In 1999, the film Erin Brockovich, which depicted a real-life environmental lawsuit in the United States, was released and caused a nationwide sensation. The movie dramatized the investigation and legal battle of the ‘Hinkley Chromium Case,’ which occurred in California from 1993 to 1996 due to groundwater contamination. This incident represents a common type of environmental disaster in which harmful heavy metals pollute groundwater, causing various diseases among residents. However, it drew significant attention because the truth was uncovered through the perseverance of Erin Brockovich, a woman with a unique career and personality.