Water Quality Report · Updated May 12, 2026
IDAHO FALLS CITY OF
IDAHO FALLS CITY OF delivers tap water graded D (63/100) by TapWaterSafety.org. The utility serves approximately 69,450 residents in IDAHO FALLS, Idaho using groundwater. The most significant water quality concerns are: Arsenic significantly above health guideline; Bromodichloromethane significantly above health guideline; Chromium (hexavalent) significantly above health guideline. For questions, the utility can be reached at 208-612-8472.
Is IDAHO FALLS tap water safe to drink?
IDAHO FALLS CITY OF delivers tap water that earns a grade of D (63/100) from TapWaterSafety.org — a below-average rating, with multiple concerns including arsenic significantly above health guideline.
The utility serves 69,450 residents in IDAHO FALLS, drawing from groundwater.
Public testing data identifies 13 contaminants in this water above EWG's health-based guidelines, including: Arsenic, Bromodichloromethane, Chromium (hexavalent), Total trihalomethanes (TTHMs), Dibromochloromethane, Haloacetic acids (HAA9), Nitrate, Nitrate and nitrite, Haloacetic acids (HAA5), Radium, combined (-226 and -228), Chloroform, Bromoform, 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.
Quick actions for IDAHO FALLS residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for IDAHO FALLS CITY OF.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 2.0 ppb, 500x above the EWG health guideline of 0.004 ppb.
Bromodichloromethane significantly above health guideline
Moderate concernBromodichloromethane detected at 2.4 ppb, 40x above the EWG health guideline of 0.06 ppb.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 0.723 ppb, 36x above the EWG health guideline of 0.02 ppb.
Contact IDAHO FALLS 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 IDAHO FALLS
Filters matched to the specific contaminants in this water supply.
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.
Score breakdown
This utility's overall score of 63/100 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 |
|---|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
2.0 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 500× over |
| Bromodichloromethane Disinfection byproduct |
2.4 ppb | 0.06 | — | — | — | — | — | 40× over |
| Chromium (hexavalent) Heavy metal |
0.723 ppb | 0.02 | — | — | — | — | — | 36× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
4.43 ppb | 0.15 | 80.0 | 100 | — | — | — | 30× over |
| Dibromochloromethane Disinfection byproduct |
2.9 ppb | 0.1 | — | — | — | — | — | 29× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
0.975 ppb | 0.06 | — | — | — | — | — | 16× over |
| Nitrate Inorganic |
1.86 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 13× over |
| Nitrate and nitrite Inorganic |
1.89 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 13× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
0.561 ppb | 0.1 | 60.0 | 60 | — | — | — | 5.6× over |
| Radium, combined (-226 and -228) Radiological |
0.22 pCi/L | 0.05 | 5.0 | — | — | — | — | 4.4× over |
| Chloroform Disinfection byproduct |
1.4 ppb | 0.4 | — | — | — | — | — | 3.5× over |
| Bromoform Disinfection byproduct |
1.2 ppb | 0.5 | — | — | — | — | — | 2.4× over |
| Uranium Radiological |
0.94 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 2.2× over |
| Barium Heavy metal |
100.0 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Vanadium Other |
2.89 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
1.89 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Molybdenum Other |
0.139 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Cobalt Other |
0.0444 ppb | 70.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.426 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.4 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
44.7 ppb | — | — | — | — | — | — | Below guideline |
| o-toluidine Other |
0.00113 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.
IDAHO FALLS CITY OF service area
This water system serves 1 community in Bonneville County, Idaho. Click any city for its dedicated tap water quality page.
Find the right filter for IDAHO FALLS water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.