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Public water system record

Oberlin Water Department

Serves Oberlin, Lorain County, OH · 8,600 people served

Federal records show 2 health-based violations and 1 monitoring/reporting issue for Oberlin Water Department in the last ten years. The most serious issue in this window was a resolved Interim Enhanced Surface Water Treatment Rule violation.

  • OH4700911
  • LAGRANGE
  • OH
  • 8,600 served

System profile

Source water Surface water
ZIP 44050
EPA system ID OH4700911

Verify this system on EPA ECHO →

Health-based violations, last 10 years
2
Resolved
2
Unresolved
0
Any acute record
Yes
Monitoring issues, last 10 years
1

Key facts

  • Oberlin Water Department draws water from 2 surface water intakes and 1 reservoir (1 of them for emergency, seasonal or other part-time use).
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit), 2017.
  • Record on file since 1996, with 4 health-based violations before October 19, 2016.
  • Lead pipe inventory: 1 lead and 542 unknown out of 2,223 service lines.

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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
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Mar 1, 2024 Resolved Yes
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Jan 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
 Sep 14, 2018 Active

Full record since 1996

EPA's records for Oberlin Water Department go back to 1996. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 2 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 0 2
2000s 2 0
2010 to October 18, 2016 2 0
October 19, 2016 to 2019 1 1
2020s 1 0

Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began April 2011, Resolved.

Show all 4 health-based violations before October 19, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Apr 1, 2011 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 Jan 1, 2011 Resolved
Surface Water Treatment Rule
Treatment technique failure
 May 1, 2005 Resolved
Surface Water Treatment Rule
Treatment technique failure
 Jan 1, 2005 Resolved

What the violations mean

Interim Enhanced Surface Water Treatment Rule

1 incident

The system did not meet a filtration or treatment requirement for surface water

Inadequate treatment of surface water can let pathogens such as Cryptosporidium and Giardia through

Total Trihalomethanes (TTHMs)

1 incident

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

Oberlin Water Department draws water from 2 surface water intakes and 1 reservoir (1 of them for emergency, seasonal or other part-time use).

Annual water quality report

Oberlin Water Department 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