<P> In 2003, Brockovich received settlements of $430,000 from two parties and an undisclosed amount from a third party to settle her lawsuit alleging toxic mold in her Agoura Hills, California, home . After experiencing problems with mold contamination in her own home in the Conejo Valley, Brockovich became a prominent activist and educator in this area as well . </P> <P> Brockovich and Masry filed suit against the Beverly Hills Unified School District in 2003, in which the district was accused of harming the health and safety of its students by allowing a contractor to operate a cluster of oil wells on campus . Brockovich and Masry alleged that 300 cancer cases were linked to the oil wells . Subsequent testing and epidemiological investigation failed to corroborate a substantial link, and Los Angeles County Superior Court Judge Wendell Mortimer granted summary judgment against the plaintiffs . In May 2007, the School District announced that it was to be paid $450,000 as reimbursement for legal expenses . </P> <P> Brockovich assisted in the filing of a lawsuit against Prime Tanning Corp. of St. Joseph, Missouri, in April 2009 . The lawsuit claims that waste sludge from the production of leather, containing high levels of hexavalent chromium, was distributed to farmers in northwest Missouri to use as fertilizer on their fields . It is believed to be a potential cause of an abnormally high number of brain tumors (70 since 1996) around the town of Cameron, Missouri, which is currently being investigated by the EPA . </P> <P> In June 2009, Brockovich began investigating a case of contaminated water in Midland, Texas . "Significant amounts" of hexavalent chromium were found in the water of more than 40 homes in the area, some of which have now been fitted with state - monitored filters on their water supply . Brockovich said "The only difference between here and Hinkley is that I saw higher levels here than I saw in Hinkley ." </P>

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