South Windham, CT Water Safety: 53/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
State safety rankings put South Windham, CT near the lower tier — below-average compliance on record.
How South Windham Compares
Data: EPA SDWIS Last verified: 2026-06-03
South Windham Water: The Quick Version
- Homes built before 1986: 95% — older plumbing may contain lead solder.
- Estimated remediation: $400 per household.
Water Systems Serving South Windham
Water service in South Windham, CT is split across 2 utilities out of 2 tracked federally, each operating its own infrastructure and compliance record.
Overview
We track water quality and home safety data for 1 ZIP code in South Windham, Connecticut (population ~278), covering 2 community water systems serving approximately 21,526 people region-wide.
No EPA violations recorded across any ZIP codes in South Windham — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for South Windham: D (53/100)
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
South Windham water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for South Windham
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate 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 |
|---|---|---|---|
| 06266 | D | Windham Water Works | 21,214 |
All ZIP Codes in South Windham
- 06266 [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 South Windham's Housing Stock?
With 95% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Federal plumbing rules changed in two stages — lead pipes were phased out before 1970, and lead solder was banned in 1986 — but in South Windham, where the median build year is 1948, most of the housing was already in place before those rules took effect. The materials installed under older standards remain embedded in a substantial portion of the residential inventory today.
Over half of homes in South Windham were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
South Windham: Remediation Cost in Perspective
Within the South Windham market, estimated remediation claims a small portion of typical property equity — the financial burden is proportionally low.
Remediation costs in South Windham are relatively low compared to home values. The $0–$800 estimated range is a small fraction of median property value. Home values are 45% below the Connecticut average.
Protecting Children from Lead in South Windham
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 utility-side compliance with federal Lead and Copper requirements remains the system reference, that compliance does not extend down into interior plumbing. With 95% of South Windham stock built before the solder ban and aggregate readings at or beyond the action mark, a household-level sample becomes the practical way to close that information gap.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in South Windham
- 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 95% 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 South Windham, CT