Hamilton, MT: High Radon Potential Area - Home Safety 67/100
1 ZIP code · 1 water system · Updated
ZipCheckup grade for Hamilton: C.
A mixed picture - some signals here are worth your attention.
Hamilton, MT holds a middle-tier grade; review the underlying water system records for the reasons behind it.
How Hamilton Compares
Data: EPA SDWIS
Hamilton Water: The Quick Version
- Average of reported 90th-percentile lead results: 0.001 mg/L.
- Homes built before 1986: 56% - older plumbing may contain lead solder.
- Estimated remediation: $500 per household.
- Health risk index (ZipCheckup composite of CDC data): 12.93.
Water Systems Serving Hamilton
Listed supplier for Hamilton, MT: one system, of 1 on federal record.
- C
Overview
We track home safety data for 1 ZIP code in Hamilton, Montana, covering 1 community water system serving approximately 14,775 people. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.
The available EPA record reports 0 violations for 1 ZIP code with a reported violation count.
Home Safety Score
Average Home Safety Score for Hamilton: C (67/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Hamilton water systems draw from: Groundwater.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0010 mg/L (EPA action level: 0.015 mg/L)
- 0 of 1 ZIP code with known status exceed the EPA lead action level
Radon Risk
1 of 1 ZIP records with known zones is in EPA Radon Zone 1.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 59840 | C | City of Hamilton | 5,660 |
All ZIP Codes in Hamilton
- 59840 [C]
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
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
CDC Health Data for Hamilton
Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
How Old Is Hamilton's Housing Stock?
With 56% of homes built before 1986, lead solder in plumbing is a potential concern. Federal law banned lead solder in drinking-water plumbing in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Lead can reach tap water from service lines, solder and brass fittings inside a building, which is why housing age draws attention in Hamilton, where the median build year is 1970.
Over half of homes in Hamilton were built before 1986, when federal law began restricting lead solder in drinking-water plumbing. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Hamilton: Remediation Cost in Perspective
Measured against the median home value, the estimated cost of fixing the issues flagged for Hamilton lands in the lowest of the three tiers this page uses.
Estimated remediation costs in Hamilton can be compared with local home values. The $300–$800 estimated range can be set against the median property value; actual costs vary by home. Home values are 35% above the Montana average.
Protecting Children from Lead in Hamilton
Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Historical Flood-Claim Evidence for Hamilton
Historical NFIP data for Hamilton contains 3 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $1,569. Among ZIP codes with claim records, 0% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
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. The $500 remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
What You Can Do in Hamilton
- Test your water at home. City-level data shows averages - your tap may differ. Check the certification, price and turnaround time of any water test kit or lab service.
- Install a certified water filter. Choose a pitcher or under-sink filter certified to reduce the specific contaminants of concern.
- Check your home's plumbing. With 56% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Hamilton, MT