Gilman, CT: High Radon Risk — 40/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Unlike better-scoring cities in CT, Gilman records health-based violations across a meaningful portion of its service areas — the overall safety grade is well below average.
How Gilman Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Systems Serving Gilman
While 1 water system appear in federal records for Gilman, CT, one provider supplies the majority of residential connections — making it the central point of infrastructure and compliance accountability for most households.
Overview
We track water quality and home safety data for 1 ZIP code in Gilman, Connecticut (population ~46), covering 1 community water system serving approximately 172 people region-wide.
No EPA violations recorded across any ZIP codes in Gilman — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Gilman: 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
Gilman water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Gilman
- 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 |
|---|---|---|---|
| 06336 | D | CAREFREE HOMEOWNERS ASSOCIATION | 172 |
All ZIP Codes in Gilman
- 06336 [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.
How Old Is Gilman'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
Congress banned lead solder in residential plumbing in 1986, drawing a clear line in housing risk by era. Gilman's median build year of 2008 puts most of its residential stock on the newer side of that boundary — a profile that generally correlates with lower plumbing-sourced lead exposure across the city.
Most homes in Gilman 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.
Gilman: Remediation Cost in Perspective
Because property values in Gilman comfortably exceed estimated remediation costs, the equity impact here is proportionally small.
Remediation costs in Gilman are relatively low compared to home values. The $800–$1,500 estimated range is a small fraction of median property value. Home values are 4% above the Connecticut average.
What You Can Do in Gilman
- 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 Gilman, CT