Tap Water Quality Report
Tap water quality in POCATELLO, Idaho
Tap water in POCATELLO, Idaho receives a grade of C (72/100) from TapWaterSafety.org. It's served by POCATELLO CITY OF. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Chromium (hexavalent) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in POCATELLO's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving POCATELLO.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 3.46 ppb, 58x above the EWG health guideline of 0.06 ppb.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 0.8 ppb, 40x above the EWG health guideline of 0.02 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 5.81 ppb, 39x above the EWG health guideline of 0.15 ppb.
Recommended filters for POCATELLO
Filters matched to the specific contaminants in POCATELLO's water supply.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
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 POCATELLO'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 |
3.46 ppb | 0.06 | — | — | — | — | — | 58× over |
| Chromium (hexavalent) Heavy metal |
0.8 ppb | 0.02 | — | — | — | — | — | 40× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
5.81 ppb | 0.15 | 80.0 | 100 | — | — | — | 39× over |
| Nitrate Inorganic |
3.91 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 28× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
2.44 ppb | 0.1 | 60.0 | 60 | — | — | — | 24× over |
| Radium, combined (-226 and -228) Radiological |
1.14 pCi/L | 0.05 | 5.0 | — | — | — | — | 23× over |
| Uranium Radiological |
1.24 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 2.9× over |
| Tetrachloroethylene (perchloroethylene) Volatile organic compound |
0.0365 ppb | 0.06 | 5.0 | — | — | — | — | Below guideline |
| Barium Heavy metal |
128.0 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Trichloroethylene Volatile organic compound |
0.0339 ppb | 0.4 | 5.0 | 10 | 20 | 1.7 | — | Below guideline |
| Vanadium Other |
1.59 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
3.86 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.075 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Strontium Radiological |
0.38 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
2.0 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Lithium Other |
38.6 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 POCATELLO CITY OF.