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Tioga County, NY Water Quality

Water quality data for 8 public water systems serving Tioga County, New York — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 8 water systems · 9 cities
✅
Excellent — All Systems Performing Well

Water quality across the county is outstanding with minimal violations and very low lead levels.

A

Tioga County Earns a A

Tioga County: 9 communities across 8 water systems. 100.0% have no open violations.

  • Median lead where detected: 2.40 ppb
  • 9 communities with a lead detection, 0 reporting none detected
  • 1 communities with PFAS above the federal limit
  • 1 with significant inspection deficiencies
  • 100.0% of communities have no open violations
2.4 ppb
Median Lead Level
County-wide, 90th percentile
8
Water Systems
Active CWS & NTNCWS
100%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • Owego
    2.40 ppb
    No federal limits exceeded on record
    A
  • Newark Valley
    2.60 ppb
    No federal limits exceeded on record
    B
  • Candor
    1.00 ppb
    No federal limits exceeded on record
    B
  • Nichols
    2.45 ppb
    No federal limits exceeded on record
    B
  • Tioga
    2.40 ppb
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • Barton
    3.30 ppb
    PFAS above the limit at 1 of 4 sampling points
    B
  • Richford
    0.20 ppb
    1 significant inspection deficiency
    B
  • Owego
    2.40 ppb
    No federal limits exceeded on record
    A
  • Newark Valley
    2.60 ppb
    No federal limits exceeded on record
    B
  • Candor
    1.00 ppb
    No federal limits exceeded on record
    B
County Lead Level — Median 2.4 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2.4 ppb — 16% of the federal action level
Systems by Lead Level
Under 5 ppb
9

All Cities in Tioga County

Barton 3.30 ppb B
Owego 2.40 ppb A
Newark Valley 2.60 ppb B
Candor 1.00 ppb B
Nichols 2.45 ppb B
Tioga 2.40 ppb A
Richford 0.20 ppb B
Spencer 2.50 ppb B
Berkshire 0.80 ppb B
Showing 9 cities
No active violations Active violations

About Tioga County Drinking Water

Tioga County is served by 8 water systems covering 9 communities. No community here has an open violation on record.

Of the communities reporting lead results, 9 recorded a detection, with a median of 2.40 ppb — 16% of the federal action level. 0 reported none detected, which means below the laboratory limit rather than an absence of lead.

1 of 9 communities have PFAS above the limits EPA set in 2024, measured as a running annual average at each sampling point. State inspectors recorded significant deficiencies at 1 of them.

Frequently Asked Questions

Is Tioga County tap water safe to drink?▼
No community in Tioga County has an open violation on record. 1 of 9 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Tioga County?▼
Among communities with a detection the median is 2.40 ppb, 16% of the 15 ppb action level. 0 reported none detected and 0 reported no result.
How many water systems serve Tioga County?▼
8 community water systems serve 9 communities here.
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