A Colorado Springs law firm said it is readying a lawsuit targeting the manufacturers of a firefighting foam believed to have contaminated drinking water in Security, Widefield and Fountain.

McDivitt Law Firm said it plans to file a lawsuit this week over the fouling of the Widefield Aquifer, which supplies drinking water to thousands of residents in southern El Paso County.

McDivitt is partnering with a New York firm, Napoli Shkolnik, PLLC, which has been running television ads in recent months to woo clients.

Mike McDivitt, the firm’s founder, said about 1,000 people have retained his firm, and many more residents have expressed interest.

The possible move comes on the heels of another federal suit filed earlier this week against 3M, Ansul Foam of Wisconsin and National Foam of Pennsylvania. The companies manufactured and sold a military firefighting foam laden with chemicals associated with a host of health ailments, including cancer.

The first suit was filed by the Hannon Law Firm of Denver on behalf of three customers receiving contaminated water.

McDivitt’s suit was expected to be filed Wednesday, but he said the filing was delayed.