North Basin Groundwater Remedial Investigation and Feasibility Study

The North Basin Groundwater Remedial Investigation and Feasibility Study focuses on a five-square-mile portion of the groundwater aquifer located under Fullerton, Anaheim and Placentia.

Manufacturing industries operating primarily in the 1950s, 60s and 70s left a legacy of industrial pollutants at their former factories. The pollutants, mostly volatile organic compounds (VOCs) including solvents and degreasers, have migrated through the soils and are now leaching into the underlying groundwater. These VOCs have impacted nearby water supply wells causing four of them to be taken out of service. OCWD has been conducting a remedial investigation and feasibility study (RI/FS) under EPA oversight. OCWD field geologists and hired consultants are nearly finished with the first phase of drilling, with 10 of the planned 14 monitoring wells complete, and expects to complete the EPA directed remedial investigation by April 2018.

OCWD staff has been working with the Prop 1 grant administrators within the State Water Resources Control Board to secure partial funding of the RI/FS work, and following the RI/FS process, interim and then final remedial action plans will be evaluated, selected and implemented. OCWD and select potentially responsible parties are engaged with the regulators and are working toward a long-term solution. The District will be looking to potentially responsible parties to fund those operations either through collaboration, litigation or by order of the EPA.

North basin plume map

Please click on the graphic below to view the plume map full screen.