Williamstown, PA: 12 Violations — 46/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
In recent EPA cycles, Williamstown shows a persistent below-average water quality pattern within PA — documented violations span multiple service areas and have appeared consistently across reporting periods.
How Williamstown Compares
Data: EPA SDWIS Last verified: 2026-06-03
Williamstown Water: The Quick Version
- Your city's water systems recorded 12 violations in the past 5 years.
- Homes built before 1986: 94% — older plumbing may contain lead solder.
- Estimated remediation: $1,200 per household.
Water Systems Serving Williamstown
Federal records list 1 water system serving Williamstown, PA. One provider accounts for the large majority of residential water connections in the area, concentrating infrastructure and compliance accountability.
Overview
We track water quality and home safety data for 1 ZIP code in Williamstown, Pennsylvania, covering 1 community water system serving approximately 2,521 people.
1 of 1 ZIP code (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Williamstown: D (46/100)
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
Williamstown water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Williamstown
- 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.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Revised Total Coliform Rule | Microbiological | 6 | 1 |
| E. coli | Microbiological | 6 | 1 |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 4 | 1 |
| Consumer Confidence Report Rule | Reporting | 4 | 1 |
| Chlorite | Disinfection Byproducts | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 17098 | D | 12 | 0 | Williamstown Boro Authority |
All ZIP Codes in Williamstown
- 17098 [D] — 12 violations
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.
Key Contaminants Detected in Williamstown
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Williamstown's Housing Stock?
With 94% 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
Housing age is one of the most reliable proxies for plumbing-era lead risk, because two federal milestones — the widespread use of lead pipes before 1970 and the continued use of lead solder until 1986 — define the highest-risk tiers of the residential housing stock. With a median build year of 1901, Williamstown falls squarely within the older range — meaning a large fraction of the housing was built under the plumbing standards of those earlier eras. The distribution above captures where that risk concentrates, and why older neighborhoods warrant particular attention from residents concerned about tap water quality.
Over half of homes in Williamstown 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.
Williamstown: Remediation Cost in Perspective
Middle of the range — Williamstown homeowners face a remediation share that calls for real financial attention without reaching crisis territory.
Remediation costs are moderate relative to home values in Williamstown. The estimated $800–$1,500 range is manageable for most homeowners but still worth budgeting for. Home values are 47% below the Pennsylvania average.
Protecting Children from Lead in Williamstown
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.
In recent monitoring under the Lead and Copper Rule, citywide samples for Williamstown have approached or crossed the regulatory action level on multiple occasions. Combined with 94% of stock dating from the pre-rule era, the picture supports baseline single-tap reads as a standard household-level step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Williamstown
- 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. Filters rated for Revised Total Coliform Rule can reduce the most common contaminant found in Williamstown's water.
- Check your home's plumbing. With 94% 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 Williamstown, PA