Smart Sponge: So Far, So Good
Since their installation in November, the filters, which are cleaned every few months, have removed an estimated 14,000 pounds of debris from stormwater, officials said yesterday. … water emerging from the filtered drains was 75 percent cleaner than water that entered the harbor from unfiltered drains.
Because stormwater is so contaminated, health officials automatically ban oyster harvesting after a rainstorm. The Norwalk Islands are rich in oysters, so if the filters work, maybe the beds will be able to stay open more often.