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Topock Compressor Station | VRP SITE


Pacific Gas and Electric Company's (PG&E) Topock Compressor Station is located in San Bernardino County, Calif., approximately 12 miles southeast of Needles, Calif., along the Colorado River. Moabi Regional Park, Calif., is one mile northwest of the station; Topock, Ariz., is one-half mile east, across the Colorado River; and Golden Shores, Ariz., is five miles to the north, across the Colorado River.

Contaminants of Concern

  • Hexavalent chromium 

Affected Media

  • Soil (Soil affected in California only)
  • Groundwater (Groundwater affected in California only)

What Are My Health Risks?:

For Soil | There is little to no health risk unless there is contact with skin or ingestion of contaminated soil. (Soil affected in California only.)

For Groundwater | To date, sampling results consistently indicate that Arizona groundwater is not impacted by chromium.

If you have a private well in the vicinity of the exceedance, we encourage you to test the well water.
Not sure what to test for? | 
Learn More > 

Site Summary: 

  • Due to the Topock Compressor Station's proximity to the Colorado River, ADEQ participates in investigation activities as they relate to the Colorado River and potential future impacts to Arizona's groundwater
  • Remediation of the site is being overseen by the California Department of Toxic Substances Control (DTSC) and the U.S. Department of the Interior (DOI)
  • PG&E is currently operating a groundwater extraction and treatment system as an Interim Remedy
  • In Situ Treatment with Freshwater Flushing has been selected as the final remedy; construction began October 2018
  • Please see for the latest information