Gwynedd Valley, PA: High Radon Risk — 53/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-04
In recent EPA cycles, Gwynedd Valley shows a persistent below-average water quality pattern within PA — documented violations span multiple service areas and have appeared consistently across reporting periods.
How Gwynedd Valley Compares
Data: EPA SDWIS Last verified: 2026-06-04
What You Should Know About Gwynedd Valley Water
- Homes built before 1986: 60% — older plumbing may contain lead solder.
- Estimated remediation: $3,600 per household.
Who Supplies Your Water in Gwynedd Valley
In Gwynedd Valley, PA, residential water supply is distributed across multiple utilities rather than concentrated in one. The 2 leading providers out of 2 tracked systems each control their own infrastructure, file separate EPA compliance reports, and set independent rate schedules.
Overview
We track water quality and home safety data for 1 ZIP code in Gwynedd Valley, Pennsylvania (population ~625), covering 2 community water systems serving approximately 92,496 people region-wide.
No EPA violations recorded across any ZIP codes in Gwynedd Valley — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Gwynedd Valley: D (53/100)
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
Gwynedd Valley water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Gwynedd Valley
- 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 |
|---|---|---|---|
| 19437 | D | NORTH WALES WATER AUTHORITY | 72,496 |
All ZIP Codes in Gwynedd Valley
- 19437 [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.
Housing & Infrastructure in Gwynedd Valley
With 60% 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
For residents trying to assess tap water risk in Gwynedd Valley, the median build year of 1985 is the starting context. It signals that a majority of homes were constructed before 1986 — the year federal rules prohibited lead solder in new plumbing — and that a significant share likely predates 1970, when lead pipes were still a common choice for residential service connections. Neither risk tier is rare in this housing inventory.
Over half of homes in Gwynedd Valley 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.
Lead Exposure Risk for Children in Gwynedd Valley
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.
Practically, the structural drivers in Gwynedd Valley — 60% pre-rule stock and citywide monitoring at or beyond the regulatory benchmark — make an in-home draw the practical way to translate aggregate averages into the specific conditions at one address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Gwynedd Valley
Flood exposure in Gwynedd Valley is meaningful by NFIP measures — 6 claims on record and 100% of ZIP codes carrying FEMA flood zone designations. That level of activity makes flood history a relevant factor when evaluating local water quality over time.
Gwynedd Valley has a moderate flood history with 6 FEMA claims averaging $22,539 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>$3,600</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 Gwynedd Valley
- 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 60% 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 Gwynedd Valley, PA