Plot
In 1993, Erin Brockovich is an unemployed single mother of three living in Los Angeles, California. After being injured in a car crash with a doctor, she files a lawsuit. Her lawyer, Ed Masry, expects to win, but Erin's explosive courtroom behavior under cross-examination loses her the case, and Ed cannot return her phone calls afterwards. One day, he arrives at work to find her in the office, apparently working. She says he told her things would work out, but they did not, and that she needed a job. Sympathizing with Erin, Ed gets her a paid job at the office.
Erin is given files for a real estate case where the Pacific Gas and Electric Company (PG&E) is offering to purchase the home of Donna Jensen, a Hinkley resident. Erin is surprised to see medical records in the file and visits Donna, who explains that she had kept all her PG&E correspondence together. Donna appreciates PG&E's help: she has had several tumors, and her husband has Hodgkin's lymphoma, but PG&E has always supplied a doctor at their own expense. Erin asks why they would do that, and Donna replies, "Because of the chromium". Erin begins digging into the case and finds evidence that the groundwater in Hinkley is seriously contaminated with carcinogenic hexavalent chromium, but PG&E has been telling Hinkley residents that they use a safer form of chromium. After several days away from the office doing this research, she is fired by Ed until he realizes she has been working the entire time and sees what she has found, and rehires her.
Erin continues her research and, over time, visits many of the community's residents and wins their trust. She finds many cases of tumors and other medical problems in Hinkley. PG&E's doctors have treated everyone and think the cluster of cases is just a coincidence, unrelated to the "safe" chromium. The Jensens' claim for compensation grows into a major lawsuit, but the direct evidence only relates to PG&E's Hinkley plant, not to corporate management.
Knowing that PG&E could slow any settlement for years through delays and appeals, Ed takes the opportunity to arrange for disposition by binding arbitration, but a large majority of the plaintiffs must agree to this. Erin returns to Hinkley and persuades all 634 plaintiffs to go along. While she is there, a man named Charles Embry approaches her to say that he and his cousin were PG&E employees, but his cousin recently died from the poison. The man says he was tasked with destroying documents at PG&E, but "as it turns out," he "wasn't a very good employee".
Embry gives Erin the documents, which include a 1966 memo proving corporate headquarters knew the water was contaminated with hexavalent chromium, did nothing about it, and advised the Hinkley operation to keep this secret. The judge orders PG&E to pay a $333 million settlement to be distributed among the plaintiffs.
In the aftermath, Ed hands Erin her bonus payment for the case but warns her he has changed the amount. She explodes into a complaint that she deserves more respect, but is astonished and left speechless to find that he has increased it to $2 million.