Cohagen, MT: High Radon Risk — 40/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Although conditions vary by service area, Cohagen's water systems collectively show below-average compliance within MT — health-based violations are documented throughout the city, and the overall grade reflects a pattern rather than isolated incidents.
How Cohagen Compares
Data: EPA SDWIS Last verified: 2026-06-03
Cohagen Water: The Quick Version
- Homes built before 1986: 38% — older plumbing may contain lead solder.
- Estimated remediation: $1,200 per household.
- CDC health risk index: 13.71 — above typical levels.
Water Systems Serving Cohagen
A single utility carries the primary residential water load in Cohagen, MT — the dominant provider across 1 federally tracked system.
Overview
We track water quality and home safety data for 1 ZIP code in Cohagen, Montana (population ~121), covering 1 community water system serving approximately 364 people region-wide.
No EPA violations recorded across any ZIP codes in Cohagen — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Cohagen: 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
Cohagen water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Cohagen
- 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 |
|---|---|---|---|
| 59322 | D | JORDAN TOWN OF | 364 |
All ZIP Codes in Cohagen
- 59322 [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 Cohagen
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
How Old Is Cohagen's Housing Stock?
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Development in Cohagen unfolded across multiple decades, and the median build year of 1999 reflects a housing inventory where eras of construction are genuinely mixed — including portions that predate the federal prohibition on lead solder in plumbing.
Most homes in Cohagen 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.
Protecting Children from Lead in Cohagen
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.
Wherever 38% of local housing was built before solder rules changed — as is the case in Cohagen — a faucet-level sample closes the gap that aggregate utility data cannot.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Cohagen
- 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 38% of homes built before 1986, lead solder is a real possibility.
- 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 Cohagen, MT