Fecal matter is also prevalent in the canal. In 2009, a local environmental "neighborhood watch" called Riverkeeper tested canal water immediately following heavy rains and sewage flooding. It reported "Enterococcus" at levels of 17,329 cells per 100 milliliters, with anything above 104 cells per 100 milliliters being considered unsafe; "Enterococcus" is considered an indicator of other possible pathogens. As of 2013, fecal matter was still present in Gowanus' water at levels of parts per hundred. A more usual measurement for a waterway would be parts per million.