Water Quality Report · Updated October 07, 2026
POCATELLO CITY OF
POCATELLO CITY OF delivers tap water graded B (78/100) by TapWaterSafety.org. The utility serves approximately 58,231 residents in POCATELLO, Idaho using groundwater. 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. For questions, the utility can be reached at 208-234-6174.
Is POCATELLO tap water safe to drink?
POCATELLO CITY OF delivers tap water that earns a grade of B (78/100) from TapWaterSafety.org — a good rating, with only minor concerns relative to health-based guidelines.
The utility serves 58,231 residents in POCATELLO, drawing from groundwater.
Public testing data identifies 7 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Chromium (hexavalent), Total trihalomethanes (TTHMs), Nitrate, Haloacetic acids (HAA5), Radium, combined (-226 and -228), Uranium. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for POCATELLO CITY OF (system ID ID6030043) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Ground Water Rule | Missed testing or reporting | 10/09/2023 | Open |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Missed testing or reporting | 04/01/2025 | Open |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for POCATELLO residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for POCATELLO CITY OF.
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.
Contact POCATELLO CITY OF
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for POCATELLO
Filters matched to the specific contaminants in this 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.
Score breakdown
This utility's overall score of 78/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). 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 (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
POCATELLO CITY OF service area
This water system serves 1 community in Bannock County, Idaho. Click any city for its dedicated tap water quality page.
Find the right filter for POCATELLO water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.