Tap Water Quality Report
Tap water quality in COEUR D ALENE, Idaho
Tap water in COEUR D ALENE, Idaho receives a grade of D (67/100) from TapWaterSafety.org. It's served by COEUR D ALENE CITY OF. The most significant water quality concerns are: Arsenic significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in COEUR D ALENE's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving COEUR D ALENE.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 4.77 ppb, 1192x above the EWG health guideline of 0.004 ppb.
Recommended filters for COEUR D ALENE
Filters matched to the specific contaminants in COEUR D ALENE's 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.
All contaminants detected in COEUR D ALENE'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 |
4.77 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 1192× over |
| Nitrate and nitrite Inorganic |
1.29 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 9.2× over |
| Chromium (hexavalent) Heavy metal |
0.167 ppb | 0.02 | — | — | — | — | — | 8.3× over |
| Nitrate Inorganic |
0.849 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 6.1× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
0.61 ppb | 0.15 | 80.0 | 100 | — | — | — | 4.1× over |
| Uranium Radiological |
1.52 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 3.5× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
0.151 ppb | 0.06 | — | — | — | — | — | 2.5× over |
| Radium, combined (-226 and -228) Radiological |
0.05 pCi/L | 0.05 | 5.0 | — | — | — | — | Below guideline |
| Manganese Heavy metal |
10.1 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Barium Heavy metal |
35.0 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Chlorate Disinfection byproduct |
5.55 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.167 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Cobalt Other |
0.0265 ppb | 70.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0932 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Germanium Other |
0.02 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 COEUR D ALENE CITY OF.