Cornwall, CT Water Safety: 83/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
EPA compliance records for Cornwall tell a largely clear story: violation rates are low, health-based exceedances are uncommon, and the city's grade puts it well above average within CT.
How Cornwall Compares
Data: EPA SDWIS Last verified: 2026-06-03
Cornwall Water: The Quick Version
- Average lead level: 0.002 mg/L.
- Homes built before 1986: 77% — older plumbing may contain lead solder.
- Estimated remediation: $400 per household.
Water Systems Serving Cornwall
At present, 2 utilities serve the bulk of Cornwall, CT's residential water connections out of 2 systems active in the area, spread across independent providers with separate infrastructure and compliance obligations.
Overview
We track water quality and home safety data for 1 ZIP code in Cornwall, Connecticut (population ~50), covering 2 community water systems serving approximately 152 people region-wide.
No EPA violations recorded across any ZIP codes in Cornwall — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Cornwall: B (83/100)
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
Cornwall water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0020 mg/L (EPA action level: 0.015 mg/L)
- 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 |
|---|---|---|---|
| 06753 | B | Aquarion-cornwall | 98 |
All ZIP Codes in Cornwall
- 06753 [B]
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 Cornwall's Housing Stock?
With 77% 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
Heavily weighted toward older construction, Cornwall's housing stock carries a median build year of 1901. That profile puts a majority of homes in the era when lead-soldered copper plumbing was standard practice.
Over half of homes in Cornwall 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.
Protecting Children from Lead in Cornwall
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.
Routinely in Cornwall, where 77% of housing predates the solder ban and aggregate utility readings hover near the federal threshold, a faucet-level draw functions as a standard household step for families with small kids.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for Cornwall, CT