Congressional District # 02
MILFORD CONTAMINATED AQUIFEREPA ID# OHSFN0507973
Last Updated: March, 2015
The Milford Contaminated Aquifer site is located in the city of Milford, Ohio, located approximately fifteen miles northeast of Cincinnati, Ohio. The site is a groundwater plume contaminated with chlorinated solvents in the area of Main Street and Lila Avenue. The city of Milford obtains its drinking water from a well field consisting of four wells in the aquifer containing this groundwater plume. Volatile organic compounds (VOCs) were first detected in the Milford public wells in 1986. Despite several investigations by the Ohio Environmental Protection Agency, the source of contamination was not found and the state referred the site to the United States Environmental Protection Agency (EPA). Milford's well field serves 6,000 people. The City of Milford installed and maintains an air stripper to remove the VOCs from treated water.
The site is being addressed as an EPA fund-lead investigation with consultation from the Ohio EPA.
Threats and Contaminants
VOCs were first detected in two of the Milford public wells in 1986. Since that time, 1,1,1-trichloroethane (1,1,1-TCA), trichloroethene (TCE), and 1,1-dichloroethene (1,1-DCE) have been detected in two of the wells at levels exceeding the maximum contaminant levels (MCLs) established by the Safe Drinking Water Act.
Studies show that exposure from breathing or drinking large amounts of 1,1,1-TCA causes effects in the liver and nervous system. Exposure to large amounts of TCE may cause nerve, kidney, and liver damage and impaired immune system function and fetal development. Exposure to large amounts of 1,1-DCE has caused liver, kidney, and lung damage in animal studies.
Because the municipal water treatment plant treats the raw drinking water with an air stripper, there are no exposures to contamination through the municipal water supply. There are also no known private water supply wells within a 1-mile radius of the site.
The Milford Contaminated Aquifer site was added to the Superfund program National Priorities List (NPL) in March 2011. Sites on the NPL are eligible for financial resources to characterize the extent of contamination and develop a cleanup plan. The first step for EPA is to do a Remedial Investigation and Feasibility Study (RI/FS). The RI includes taking more samples to determine where the contamination is coming from and how far the contamination extends, and the FS will determine what approaches are best to clean up the site. EPA has completed Phase I RI sampling at the site in 2014 and will complete Phase II RI work in 2015.
Community InvolvementCommunity Interviews were conducted in April 2012 to gather the community's concerns and input on how best to communicate information from the site.
Property ReuseProperty uses above the contaminated groundwater are a mix of commercial and residential. Current property uses are expected to be the same after a remedy is selected and implemented.
ContactsRemedial Project Manager, U.S. EPA
jennifer elkins (firstname.lastname@example.org)
Community Involvement Coordinator, U.S. EPA