Williamsport, PA: 92 Violations — 47/100 (2026)
4 ZIP codes · 7 water systems · Updated 2026-06-03
The latest EPA cycle for Williamsport shows a low safety grade within PA — compliance gaps have persisted over multiple reporting periods, and the city currently holds a low grade in available EPA data.
How Williamsport Compares
Data: EPA SDWIS Last verified: 2026-06-03
Williamsport Water: The Quick Version
- Your city's water systems recorded 92 violations in the past 5 years.
- Average lead level: 0.002 mg/L.
- Estimated remediation: $2,550 per household.
Water Systems Serving Williamsport
Federal drinking water records identify 7 systems in Williamsport, PA. The leading 3 providers serve the largest share of residential connections, each operating as a separate entity with its own rate authority, infrastructure management, and EPA compliance obligations — so service conditions are not uniform city-wide.
Overview
We track water quality and home safety data for 4 ZIP codes in Williamsport, Pennsylvania, covering 7 community water systems serving approximately 53,675 people.
4 of 4 ZIP codes (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Williamsport: D (47/100)
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
Williamsport water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0020 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
- Zone 1 (High): 4 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Surface Water Treatment Rule | Treatment Technique | 45 | 4 |
| Lead and Copper Rule | Treatment Technique | 25 | 4 |
| Contaminant 2959 | Other | 10 | 4 |
| Contaminant 0700 | Other | 10 | 4 |
| Copper | Inorganic | 5 | 4 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 17701 | F | 23 | 0 | Williamsport Mun Water Authority |
| 17702 | D | 23 | 0 | Williamsport Mun Water Authority |
| 17703 | D | 23 | 0 | Williamsport Mun Water Authority |
| 17705 | D | 23 | 0 | Williamsport Mun Water Authority |
All ZIP Codes in Williamsport
- 17701 [F] — 23 violations
- 17702 [D] — 23 violations
- 17703 [D] — 23 violations
- 17705 [D] — 23 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 Williamsport
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Williamsport: Remediation Cost in Perspective
While Williamsport homeowners face a manageable path to remediation, the equity share sits in the moderate tier — a signal that proactive budgeting matters more here than in lower-ratio markets.
Remediation costs are moderate relative to home values in Williamsport. The estimated $1,700–$3,425 range is manageable for most homeowners but still worth budgeting for. Home values are 9% below the Pennsylvania average.
Protecting Children from Lead in Williamsport
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.
Lead risk in Williamsport appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Williamsport
NFIP data for Williamsport documents 1302 flood insurance claims across the program's multi-decade tracking period, with 75% of ZIP codes mapped into FEMA flood zones. That level of exposure creates compounding risk during major flood events: treatment systems can be overwhelmed, wells can be contaminated, and distribution infrastructure can suffer backflow — all pathways by which flood events degrade local water quality beyond the physical damage.
Williamsport has a significant flood history with 1,302 FEMA flood insurance claims on record, averaging $15,772 per claim. With 75% of ZIP codes in FEMA-designated flood zones, flood risk is a major concern for homeowners and water quality.
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>$2,550</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 Williamsport
- 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 Surface Water Treatment Rule can reduce the most common contaminant found in Williamsport's water.
- 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 Williamsport, PA