Mc Allister, MT: High Radon Risk — 40/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
The latest EPA cycle for Mc Allister shows a low safety grade within MT — compliance gaps have persisted over multiple reporting periods, and the city currently holds a low grade in available EPA data.
How Mc Allister Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Mc Allister Residents
- Homes built before 1986: 25% — older plumbing may contain lead solder.
- Estimated remediation: $1,200 per household.
- CDC health risk index: 12.81 — above typical levels.
Mc Allister's Water Providers
Federal drinking water records identify 1 system operating in Mc Allister, MT. One of those systems serves the overwhelming majority of residential addresses, concentrating infrastructure management, rate authority, and EPA compliance reporting within a single organization.
Overview
We track water quality and home safety data for 1 ZIP code in Mc Allister, Montana (population ~467), covering 1 community water system serving approximately 1,400 people region-wide.
No EPA violations recorded across any ZIP codes in Mc Allister — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Mc Allister: 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
Mc Allister water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Mc Allister
- 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 |
|---|---|---|---|
| 59740 | D | ENNIS TOWN OF | 1,400 |
All ZIP Codes in Mc Allister
- 59740 [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.
Mc Allister 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
Mc Allister Infrastructure Age
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
Newer construction dominates Mc Allister's residential inventory, as reflected in a median build year of 2007. The practical implication is that lead-soldered copper plumbing joints — a pre-1986 standard now federally prohibited — are an exception rather than the rule in this city, though they remain present in the older fraction of the housing stock.
Most homes in Mc Allister 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 Mc Allister
For most homeowners in Mc Allister, the estimated cost of water and safety remediation represents a proportionally modest share of what properties are worth — placing this area in the lower tier of the remediation share scale.
Remediation costs in Mc Allister are relatively low compared to home values. The $800–$1,500 estimated range is a small fraction of median property value. Home values are 113% above the Montana average.
Mc Allister: 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.
Although citywide aggregate readings pass cleanly and just 25% of Mc Allister housing comes from the pre-rule era, the difference between what utilities sample and what arrives at one specific faucet remains a structural feature of how monitoring works. Households with kids in the home can find a certified lead-removal filter and a draw-test kit through retailer-verified channels. That step is independent of system-level data.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Mc Allister
- 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 Mc Allister, MT