Environmental groups are opposing another delay for new Florida water pollution rules designed to stop algae blooms from choking state waters.
They argued in court papers filed Wednesday in Tallahassee that federal law doesn't permit delaying a Friday deadline on grounds cited by the Environmental Protection Agency.
The federal agency wants a 120-day delay to continue talks with the Florida Department of Environmental Protection on its proposed alternative the EPA's rules.
U.S. District Judge Robert Hinkle approved similar requests in the past, but in June he said a postponement until Nov. 30 would be the last.
State officials as well as business, agriculture and utility interests support the state's proposal and oppose the federal rules, arguing they would be too costly.
Environmentalists say the state rules would be too weak.