Days after Harvey departed, 37 drinking water systems across the disaster area were shut down, and 188 had issued boil-water notices.36 In addition, approximately 425 wastewater treatment plants were inoperable.36 Altogether, about 149 million gallons of untreated sewage and industrial wastewater was reportedly released as a result of the hurricane.37 Image: © DIIMSA Researcher/Shutterstock.