RIVERSIDE – State Attorney General Jerry Brown and Riverside County District Attorney Rod Pacheco are suing a cement factory, saying it exposed neighbors to toxic cement dust without warning them.

The suit, filed Thursday in Superior Court, seeks to get TXI Riverside Cement Co. to stop its practices that are causing exposure to hexavalent chromium. The carcinogen, the same one featured in the movie “Erin Brockovich,” has been carried by dust into neighborhoods near the factory in the Rubidoux area.

Last month, the company agreed to pay $600,000 in penalties and spend $400,000 toward site improvements as part of an agreement with regional air quality officials to reduce its hexavalent chromium emissions.

Other provisions in the settlement include the company hiring someone to monitor the plant for compliance to air district regulations.