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Public water system record

Aqua Ohio - Tiffin

Serves Tiffin, Seneca County, OH · 20,279 people served

Federal records show no health-based violations and 1 monitoring/reporting issue for Aqua Ohio - Tiffin in the last ten years. At least one of these issues remains unresolved.

  • OH7400614
  • MARION
  • OH
  • 20,279 served

System profile

Source water Surface water
ZIP 43302
EPA system ID OH7400614

Verify this system on EPA ECHO →

Health-based violations, last 10 years
0
Resolved
0
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
1

Key facts

  • Aqua Ohio - Tiffin draws water from 5 wells and 1 surface water intake.
  • Most recent formal enforcement: compliance order (no penalty) by EPA, January 2010.
  • Record on file since 1993, with 7 health-based violations before October 19, 2016.
  • Lead pipe inventory: 2,012 lead and 4,065 unknown out of 8,525 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.

None since October 2016.

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
 Dec 30, 2019 Active

Full record since 1993

EPA's records for Aqua Ohio - Tiffin go back to 1993. Before October 19, 2016 they list 7 health-based violations (7 resolved) and 3 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 6 0
2000s 1 2
2010 to October 18, 2016 0 1
October 19, 2016 to 2019 0 1

Most recent health-based violation before October 19, 2016: Nitrate (acute), began December 2002, Resolved.

Show all 7 health-based violations before October 19, 2016
Contaminant Start date Status
Nitrate (acute)
Contaminant limit exceeded
Measured 12.1 mg/L, federal limit 10 mg/L (1.2 times the limit)
 Dec 1, 2002 Resolved
Surface Water Treatment Rule
Treatment technique failure
 Dec 1, 1993 Resolved
Surface Water Treatment Rule
Treatment technique failure
 Nov 1, 1993 Resolved
Surface Water Treatment Rule
Treatment technique failure
 Oct 1, 1993 Resolved
Surface Water Treatment Rule
Treatment technique failure
 Sep 1, 1993 Resolved
Surface Water Treatment Rule
Treatment technique failure
 Aug 1, 1993 Resolved
Surface Water Treatment Rule
Treatment technique failure
 Jul 1, 1993 Resolved

Enforcement actions

Ohio regulators and EPA took 2 formal enforcement actions against Aqua Ohio - Tiffin between 1993 and 2010. The most recent was a compliance order (no penalty) in January 2010.

Date By Action Violations covered
Jan 22, 2010 EPA Compliance order (no penalty) 3 violations: Total Trihalomethanes (TTHMs), Stage 2 Disinfection Byproducts Rule, Haloacetic Acids (HAA5)
Nov 30, 1993 Ohio Compliance order (no penalty) 4 violations (4 health-based): Surface Water Treatment Rule

Where the water comes from

Aqua Ohio - Tiffin draws water from 5 wells and 1 surface water intake.

Annual water quality report

Aqua Ohio - Tiffin 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.

Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.

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