Authored By: Rupal Barjatya
Symbiosis Law School, Pune
Case Summary: Anderson, Et Al. V. Pacific Gas & Electric Company Rupal Barjatya
CASE TITLE & CITATION
Anderson, et al. v. Pacific Gas and Electric Company (1996)
Citation: Superior Court for County of San Bernardino, Barstow Division, File No. BCV 003001
Settlement Date: 2 July 1996
COURT NAME & BENCH
Court: Superior Court of California, County of San Bernardino (Barstow Division)
Judge: LeRoy A. Simmons2
Arbitration Panel: Retired judges employed by JAMS/Endispute, an alternative dispute resolution firm. Arbitration proceedings were conducted in San Francisco and Los Angeles.3
DATE OF JUDGMENT
The case was settled on 2 July 1996 following arbitration proceedings that commenced in 1993.4
PARTIES INVOLVED
Plaintiffs/Appellants
Anderson, et al. – 648 residents of Hinkley, California, who claimed serious health problems including cancers, tumours, Hodgkin’s disease, and respiratory ailments allegedly caused by contaminated groundwater.5
Legal Representation: Edward L. Masry (Masry & Vititoe), Thomas Girardi, Walter Lack, with legal clerk Erin Brockovich conducting pivotal investigation.
Defendant/Respondent
Pacific Gas and Electric Company (PG&E) – Major utility company operating a natural gas compressor station in Hinkley, California, built in 1952.
FACTS OF THE CASE
Between 1952 and 1966, PG&E operated a compressor station in Hinkley, using hexavalent chromium (chromium-6) to prevent rust in cooling tower machinery. PG&E discharged approximately 370 million gallons of chromium-contaminated wastewater into unlined storage ponds, allowing the toxic substance to percolate into the underground aquifer.
The contamination plume initially extended approximately two miles long and one mile wide. Chromium levels in groundwater averaged 1.19 parts per billion (ppb), with peaks at 20 ppb, substantially exceeding California’s later proposed health goal of 0.02 ppb.
The Regional Water Quality Control Board placed the site under regulation in 1968, but PG&E failed to inform residents about the contamination until 1987.6 During this period, Hinkley residents relying on groundwater wells experienced a cluster of serious illnesses. PG&E provided medical care through company doctors who told residents their health problems were coincidental and that the company used a ‘safer form of chromium.’7
In 1993, Erin Brockovich, working for attorney Edward Masry, discovered medical records attached to real estate files involving PG&E’s offer to purchase a Hinkley home. Her investigation uncovered extensive documentation showing PG&E had knowledge of contamination but concealed information from residents. She interviewed numerous residents, establishing a pattern of serious illnesses throughout the community.
ISSUES RAISED
- Whether PG&E’s discharge of hexavalent chromium caused groundwater contamination that resulted in residents’ health problems.
- Whether PG&E acted negligently by using unlined ponds and failing to prevent groundwater contamination.
- Whether PG&E knowingly concealed contamination information and fraudulently misrepresented chromium safety.
- Whether PG&E had a duty to inform residents about contamination and health risks.
- Whether fear of future illness and medical monitoring costs constituted compensable injuries.
