CCR Rule Compliance Data and Information

AEP is committed to being a good neighbor and operating our facilities in a way that meets or exceeds all regulations and protects public safety and health. This includes operating in full compliance with the EPA’s Coal Combustion Residuals (CCR) Rule and ensuring that our coal ash storage sites are not adversely impacting groundwater.

Overview of the New Rule

The CCR rule established new requirements for how coal ash – the material that is left over after coal is burned to make electricity – is stored at our power plants. While we’ve previously monitored groundwater at many of our coal ash storage sites, the CCR rule created new requirements to install more wells and test for additional substances at 29 ash storage sites at 13 power plants. We completed the first phase of testing and will do additional monitoring and evaluations during 2018.

In this first phase, AEP has installed more than 300 new wells to better monitor the quality of groundwater at our plant sites. Multiple groundwater samples from each well were taken to establish a baseline for 21 substances, many of which naturally occur in groundwater. Additional information, including the actual groundwater monitoring data and statistical analysis of the data, can be found on the individual plant pages below.

What We Know Today

The initial sampling data show potential groundwater impacts. The fact that one or more groundwater samples may show higher concentrations of some substances does not mean that the drinking water in the surrounding area is impacted or unsafe. There is still a lot left to learn. We will do additional monitoring and analysis to determine if there are any areas where groundwater outside the immediate site is being affected and if any impacts are coming from the ash storage facility. It’s important to remember that samples so far have been taken very close to the ash storage sites where any groundwater impacts would be most significant.

What’s Next

We are proactively reaching out and meeting with plant neighbors and community leaders to answer questions about the data collected so far and to discuss next steps. We’ve begun additional monitoring and evaluation to determine if there is any impact beyond the plant boundaries.

If we determine that changes in water quality are coming from one of our ash storage sites, we will put in place a mitigation plan specific to that site to address the changes, including potential closure of the storage site. That process will include the opportunity for public input.

Additional Information

Active Facilities


  • Cardinal Plant

    As of March 1, 2018, AEP Generation Resources Inc. no longer operates Cardinal Plant. Going forward, CCR-related compliance documents will be posted and maintained on the publicly available website of Ohio Electric Cooperatives – Buckeye Power.

  • Gavin

    As of January 30, 2017, AEP Generation Resources Inc. no longer owns or operates Gavin Plant. CCR-related compliance documents are posted and maintained on the publicly available website of Gavin Power, LLC.