2-ethylhexyl) phthalate Semi-volatile organic compound |
0.00432 ppb | 3.0 | 6.0 | — | — | — | — | Below guideline |
| Strontium Radiological |
0.193 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| 1,1-Dichloroethylene Volatile organic compound |
0.01 ppb | — | 7.0 | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
0.257 ppb | — | 100.0 | — | — | — | — | Below guideline |
| cis-1,2-Dichloroethylene Volatile organic compound |
0.0134 ppb | — | 70.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.479 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.0656 ppb | — | — | — | — | — | — | Below guideline |
| Lithium Other |
11.7 ppb | — | — | — | — | — | — | 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 VEOLIA WATER IDAHO.