GPA Review – Background

Information collected in September 2023 from the Melrose Park EPA assessment area, adjacent to the Edwardstown GPA, identified the need for further assessment of deeper groundwater to the west of South Road.

In May 2024, the EPA further investigated groundwater in the South-Eastern Edwardstown assessment area, which is a part of the Edwardstown GPA, to understand whether previously identified CHC contamination is also present in groundwater deeper than the existing GPA.

This assessment found that the deeper groundwater is impacted by CHC contamination, with TCE detected at concentrations above the drinking water guideline at several monitoring wells.

These findings prompted the EPA to begin a review of the boundaries of the GPA, to ensure that it sufficiently protects people from accessing contaminated groundwater.

A map of the existing GPA is available here.