An environmental group has sued the city of Vacaville over the amount of a naturally occurring carcinogen in groundwater.
The San Francisco Chronicle reports the federal lawsuit was filed Monday at the U.S. District Court in Sacramento.
California River Watch is demanding that the Solano County city purge its water of chromium-6, the naturally occurring carcinogen that famously sickened Southern California residents as depicted in the movie "Erin Brockovich."
The newspaper reported that the environmental advocacy group also wants Vacaville leaders to give residents more notice of potential health problems associated with the contaminant and provide bottled water or another clean source to seniors and children.
The suit comes as Vacaville is already taking steps to bring its drinking water into compliance with California health regulations by 2020.
City spokesman Mark Mazzaferro declined to comment on pending litigation.