Tioga County, Pennsylvania
21 ZIP codes · Avg score 52/100 · Grade D · Updated 2026-06-03
In recent EPA cycles, Tioga County's 21 ZIP codes show a persistent below-average water quality pattern — documented violations span multiple areas, have appeared consistently across recent reporting periods, and the compliance shortfalls are spread across the county rather than isolated to a single geographic pocket or utility district, suggesting a broader structural issue rather than a localized anomaly.
How Tioga County Compares
How Tioga County Compares
Tioga County scores 3 points below the Pennsylvania state average (55/100) and 16 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Tioga County, Pennsylvania
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Estimated additional annual cost per homeowner: $1,640, driven primarily by flood
Infrastructure: 0.475% avg pipe failure probability, 86% of ZIPs at high risk
70.7% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Tioga County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 8 violations. Past 5 years: 15 total (15 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,640
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
23,202 housing units in Tioga County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Tioga County
Remediation costs are relatively manageable for most homeowners in Tioga County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Water Systems with Most Violations
Top 5 systems in Tioga County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Blossburg Municipal Authority | 1,650 | 83 |
| 2 | Elkland Boro Water Authority | 2,660 | 69 |
| 3 | MANSFIELD BOROUGH MUN AUTH | 4,100 | 54 |
| 4 | Mansfield University | 3,000 | 54 |
| 5 | Lawrenceville Boro Water Department | 691 | 37 |
18 total water systems serve Tioga County.
All ZIP Codes in Tioga County
21 ZIP codes tracked in Tioga County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 16939 | Morris Run | 62 | C | 1 | $94K |
| 2 | 16933 | Mansfield | 60 | C | 54 (2 health) | $201K |
| 3 | 16942 | Osceola | 60 | C | 5 | $133K |
| 4 | 16946 | Tioga | 60 | C | 5 | $157K |
| 5 | 16912 | Blossburg | 56 | C | 3 | $136K |
| 6 | 16901 | Wellsboro | 55 | C | 21 | $211K |
| 7 | 16911 | Arnot | 54 | D | 5 (1 health) | $145K |
| 8 | 16930 | Liberty | 53 | D | 0 | $210K |
| 9 | 16932 | Mainesburg | 53 | D | 0 | $266K |
| 10 | 16935 | Middlebury Center | 53 | D | 0 | $195K |
| 11 | 16936 | Millerton | 53 | D | 0 | $167K |
| 12 | 16938 | Morris | 53 | D | 0 | $188K |
| 13 | 16928 | Knoxville | 52 | D | 7 | $117K |
| 14 | 16921 | Gaines | 51 | D | 12 | $188K |
| 15 | 16950 | Westfield | 51 | D | 13 | $122K |
| 16 | 16920 | Elkland | 48 | D | 22 | $137K |
| 17 | 16929 | Lawrenceville | 48 | D | 37 | $155K |
| 18 | 16940 | Nelson | 48 | D | 28 (6 health) | — |
| 19 | 16917 | Covington | 45 | D | 0 | $161K |
| 20 | 17765 | Roaring Branch | 45 | D | 10 | $205K |
| 21 | 17034 | Highspire | 35 | F | 0 | $120K |
Recommended Buyer Guides for Tioga County
Federal and certification sources drive the ordering: EPA monitoring data, NSF certifications, FEMA flood maps, and CDC lead guidance — guides surface only when county data warrants them.
- Best Lead Paint Test Kits — 70.7% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Tioga County, Pennsylvania
Overview
Tioga County in Pennsylvania covers 21 ZIP codes with an average Home Safety Score of D (52/100).
14 of 21 ZIP codes have recorded EPA violations. 9 health-based violations have been documented.
← Back to Pennsylvania water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.
What You Can Do
Tioga County has a grade of D. Here are steps to protect your household.
Test your tap water
Order a certified lab test kit ($20-$50) to check for lead, bacteria, and other contaminants specific to your ZIP code.
Consider a certified water filter
NSF-certified filters can remove most common contaminants. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It details exactly what was found in your water supply.
Check for lead in your home
70.7% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.