Mahopac Falls, NY: High Radon Risk — 62/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-04
Mahopac Falls water quality is uneven — some service areas show clean compliance; others carry documented violations in NY EPA records.
How Mahopac Falls Compares
Data: EPA SDWIS Last verified: 2026-06-04
Mahopac Falls Water: The Quick Version
- Estimated remediation: $2,400 per household.
- CDC health risk index: 10.88.
Water Systems Serving Mahopac Falls
One utility dominates residential water service in Mahopac Falls, NY — out of 1 system in federal records.
Overview
We track water quality and home safety data for 1 ZIP code in Mahopac Falls, New York, covering 1 community water system serving approximately 45 people.
No EPA violations recorded across any ZIP codes in Mahopac Falls — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Mahopac Falls: C (62/100)
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
Mahopac Falls water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Mahopac Falls
- 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 |
|---|---|---|---|
| 10542 | C | Nemarest Club | 45 |
All ZIP Codes in Mahopac Falls
- 10542 [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
Updated daily.
CDC Health Data for Mahopac Falls
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
Climate-Related Water Risk for Mahopac Falls
NFIP data for Mahopac Falls shows a modest claim record and limited flood zone footprint — a combination that places flood exposure well below the threshold where water quality becomes an active planning concern. The connection between flooding and water safety is real during major events anywhere, but it stays in the background here rather than rising to an active local risk factor.
Mahopac Falls has a relatively low flood history with 2 FEMA claims on record. While risk is limited, severe weather events can still impact water infrastructure.
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>$2,400</strong> remediation cost per household.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Mahopac Falls
- 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.
Deep Dive Reports
Detailed analysis for Mahopac Falls, NY