Protecting our community’s drinking water

employee testing water in a lab

Under our existing regulatory framework, we have monitored groundwater at some of our power plants since the 1980s to ensure drinking water resources for our community meet safe drinking water standards.

  • The data which is reported to the Kentucky Department for Environmental Protection demonstrates water quality surrounding our power plants has remained, and continues to remain, safe for recreational use and does not indicate any threat to drinking water supplies.
  • Water quality is also monitored, tested and affirmed by each respective local water utility that provides service to the nearby areas.

Complying with the EPA’s more stringent regulations

  • We continue to take aggressive measures to assure our communities’ land and water resources are protected, and we continually invest in our facilities to comply with ever-changing local, state and federal environmental regulations. This includes regular and recurring monitoring, measuring and reporting our facilities’ performance to the appropriate regulatory agencies.
  • In 2017, we installed additional groundwater monitoring wells along the perimeter of our impoundments, and we recently installed new additional groundwater monitoring wells where necessary at our facilities to further evaluate conditions. These installations are in compliance with the EPA’s CCR Rule.  
  • While there are indications that levels of certain constituents at some locations do not currently meet the tightened groundwater protection standards under the CCR Rule, this is, in part, why we launched plans to move toward dry management over a decade ago, as well as close our existing CCR impoundments as provided in filings with the Kentucky Public Service Commission in January 2016.  We are confident that our planned measures will ensure compliance with applicable requirements.
  • As a result of the more stringent CCR Rule standards, we, along with other utilities across the country, launched aggressive projects to systematically close out all of their remaining wet storage facilities – also referred to as ash ponds and surface impoundments.  To date, more than one-half of our facilities have been closed, with the other half either under contract for closure or in the initial commercial phase of closure.
  • We are operating new CCR treatment and dry management facilities at our E.W. Brown, Ghent, Mill Creek and Trimble County power plants. We also constructed at all four plants new state-of-the-art process water treatment facilities to treat waters that come in contact with CCR materials prior to our impoundments being closed.  

What are groundwater monitoring reports?

Under the CCR Rule, utilities were required to install additional groundwater monitoring wells along the immediate perimeters of their impoundments where they manage CCR materials.

Utilities then had a specific amount of time to gather rounds of groundwater monitoring data from each monitoring well to establish a background.  This helped determine baseline levels for constituents identified in the CCR Rule that are naturally occurring in that area and if there were other potential local sources that could be contributing to higher results.

Utilities that operate ash ponds and surface impoundments, under the CCR Rule, publish annual documents called groundwater monitoring and corrective action reports. These annual reports contain information and data obtained during the previous calendar year and are published online by the utility. 

In compliance with the CCR Rule, utilities have been gathering groundwater quality data around CCR impoundments and their facilities to establish background concentration levels of certain constituents that are naturally occurring in local groundwater.

If groundwater monitoring data showed constituent levels for certain metals did not meet the tightened standards, utilities must then determine how best to address and correct the issue.