Radium in Harleysville, PA Drinking Water
Radium data for Harleysville, Pennsylvania · 12,900 residents · 2 ZIP codes
For residents of Harleysville, Pennsylvania, Radium has appeared in public water supply sampling data.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-05-14
Radium in Harleysville Tap Water
Radium has been detected in Harleysville, Pennsylvania drinking water at a maximum level of 8.26 pCi/L — 1.65x the EPA MCL.
This analysis covers 12,900 residents across 2 ZIP codes in Harleysville.
Harleysville's overall water quality grade is D (43/100).
Is Radium in Harleysville Water Safe?
Radium was detected in Harleysville water but currently falls within EPA limits. However, some health organizations argue the EPA MCL may not be protective enough.
If you are concerned, a reverse osmosis or ion exchange filter can reduce radium levels further.
Radium Levels by ZIP Code
| ZIP Code | Radium Level | EPA Limit | Status |
|---|---|---|---|
| 19438 | 8.26 pCi/L | 5 pCi/L (combined Ra-226 + Ra-228) | Exceeds limit |
Average radium level across Harleysville: 8.26 pCi/L
Health Effects of Radium
- Increased risk of bone cancer (radium accumulates in bones)
- The body treats radium like calcium, storing it in bones
- Lifetime cancer risk of ~1 in 10,000 at 5 pCi/L
- No safe threshold for radioactive contamination
Health risk severity: High. Governed by the Radionuclides Rule.
How Radium Gets Into Drinking Water
- Natural radioactive decay in underground rock formations
- Groundwater sources (especially deep wells)
- Mining and industrial waste
- Higher in regions with specific geology (Midwest, parts of South)
What to Do About Radium in Harleysville Water
- Reverse osmosis (NSF 58 certified) removes 90%+ of radium
- Ion exchange (water softeners) can reduce radium
- Point-of-use RO at kitchen tap is most cost-effective
- GAC filters alone are NOT effective for radium
Look for filters certified under NSF 58 for radium removal.