Test results show that New Canaan’s waterways rank among the cleanest in the region, officials say. At seven E. coli data-testing sites located on New Canaan’s stretches of the Noroton and Rippowam Rivers—sites each tested at least 10 times from May to September last summer—officials found that just one location had a bacteria level that failed state criteria. And that one location—along Ponus Ridge, just below Collins Pond—was only “marginally failing” and within the margin of error, according to marine ecologist Dr. Sarah Crosby, director of Harbor Watch. “I am not overly concerned about there being an acute problem,” Crosby told members of the Conservation Commission during their regular meeting, held April 11 at Town Hall. Asked why New Canaan appears to have cleaner waterways than other towns in Fairfield County, Crosby said “a lot of it has to do with keeping infrastructure up-to-date.”
“A lot has to do with public understanding of things like septic maintenance, and the town regulations around septic systems can have a big impact, and then land use is a big part of it as well,” she said.