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Enforcement and Administrative Penalty Programs 

Learn more about enforcement actions taken by the Division of Drinking and Ground Waters for violations of the Safe Drinking Water rules.

Ground Water Support (Technical Guidance Manual)

Ground Water Support to Ohio EPA Programs

Provides technical assistance to the public, regulated community, other governmental entities and other Ohio EPA Divisions concerning ground water related issues

Technical Guidance Manual for Hydrogeologic Investigations and Ground Water Monitoring (TGM)

Identifies technical considerations for performing hydrogeologic investigations and ground water monitoring at potential or known ground water pollution sources

Ground Water Quality Characterization

Ground Water Quality Characterization Program

Ground water quality characterization characterizes ambient ground water quality conditions, identifies ground water contamination, and recommends strategies for preventing contamination

Operator and Laboratory Certifications

Laboratory Certification

Locate a certified laboratory and get guidance about how to become a certified laboratory including resources and reporting.

Operator Certification

Certifies water and wastewater system operators to ensure public water and wastewater systems are operated by properly trained and qualified individuals.

Public Water Systems

The largest section of DDAGW is involved with overseeing public water systems.

Public Water Systems

A comprehensive list of information pertaining to public water system operating and compliance.

Asset Management

The intent of an asset management program (AMP) is to provide public water systems with a tool to better manage, operate, and maintain their water system so that they can cost-effectively and consistently meet safe drinking water requirements. 

Capability Assurance

Ensures public water systems have the technical, managerial and financial capability to ensure long term compliance with all public drinking water regulations.

Data Reporting

Reporting requirements and form submission for public water systems and certified laboratories. 

Engineering and Plan Approval

Plan reviews and guidance for drinking water facilities, backflow prevention and cross-connection control.

Financial Assistance

Coordinates several programs that offer below market rate loans to eligible public water systems to fund improvements to eliminate public health threats and ensure compliance with federal and state drinking water laws and regulations.

Harmful Algae Blooms (HABs)

In Ohio, public water systems with a surface water source(s) must comply with HAB monitoring and reporting rule requirements (OAC 3745-90-03). 

Lead and Copper

Includes required forms, summaries of key requirements, other helpful documents and answers to frequently asked questions regarding the lead and copper rule.

License to Operate (LTO)

In Ohio, public water systems (PWSs) are required to obtain a license to operate (LTO) from Ohio EPA. The LTO indicates the PWS is approved by the Agency to supply drinking water to the public and must be prominently displayed at the facility. PWS are required to renew their license every year.

Public Water System Monitoring

Includes public water system monitoring and guidance, monitoring schedules and how to report results to the Ohio EPA (electronic data reporting).

Revised Total Coliform Rule (RTCR)

Includes required forms, summaries of key requirements, other helpful documents and answers to frequently asked questions about the revised total coliform rule. 

Rules, Policies and Guidance


Ohio Administrative Code (OAC) rules administered by the Division of Drinking and Ground Waters are located on the Rules page.

Policies and Guidance

Current effective policy and guidance documents related to the safe drinking water program are included on the Rules page.

Emergency Preparedness and Security

Emergency Preparedness and Security

Tools and resources to help water systems prepare for, respond to and recover from emergency events. A quick and effective response to emergency events is critical for protection of public health and the environment.

Source Water Assessment and Protection

Source Water Assessment and Protection Program 

Also known as "Wellhead Protection" and "Drinking Water Source Protection," the Source Water Assessment and Protection (SWAP) Program assists public water suppliers with protecting sources of drinking water (streams, rivers, lakes, reservoirs and aquifers) from contamination.

Public Drinking Water Supply Beneficial Use

The collaboration between the Clean Water Act and the Safe Drinking Water Act works to ensure public water systems produce safe drinking water using only conventional treatment, resulting in reduced financial cost to communities and minimized risk to human health.

Underground Injection Control

Underground Injection Control

The UIC program is responsible for the regulation of Class I, IV and V injection wells, and for assuring that their operation does not contaminate underground sources of drinking water.