- Appropriate compensation measures for varying degrees of exposure and health impacts.8
ARGUMENTS OF THE PARTIES
Arguments of the Plaintiffs
Negligence: Plaintiffs argued PG&E negligently disposed of hexavalent chromium in unlined ponds, knowing or should have known this would contaminate groundwater, falling below reasonable utility company standards.9
Knowledge and Concealment: Evidence showed PG&E had knowledge of contamination since the 1960s but failed to inform the public or regulatory authorities until 1987. Internal documents revealed the company concealed information and doctored reports.10
Fraudulent Misrepresentation: PG&E actively misled residents by claiming it used ‘safe’ chromium when actually using carcinogenic hexavalent chromium. Company doctors allegedly told residents their illnesses were unrelated to water quality despite clear patterns suggesting environmental causation.11
Scientific Evidence: Plaintiffs relied on a 1987 Chinese epidemiological study by Jian Dong Zhang showing strong links between chromium-6 and cancer. They documented a statistically significant disease cluster pointing to environmental causes.12
Pattern of Illness: Evidence included multiple cancer cases, tumours, and respiratory problems affecting families throughout Hinkley, establishing patterns beyond coincidence.13
Property Damage: Plaintiffs argued property values were significantly diminished, leaving residents unable to sell contaminated homes.14
The plaintiffs initially demanded $250 million, eventually seeking $400 million during arbitration as more claimants joined.15
Arguments of the Defendant
Insufficient Scientific Evidence: PG&E argued hexavalent chromium levels were not harmful, presenting toxicologists who testified that drinking low chromium-6 doses does not cause cancer. The company claimed chromium-6 converts to safer chromium-3 when exposed to stomach acid.16
Expert Testimony: PG&E engaged experts like Dr Steven Patierno, who co-authored papers arguing chromium-6 is not genotoxic and posed no significant health risk at levels present in Hinkley’s water.17
Lack of Direct Causation: PG&E contended plaintiffs’ health problems could not be definitively linked to groundwater contamination, arguing illnesses could be explained by lifestyle, genetics, or other environmental factors. 18
Procedural Challenges: PG&E initially sought dismissal, arguing the com plaint lacked sufficient facts or legal grounds.19
Compliance with Regulations: PG&E maintained it legally discharged wastewater and came under regulatory oversight in 1968.
JUDGMENT / FINAL DECISION
The case was resolved through binding arbitration. Arbitration for the first 40 claimants resulted in awards totalling approximately $120 million, signalling strong outcomes for remaining plaintiffs.20
After evaluating early arbitration results and reviewing approximately one million documents and several hundred depositions, PG&E negotiated a global settlement.21
Settlement Terms:
On 2 July 1996, parties executed a settlement for $333 million, then the largest settlement in a direct-action lawsuit in United States history, resolving claims for 648 plaintiffs.22
Financial distribution:
- Total settlement: $333 million
- Legal fees (40% contingency): approximately $133 million
- Expenses: $10 million
- Net to plaintiffs: approximately $196 million23
Individual awards varied significantly based on exposure duration, health problem severity, medical evidence strength, property damage, and claimant age. Awards ranged widely, with average payouts estimated at approximately $300,000 per plaintiff, though one sample found an average of $152,000 amongst 81 plaintiffs interviewed.24
LEGAL REASONING / RATIO DECIDENDI
Although resolved through arbitration without formal judicial opinion, several legal principles emerged:
Causation in Toxic Tort Cases: The case established that plaintiffs can prove causation through epidemiological studies, disease cluster analysis, expert testimony, and circumstantial evidence, even without absolute scientific certainty in individual cases. The weight given to the Zhang study validated international scientific research in establishing causation.25
Corporate Duty of Disclosure: Companies have affirmative obligations to disclose known environmental hazards to affected communities and regulators. PG&E’s concealment from the 1960s until 1987 constituted serious breach of duty. Corporations cannot insulate themselves from liability by providing medical care through doctors who minimize contamination connections.26
Compensable Fear and Future Risk: Fear of future illness and ongoing medical monitoring needs constitute compensable injuries in toxic tort cases, representing an evolution where exposure to carcinogens without present disease manifestation supports recovery.27
Standards for Corporate Negligence: The case exemplified required standards of care for corporations handling hazardous substances. Using unlined ponds for toxic wastewater when groundwater contamination is foreseeable falls below reasonable care standards.28
Punitive Element: The settlement’s magnitude reflected not only compensatory damages but implicit punitive recognition of PG&E’s fraudulent conduct, concealment, and malice.29
CONCLUSION / OBSERVATIONS
Impact and Significance
Legal Precedent: The case established important precedents in environmental tort law regarding corporate liability for groundwater contamination, disclosure duties, and compensability of fear of future illness, setting benchmarks for toxic tort settlement values.
Regulatory Impact: The case prompted significant California environmental law changes. In July 2014, California became the first state acknowledging links between ingested hexavalent chromium and cancer, establishing a Maximum Contaminant Level of 10 ppb – substantially more protective than federal EPA standards.
Scientific Awareness: The case brought national attention to hexavalent chromium dangers, sparking ongoing scientific debate. The National Toxicology Program’s 2007 research provided evidence that high chromium-6 doses caused cancers in rats and mice, prompting EPA intensified scrutiny.
