Constellation Energy initiates sampling of residential wells, based on trends observed in monitoring wells on the fill site, and identifies a small number of wells with metals at levels slightly above EPA's primary drinking water standard.

Constellation Energy notifies regulators, initiates an investigation, and begins distribution of bottled water.

Anne Arundel County Health Department conducts its own tests of wells in the area.

Constellation Energy begins work with MDE to develop additional site controls, evaluation and corrective action.

Constellation Energy begins work with MDE on framing an agreement for additional site controls, evaluation and remediation.

Constellation Energy temporarily suspends coal ash delivery to the site.

Constellation Energy announces it will pay to connect residents on Summerfield and Brickhead Roads to county water supply.

MDE, Constellation Energy and BBSS enter into a consent agreement to resolve regulatory and environmental issues and to govern future site conditions.

Constellation Energy announces decision to extend the suspension of ash delivery to the site.

Constellation Energy connects Summerfield Road residents to temporary county water supply.

Constellation Energy submits plans to MDE for additional site assessment, and for alternative sources of water.

Constellation Energy files with MDE the results of groundwater evaluation and recommendations for improving site conditions.