Water Quality Report · Updated October 07, 2026
COEUR D ALENE CITY OF
COEUR D ALENE CITY OF delivers tap water graded B (79/100) by TapWaterSafety.org. The utility serves approximately 54,115 residents in COEUR D ALENE, Idaho using groundwater. The most significant water quality concerns are: Arsenic significantly above health guideline. For questions, the utility can be reached at 208-769-2211.
Is COEUR D ALENE tap water safe to drink?
COEUR D ALENE CITY OF delivers tap water that earns a grade of B (79/100) from TapWaterSafety.org — a good rating, with only minor concerns relative to health-based guidelines.
The utility serves 54,115 residents in COEUR D ALENE, drawing from groundwater.
Public testing data identifies 7 contaminants in this water above EWG's health-based guidelines, including: Arsenic, Nitrate and nitrite, Chromium (hexavalent), Nitrate, Total trihalomethanes (TTHMs), Uranium, Haloacetic acids (HAA9). 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 COEUR D ALENE CITY OF (system ID ID1280053) 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.
Quick actions for COEUR D ALENE residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for COEUR D ALENE CITY OF.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 4.77 ppb, 1192x above the EWG health guideline of 0.004 ppb.
Contact COEUR D ALENE 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 COEUR D ALENE
Filters matched to the specific contaminants in this 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.
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 79/100 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 |
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 (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
COEUR D ALENE CITY OF service area
This water system serves 1 community in Kootenai County, Idaho. Click any city for its dedicated tap water quality page.
Find the right filter for COEUR D ALENE water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.