Cultural Impact: The 2000 biographical film ‘Erin Brockovich,’ starring Julia Roberts (Academy Award winner), brought environmental justice issues into mainstream consciousness, inspiring public interest in corporate environmental accountability.
Subsequent Litigation: In 2006, PG&E paid an additional $295 million settling cases involving 1,100 people statewide for hexavalent chromium claims at multiple compressor stations. In 2008, PG&E settled the last Hinkley-specific claims for $20 million.
Community Impact: Despite financial settlement, long-term impact on Hinkley has been devastating. The contamination plume continued expanding, requiring additional property buyouts. PG&E purchased and demolished approximately 300 properties. The town’s population dwindled to less than half its 2012 level, with schools and post offices closing as residents departed.
Cleanup Challenges: By 2014, chromium had migrated to lower aquifers, causing contamination in previously unaffected areas. The plume expanded to approximately eight miles long and two miles wide by 2015. Despite remediation efforts including concrete barriers and ethanol pumping to convert chromium-6 to chromium-3, success has been limited.
Critical Reflection
The Anderson v. PG&E case represents a landmark in environmental tort litigation, demonstrating corporate accountability for environmental contamination and public health harms. However, it reveals litigation’s limitations as remedy for environmental disasters. Monetary compensation cannot restore communities, reverse health damage, or fully compensate for life disruptions.
The case raises questions about regulatory oversight adequacy and the balance between corporate disclosure obligations and legal liability. PG&E’s 22-year disclosure delay suggests more robust regulatory mechanisms and stricter requirements are needed.
Furthermore, the case illustrates the critical role individuals like Erin Brockovich play in exposing corporate wrongdoing and protecting public health. Her persistence in investigating unusual documentation and engaging directly with affected community members was essential to bringing this case to light.
Finally, the case serves as sobering reminder that environmental contamination cases often lack satisfactory conclusions. Despite settlement, cleanup efforts, and regulatory interventions, Hinkley remains contaminated decades later, and former residents continue suffering health effects. The case exemplifies both possibilities and limitations of using tort law to address environmental justice issues.
Reference(S):
1 Anderson, et al. v Pacific Gas and Electric Company, Superior Court for County of San Bernardino, Barstow Division, File No BCV 00300 (Settlement 2 July 1996).
2 Kavalauskas C, ‘Anderson v. Pacific Gas and Electric’ (California PreLaw Land, 4 November 2023) https://ca.prelawland.com/post/733069347789193216/anderson-v-pacific-gas-and-electric accessed 28 December 2025.
3’Erin Brockovich and her case against Pacific Gas and Electric’ (UK Essays) https://www.ukessays.com/essays/history/erin-brockovich-and-her-case-against-pacific-gas-and-electric-history essay.php accessed 28 December 2025.
4ibid.
5 Brockovich E, ‘Hinkley Groundwater Contamination’ (DRB Capital, 10 May 2024) https://www.drbcapital.com/pacific-gas-electric-hinkley-case/ accessed 28 December 2025.
6 Brockovich (n 5).
7 Environmental Working Group, ‘Chrome-Plated Fraud’ (2005) https://www.ewg.org/research/chrome-plated fraud accessed 28 December 2025.
8 Kavalauskas (n 2).
9‘Erin Brockovich and her case against Pacific Gas and Electric’ (n 3).
10 Environmental Working Group (n 7).
11 ibid.
12 ibid.
13 Brockovich (n 5).
14 Kavalauskas (n 2).
15 ‘Erin Brockovich and her case against Pacific Gas and Electric’ (n 3).
16 Environmental Working Group (n 7).
17 ibid.
18 Kavalauskas (n 2).
19 ‘Erin Brockovich and her case against Pacific Gas and Electric’ (n 3).
20 ‘The 5 Most Famous Personal Injury Cases’ (Franco Law Firm, 10 January 2022) https://www.francofirm.com/the-5-most-famous-personal-injury-cases/ accessed 28 December 2025. 21 ‘Erin Brockovich and her case against Pacific Gas and Electric’ (n 3).
22 Brockovich (n 5).
23 ibid.
24 Environmental Working Group (n 7).
25 ibid.
26 Brockovich (n 5).
27 Kavalauskas (n 2).
28 ‘Erin Brockovich and her case against Pacific Gas and Electric’ (n 3).
29 Environmental Working Group (n 7).
