MARION, OH · Seneca County

AQUA OHIO - TIFFIN Water System

Current status

1 item on record is open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Ohio’s official records. Always confirm current status with Ohio before making decisions based on this information.

System facts

System ID (PWSID): OH7400614
System type: Community Water System
Population served: 20,279
Service connections: 8,311
Ownership: privately owned
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
December 30, 2019
Unaddressed
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
December 1, 2002 – December 27, 2002
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 1993 – December 31, 1993
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
November 1, 1993 – November 30, 1993
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 1993 – October 31, 1993
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
September 1, 1993 – September 30, 1993
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
August 1, 1993 – August 31, 1993
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
July 1, 1993 – July 31, 1993
Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
December 30, 2019	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Unaddressed
December 1, 2002 – December 27, 2002	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
December 1, 1993 – December 31, 1993	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
November 1, 1993 – November 30, 1993	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
October 1, 1993 – October 31, 1993	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
September 1, 1993 – September 30, 1993	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
August 1, 1993 – August 31, 1993	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
July 1, 1993 – July 31, 1993	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Enforcement actions

November 10, 2010Federal Compliance achieved3 linked violations
January 22, 2010Federal Final Administrative Order issued3 linked violations

Contact

AQUA OHIO INC - TIFFIN

740-383-0939

MARION, OH 43302