The lawsuit, which will be filed in a U.S. district court, is being led by Santa Clara County and San Francisco. Portland, New Haven and King County are also signing on. The legal action comes the day after the Department of Justice sued the city of Chicago and the state of Illinois over its sanctuary policies.

Santa Clara County is suing over a dozen companies for exposing residents to the toxic “Forever Chemicals.” Lawyers claim the companies have sparked an environmental and health crisis, after the chemicals were detected in local water supplies.

San Francisco and other cities and counties nationwide announced a plan to fight back Friday against the Trump administration’s attempt to require them to cooperate with federal immigration agents in mass deportations,