States › Ohio › Lake County

Lake County, OH Water Quality

Water quality data for 5 public water systems serving Lake County, Ohio — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 5 water systems · 19 cities
✅
Excellent — All Systems Performing Well

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

A

Lake County Earns a A

Lake County: 19 communities across 5 water systems. 100.0% have no open violations.

  • Median lead where detected: none detected
  • 0 communities with a lead detection, 19 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 2 with significant inspection deficiencies
  • 100.0% of communities have no open violations
—
Median Lead Level
County-wide, 90th percentile
5
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
  • Fairport Harbor
    Not detected
    1 health-based violation since 2015
    B
  • Mentor
    Not detected
    Copper above the 1,300 ppb action level
    A
  • Willoughby
    Not detected
    Copper above the 1,300 ppb action level
    A
  • Painesville
    Not detected
    1 significant inspection deficiency
    A
  • Eastlake
    Not detected
    Copper above the 1,300 ppb action level
    A
⚠ Needs Attention
  • Mentor
    Not detected
    Copper above the 1,300 ppb action level
    A
  • Willoughby
    Not detected
    Copper above the 1,300 ppb action level
    A
  • Painesville
    Not detected
    1 significant inspection deficiency
    A
  • Eastlake
    Not detected
    Copper above the 1,300 ppb action level
    A
  • Willowick
    Not detected
    Copper above the 1,300 ppb action level
    A

All Cities in Lake County

Mentor Not detected A
Willoughby Not detected A
Painesville Not detected A
Eastlake Not detected A
Willowick Not detected A
Wickliffe Not detected A
Willoughby Hills Not detected A
North Madison Not detected A
Mentor-on-the-Lake Not detected A
Kirtland Not detected A
Fairport Harbor Not detected B
Madison Not detected A
Perry Not detected A
North Perry Not detected A
Kirtland Hills Not detected A
Timberlake Not detected A
Waite Hill Not detected A
Grand River Not detected A
Lakeline Not detected A
Showing 19 cities
No active violations Active violations

About Lake County Drinking Water

Lake County is served by 5 water systems covering 19 communities. No community here has an open violation on record.

Lead was not detected in any community in Lake County that reported a result.

No community here has PFAS above the federal limit on record. State inspectors recorded significant deficiencies at 2 of them.

Frequently Asked Questions

Is Lake County tap water safe to drink?▼
No community in Lake County has an open violation on record. No community has PFAS above the federal limit on record.
What is the lead level in Lake County?▼
No community reported a lead detection.
How many water systems serve Lake County?▼
5 community water systems serve 19 communities here.
← Back to Ohio water quality overview