Hinkley groundwater contamination

From 1952 to 1966, Pacific Gas and Electric Company (PG&E) dumped about 370 million gallons (1,400 million litres) of chromium-tainted wastewater into unlined wastewater spreading ponds around the town of Hinkley, California, located in the Mojave Desert about 120 miles north-northeast of Los Angeles.

Not to be confused with Hinkley Point C nuclear power station.

PG&E used chromium 6, or hexavalent chromium (a cheap and efficient rust suppressor), in its compressor station for natural-gas transmission pipelines. Hexavalent-chromium compounds are genotoxic carcinogens.

In 1993, legal clerk Erin Brockovich began an investigation into the health impacts of the contamination. A class-action lawsuit about the contamination was settled in 1996 on July 2nd for $333 million (around $634 million in 2023). In 2008, PG&E settled the last of the cases involved with the Hinkley claims. Since then, the town's population has dwindled to the point that in 2016 The New York Times described Hinkley as having slowly become a ghost town.

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