Curllsville, PA: High Radon Risk — 40/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Water systems serving Curllsville record elevated violation rates against PA benchmarks — residents in affected areas may want to check their local system's current compliance status.
How Curllsville Compares
Data: EPA SDWIS Last verified: 2026-06-03
Curllsville's Water Providers
Curllsville, PA runs on one primary water provider among the 1 federally tracked system. A single utility is responsible for the overwhelming share of residential supply — including the infrastructure, compliance filings, and rate schedules that govern service for most households.
Overview
We track water quality and home safety data for 1 ZIP code in Curllsville, Pennsylvania, covering 1 community water system serving approximately 1,380 people.
No EPA violations recorded across any ZIP codes in Curllsville — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Curllsville: 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
Curllsville water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Curllsville
- 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 |
|---|---|---|---|
| 16221 | D | KNOX WATER WORKS | 1,380 |
All ZIP Codes in Curllsville
- 16221 [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.
What You Can Do in Curllsville
- 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 Curllsville, PA