States › Ohio › Guernsey County

Guernsey County, OH Water Quality

Water quality data for 4 public water systems serving Guernsey County, Ohio — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 4 water systems · 4 cities
✅
Generally Safe — Most Systems Performing Well

The majority of water systems have no active violations and lead levels well below the federal action level.

B

Guernsey County Earns a B

Guernsey County: 4 communities across 4 water systems. 100.0% have no open violations.

  • Median lead where detected: 1.00 ppb
  • 1 communities with a lead detection, 3 reporting none detected
  • 1 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 100.0% of communities have no open violations
1 ppb
Median Lead Level
County-wide, 90th percentile
4
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
  • Quaker City
    Not detected
    No federal limits exceeded on record
    B
  • Pleasant City
    1.00 ppb
    Copper above the 1,300 ppb action level
    B
  • Old Washington
    Not detected
    4 health-based violations since 2015
    B
  • Cambridge
    Not detected
    PFAS above the limit at 1 of 1 sampling points
    D
⚠ Needs Attention
  • Cambridge
    Not detected
    PFAS above the limit at 1 of 1 sampling points
    D
  • Old Washington
    Not detected
    4 health-based violations since 2015
    B
  • Pleasant City
    1.00 ppb
    Copper above the 1,300 ppb action level
    B
  • Quaker City
    Not detected
    No federal limits exceeded on record
    B
County Lead Level — Median 1 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1 ppb — 6.7% of the federal action level
Systems by Lead Level
Under 5 ppb
1
No Data
3

All Cities in Guernsey County

Cambridge Not detected D
Pleasant City 1.00 ppb B
Quaker City Not detected B
Old Washington Not detected B
Showing 4 cities
No active violations Active violations

About Guernsey County Drinking Water

Guernsey County is served by 4 water systems covering 4 communities. No community here has an open violation on record.

Of the communities reporting lead results, 1 recorded a detection, with a median of 1.00 ppb — 7% of the federal action level. 3 reported none detected, which means below the laboratory limit rather than an absence of lead.

1 of 4 communities have PFAS above the limits EPA set in 2024, measured as a running annual average at each sampling point. State inspectors recorded no significant deficiencies.

Frequently Asked Questions

Is Guernsey County tap water safe to drink?▼
No community in Guernsey County has an open violation on record. 1 of 4 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Guernsey County?▼
Among communities with a detection the median is 1.00 ppb, 7% of the 15 ppb action level. 3 reported none detected and 0 reported no result.
How many water systems serve Guernsey County?▼
4 community water systems serve 4 communities here.
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