Cornwall On Hudson, NY: High Radon Risk — 45/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Cornwall On Hudson, NY: water systems collectively below average — violations documented.
How Cornwall On Hudson Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Cornwall On Hudson Residents
- Homes built before 1986: 87% — older plumbing may contain lead solder.
- Estimated remediation: $2,900 per household.
- CDC health risk index: 11.77.
Cornwall On Hudson's Water Providers
Federal records track 1 water system in Cornwall On Hudson, NY, and a single provider handles the dominant share of residential connections while carrying primary responsibility for EPA compliance.
Overview
We track water quality and home safety data for 1 ZIP code in Cornwall On Hudson, New York, covering 1 community water system serving approximately 3,088 people.
No EPA violations recorded across any ZIP codes in Cornwall On Hudson — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Cornwall On Hudson: D (45/100)
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 On Hudson water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Cornwall On Hudson
- 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 |
|---|---|---|---|
| 12520 | D | FIRTHCLIFFE W.D. | 450 |
All ZIP Codes in Cornwall On Hudson
- 12520 [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.
Cornwall On Hudson 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
Cornwall On Hudson Infrastructure Age
With 87% 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
The character of Cornwall On Hudson's housing stock is one of deep historical layering — a median build year of 1948 signals a city built largely before the plumbing era changes of 1986 and 1970. Lead-soldered copper joints and, in the oldest properties, lead service lines are commonly present in this inventory. That context shapes what individual water testing may reveal, particularly in neighborhoods where the oldest housing is concentrated.
Over half of homes in Cornwall On Hudson 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.
How Remediation Costs Compare in Cornwall On Hudson
In Cornwall On Hudson, the equity impact of remediation is proportionally small — not the kind of financial commitment that rises to the level of a genuine planning constraint, but a minor share of what most properties here are worth.
Remediation costs in Cornwall On Hudson are relatively low compared to home values. The $1,900–$4,100 estimated range is a small fraction of median property value. Home values are 27% above the New York average.
Cornwall On Hudson: 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.
Older interior plumbing shapes the local picture: 87% of Cornwall On Hudson homes predate the federal solder ban, and aggregate sampling either approaches or crosses the action benchmark. That mix makes a single-home draw a standard pre-purchase or pre-occupancy step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Cornwall On Hudson: Flood History & Water Damage Risk
Across the NFIP's long tracking period, Cornwall On Hudson shows 24 claims and 100% of ZIP codes within FEMA-designated flood zones — figures that place it in moderate flood exposure territory. At this level, the water-quality implications of flooding — contaminated wells, stressed treatment intake, distribution backflow — move from theoretical edge cases to genuine periodic risks, particularly during higher-severity events.
Cornwall On Hudson has a moderate flood history with 24 FEMA claims averaging $12,273 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
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. Flood damage can add significantly to the estimated <strong>$2,900</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Cornwall On Hudson
- 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 87% 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 Cornwall On Hudson, NY