Coeur D Alene, ID: High Radon Risk — 68/100 (2026)
3 ZIP codes · 8 water systems · Updated 2026-06-04
Recent monitoring in Coeur D Alene shows middle-tier safety for ID — some systems are clean; others have logged EPA violations.
How Coeur D Alene Compares
Data: EPA SDWIS Last verified: 2026-06-04
Key Facts for Coeur D Alene Residents
- Average lead level: 0.002 mg/L.
- Homes built before 1986: 45% — older plumbing may contain lead solder.
- Estimated remediation: $2,600 per household.
- CDC health risk index: 12.05 — above typical levels.
Coeur D Alene's Water Providers
Coeur D Alene, ID draws its residential water from 3 separate providers among the 8 federally tracked systems. Each operates independently, with its own infrastructure, rate structure, and compliance record.
Overview
We track water quality and home safety data for 3 ZIP codes in Coeur D Alene, Idaho, covering 8 community water systems serving approximately 66,633 people.
No EPA violations recorded across any ZIP codes in Coeur D Alene — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Coeur D Alene: C (68/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Coeur D Alene water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0020 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
- Zone 1 (High): 3 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 83814 | C | City of Coeur D Alene | 54,115 |
| 83815 | B | City of Coeur D Alene | 54,115 |
| 83816 | B | City of Coeur D Alene | 54,115 |
All ZIP Codes in Coeur D Alene
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Coeur D Alene Community Health Snapshot
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Coeur D Alene Infrastructure Age
With 45% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Two regulatory milestones define plumbing-era risk in residential housing: 1970, when lead pipes were still commonly installed for service lines, and 1986, when lead solder was banned from new copper plumbing. A median build year of 1983 places Coeur D Alene in the middle zone between those thresholds — with a meaningful share of housing predating both cutoffs. The distribution shown above breaks out those eras explicitly, clarifying where concentrated risk sits across the residential inventory.
Most homes in Coeur D Alene were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
How Remediation Costs Compare in Coeur D Alene
Remediation costs in Coeur D Alene are small relative to typical property values — the cost-to-value ratio here is favorable.
Remediation costs in Coeur D Alene are relatively low compared to home values. The $1,733–$3,533 estimated range is a small fraction of median property value. Home values are 56% above the Idaho average.
Coeur D Alene: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Practically, the structural drivers in Coeur D Alene — 45% pre-rule stock and citywide monitoring at or beyond the regulatory benchmark — make an in-home draw the practical way to translate aggregate averages into the specific conditions at one address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Coeur D Alene: Flood History & Water Damage Risk
NFIP records stretching across multiple decades show Coeur D Alene accumulating 44 claims and carrying 100% of its ZIP codes inside FEMA flood zones — evidence of meaningful exposure that extends beyond isolated incidents. The mechanisms linking flooding to water quality haven't changed: treatment facilities can be overwhelmed, wells can be infiltrated, and distribution systems can experience backflow. For a community at this exposure level, those mechanisms shift from hypothetical to periodically relevant.
Coeur D Alene has a moderate flood history with 44 FEMA claims averaging $7,841 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$2,600</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Coeur D Alene
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. With 45% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Coeur D Alene, ID