The Real Hinkley Case Erin Brockovich (2000)

The film compresses a fourteen-year contamination history, four years of plaintiff outreach, three years of litigation, and a 1996 binding arbitration into a two-hour narrative arc. The compression is honest about what mattered. It is less honest about what came after.

PG&E used hexavalent chromium as a corrosion inhibitor for fourteen years

From 1952 to 1966, Pacific Gas and Electric Company added hexavalent chromium (chromium-6) to the cooling-tower water at its natural-gas compressor station in Hinkley, California — a small Mojave Desert town on the southern edge of San Bernardino County, about a hundred and twenty miles northeast of Los Angeles. Chromium-6 is an industrial corrosion inhibitor; it kept the cooling towers from rusting. The company dumped the cooling-tower wastewater — approximately 370 million gallons over fourteen years — into unlined holding ponds adjacent to the plant. The ponds leaked. The contamination plume migrated into the groundwater that fed the wells of every household in Hinkley. (epa, wikipedia — hinkley)

Chromium-6 is carcinogenic. Sustained exposure causes stomach cancer, kidney damage, liver damage, reproductive damage, and skin lesions. It can be transmitted through the placenta and damage developing fetuses. The chemistry is well-documented. PG&E's internal documents from the 1960s show the company was aware of the risk.

A 1966 internal memo ordered local plant managers not to discuss the contamination

The smoking-gun document the film attributes to Charles Embry's preserved files is real. A 1966 memo from PG&E corporate headquarters in San Francisco instructed the Hinkley plant not to discuss the chromium contamination with neighbors. The memo was the basis for the punitive damages claim — without proof that headquarters knew, the case could only have pursued the local plant for negligence, which would not have produced a settlement that materially changed any plaintiff's life.

"I have proof that they knew." — Erin Brockovich (paraphrased from the film, on the 1966 memo), Erin Brockovich (2000)

The settlement was awarded through binding arbitration, not a jury verdict

In 1996, retired California Superior Court judge John Trotter awarded $333 million to the 634 plaintiffs in binding arbitration — not, as the film's compressed depiction might suggest, a jury verdict. Binding arbitration was the procedural mechanism the film's town-hall scene (beat 36) dramatizes Erin defending. It was the largest direct-action lawsuit settlement in American history at the time. Masry & Vititoe's contingency fee was approximately 40 percent — roughly $133 million — split among the firm and the partner firms (Engstrom, Lipscomb & Lack and the firm later headed by Kurt Potter) that joined the case. Individual plaintiff payments ranged from approximately $50,000 to $5 million depending on documented health damage. The Jensen family — Donna's family in the film — received approximately $5 million. (la times, wikipedia — masry)

The contamination is not gone

PG&E spent decades and hundreds of millions of dollars on remediation. The plume kept growing. By 2010, sampling indicated the plume had expanded by at least a mile beyond its 1996 boundaries. PG&E began purchasing and bulldozing homes on contaminated land — a buyout that effectively depopulated much of the town. The Hinkley elementary school closed in 2013 because too many families had left. By the mid-2020s, Hinkley's population had dropped to under half its 2012 size. (grist, pbs)

Current testing in some Hinkley wells still shows chromium-6 levels at thousands of times the California state safety standard of 10 parts per billion (set in 2014, still subject to legal challenge as too lenient). Full remediation projections range from 50 years to "indefinite." PG&E's bankruptcy filings related to California wildfire liabilities (2019 onward) have added uncertainty to the cleanup timeline. (ehn)

"My white count was dropping dramatically. My immune system was failing." — Erin Brockovich (on her own health effects from years of investigation), Hollywood Reporter (2020)

The contamination was not unique to Hinkley

In 2010, the Environmental Working Group tested tap water in 35 American cities. Hexavalent chromium was found in 31 of them. Norman, Oklahoma, recorded the highest levels — 12.9 parts per billion — followed by Honolulu, Riverside, Madison, and San Jose. The contamination is generally a byproduct of industrial processes — chrome plating, leather tanning, aerospace manufacturing, textile dye production — and inadequate municipal water filtration. (ewg)

The federal EPA has never set a separate maximum contaminant level for hexavalent chromium. The total chromium standard (100 parts per billion) treats chromium-3 (an essential nutrient) and chromium-6 (a known carcinogen) as the same substance. California's separate 10 parts per billion standard for chromium-6 was set in 2014, struck down by a state court in 2017 for inadequate cost-benefit analysis, and reinstated in modified form in 2024. The federal standard has not changed.

The real Erin Brockovich kept working environmental cases

Brockovich never went to law school. She kept her position as a paralegal and consultant, working with Masry & Vititoe and later other firms on subsequent toxic-tort cases. The Kettleman City case the film references in its closing beats — also chromium contamination — is one of dozens she has been involved in over three decades. As of the mid-2020s, she runs the Brockovich Research and Consulting firm and maintains a public role advocating for water quality policy. The real Edward Masry died in December 2005 of complications from cancer. He was seventy-three. (wikipedia, wikipedia — masry)

"About 99 percent of the time, it's the mothers. They are actually getting things done in their own city council, in their own backyard." — Erin Brockovich, Hollywood Reporter (2020)

What the film leaves out

The film's $333 million ending is the largest single victory of Brockovich's career. It is not a clean ending. The plaintiffs received money. The contamination remained. The town emptied out. PG&E's corporate behavior did not fundamentally change — the company has been involved in subsequent environmental scandals (San Bruno gas explosion, 2010; Camp Fire, 2018), filed for bankruptcy twice, and emerged each time with restructured liabilities.

The film's choice to end at the verdict — with Donna in tears and Erin handed a $2 million bonus — is a screenwriting choice, not a historical one. Susannah Grant's script (Susannah Grant) treats the case as a character study with a triumphant arc; the actual case is an ongoing environmental disaster with a partial financial settlement attached. Both readings are valid. The film's responsibility was to honor Erin's effort. The reader's responsibility is to remember that the cleanup is unfinished.

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