GPA Review – December 2025 Update

Stage 1 of the EPA’s review of the Edwardstown GPA started in May 2025 to investigate the extent of groundwater contamination. New groundwater monitoring wells were installed, and new and existing wells were sampled to better understand levels of CHC contamination in groundwater.

This assessment was completed in September 2025 and found that groundwater deeper than the depths prohibited by the GPA is contaminated by TCE, and that contamination extends further to the west than the current GPA boundary.

The Stage 1 assessment report – September 2025 is now available.