Cobalt, ID: High Radon Risk — 40/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Public water data for Cobalt, ID shows a low safety grade — health-based violations appear across a meaningful share of service areas in current EPA records.
How Cobalt Compares
Data: EPA SDWIS Last verified: 2026-06-03
Cobalt Water: The Quick Version
- Estimated remediation: $1,200 per household.
- CDC health risk index: 14.15 — above typical levels.
Water Systems Serving Cobalt
With one provider handling most of Cobalt's residential supply in ID, water service accountability is concentrated in a single utility among the 1 system on record.
Overview
We track water quality and home safety data for 1 ZIP code in Cobalt, Idaho, covering 1 community water system serving approximately 3,158 people.
No EPA violations recorded across any ZIP codes in Cobalt — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Cobalt: D (40/100)
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
Cobalt water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Cobalt
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 83229 | D | SALMON CITY OF | 3,158 |
All ZIP Codes in Cobalt
- 83229 [D]
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.
CDC Health Data for Cobalt
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
What You Can Do in Cobalt
- 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. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
- Review your water system's CCR. Your utility publishes an annual Consumer Confidence Report with detailed test results. Request it or find it online.
Deep Dive Reports
Detailed analysis for Cobalt, ID