Ohio Wastewater Variances: What you need to know

Governing Law and Regulations

Variances: Ohio Administrative Code (OAC) 3745-33-07

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Exceptions: OAC 3745-33-07(D)(1)

Variance term: OAC 3745-33-07(D)(2)

Variance conditions: OAC 3745-33-07(D)(3)

Variance application: OAC 3745-33-07(D)(4)

Public notice: OAC 3745-33-07(D)(5)

Temporary variances: OAC 3745-1-01(F)

Pretreatment variances: OAC 3745-3-09

Regulatory Agency

Ohio Environmental Protection Agency (Ohio EPA) Division of Surface Water

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Ohio has established limited conditions and times when a wastewater variance will be granted. Ohio requires that there be no degradation of water quality that results in a violation of the applicable water quality criteria for the designated uses, unless authorized by a water quality standard variance.

Administration and enforcement. Ohio EPA's Division of Surface Water is responsible for the administration and enforcement of the state's wastewater variance requirements.

State Requirements


OAC 3745-33-07

Ohio EPA may grant a variance to a WQS, which is the basis of a water quality-based effluent limitation (WQBEL) included in a National Pollutant Discharge Elimination System (NPDES) permit. A WQS variance applies only to the permittee requesting the variance and only to the pollutant or pollutants specified in the variance. A variance does not affect, or require Ohio EPA to modify, the corresponding water quality standard for the water body.


OAC 3745-33-07(D)(1)

WQS variances will not apply to:

  • Any building, structure, facility, or installation from which there is or may be a "discharge of ...

>> Read more about Wastewater Variances

State Requirements

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Ohio Wastewater Variances Resources

Wastewater Variances Products

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