Despite the objection of environmental groups, state environmental regulators voted Tuesday to approve new standards that will increase the amount of cancer-causing toxins allowed in Florida’s rivers and streams under a plan the state says will protect more Floridians than current standards.

The Environmental Regulation Commission voted 3-2 to approve a proposal that would increase the number of regulated chemicals from 54 to 92 allowed in rivers, streams and other sources of drinking water, news media outlets reported. The final vote came after hours of discussion, protests and emotional testimony.