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Public water system record

Guernsey Co. Water Dept.

Serves an area of Guernsey County, OH · 8,891 people served

Federal records show 4 health-based violations and 3 monitoring/reporting issues for Guernsey Co. Water Dept. in the last ten years. The most serious issue in this window was a resolved Haloacetic Acids (HAA5) violation.

  • OH3000603
  • CAMBRIDGE
  • OH
  • 8,891 served

System profile

Source water Purchased surface water
ZIP 43725
EPA system ID OH3000603

Verify this system on EPA ECHO →

Health-based violations, last 10 years
4
Resolved
4
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
3

Key facts

  • Guernsey Co. Water Dept. buys its water from City of Cambridge.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.099 mg/L, federal limit 0.08 mg/L (1.2 times the limit), 2017.
  • Most recent formal enforcement: compliance order (no penalty) by Ohio, December 2018.
  • Record on file since 2002, with 0 health-based violations before October 19, 2016.
  • Lead pipe inventory: 6 lead and 424 unknown out of 4,028 service lines.

Check whether Guernsey Co. Water Dept. serves your address

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.063 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 220 Apr 1, 2024 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Oct 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.099 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Jul 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Apr 1, 2017 Resolved No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Consumer Confidence Rule
OTHER
 Nov 6, 2025 Active
Haloacetic Acids (HAA5)
Monitoring and reporting
 Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.

Full record since 2002

EPA's records for Guernsey Co. Water Dept. go back to 2002. Before October 19, 2016 they list no health-based violations and 2 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2000s 0 2
October 19, 2016 to 2019 3 0
2020s 1 3

Enforcement actions

Ohio regulators took 1 formal enforcement action against Guernsey Co. Water Dept. in 2018. The most recent was a compliance order (no penalty) in December 2018.

Date By Action Violations covered
Dec 20, 2018 Ohio Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)

What the violations mean

Total Trihalomethanes (TTHMs)

3 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Haloacetic Acids (HAA5)

1 incident

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase cancer risk

Where the water comes from

Guernsey Co. Water Dept. buys its water from City of Cambridge. It lists no wells or intakes of its own.

Buys water from

Annual water quality report

Guernsey Co. Water Dept. must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Ohio.

Certified drinking water labs by state EPA guidance for private wells