The Environmental Protection Agency says it will roll back limits on several types of what are known as forever chemicals in drinking water.

The Environmental Protection Agency said Wednesday that it plans to weaken limits on some “forever chemicals” in drinking water that were finalized last year, while maintaining standards for two common ones.

The administration said it wants to rescind and reconsider whether limits are needed for four PFAS that chemical companies are still producing and using in the U.S. — despite known health risks.