State tightens rules for sewage sludge used as fertilizer but leaves a loophole in place
As damaging algae blooms continue to afflict Florida, the state is taking steps to crack down on and track pollution from biosolids, the waste from sewage plants loaded with nutrients that can fuel blooms.
But the new rules, conservationists warn, continue to ignore a loophole for about 40% of the state’s waste.
At a final hearing last week, state environmental regulators said the new rules address two classes of sludge largely used in agriculture. Class AA, a third class, gets more highly treated to remove pathogens and heavy metals and is classified as a fertilizer not covered by the rules.
But environmentalists warn Class AA still contains phosphorus and nitrogen that feed blooms. Not including the class, they say, creates a gap in tackling worsening blooms that have increasingly fouled Florida waters and fueled saltwater blooms moving inshore.