Ohio Groundwater regulations & environmental compliance analysis

Ohio Groundwater: What you need to know

Governing Law and Regulations

State Groundwater Program: Ohio Administrative Code (OAC) 3745-54-90 to 3745-54-96

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Water well standards:

Well standards: OAC 3745-9-01 to 3745-9-10

Plans: OAC 3745-91-01 to 3745-91-12

Monitoring at landfills: OAC 3745-30-08

Monitoring at TSDF interim-status facilities: OAC 3745-65-90 to 3745-65-94

Sampling and analysis: OAC 3745-65-92

Groundwater quality assessment: OAC 3745-65-93

Monitoring underground injection control (UIC) wells: OAC 3745-34-01 to 3745-34-62

Animal waste management facilities: OAC 1501:15-5-03 and OAC 901:10-5

Regulatory Agencies

Ohio Environmental Protection Agency (Ohio EPA)

Ohio EPA Division of Drinking and Ground Waters (DDAGW)

Ohio EPA Division of Hazardous Waste Management

Ohio Department of Natural Resources (DNR)

Ohio Department of Agriculture (DOA)

Ohio Department of Health (DOH)

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Ohio's groundwater regulations for owners and operators of final permitted hazardous waste treatment, storage, and disposal facilities (TSDFs) include the federal requirements with more stringent state rules for sampling, analysis, and groundwater quality assessment programs at interim status facilities. For additional guidance, see the national section GROUNDWATER.

Administration and enforcement. The Ohio Environmental Protection Agency's (Ohio EPA) Division of Drinking and Ground Waters (DDAGW) administers and enforces the groundwater rules in Ohio.

State Requirements


Ohio EPA's DDAGW has established a program to protect groundwater resources in Ohio. Specifically, the Groundwater Program:

  • Oversees ...

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