Public health advocate Erin Brockovich, who became a household name after she worked on a class-action lawsuit against the California-based Pacific Gas and Electric Co leaked toxic chemicals into groundwater, took President Donald Trump to task after it emerged that his administration has decided not to regulate two toxic chemicals commonly found in the public water supply.

A Politico report revealed that the Environment Protection Agency (EPA) is looking to no longer regulate utility companies to test or remove the chemicals PFOA and PFOS from their water supply under the Clean Water Act. The two chemicals are polyfluoroalkyl substances (PFAS), which have been used as key ingredients in consumer products like Teflon. Some studies have linked these chemicals to certain types of cancer.