Stormwater and graywater offer alternative water sources, but guidelines needed on their safe use

In the face of drought and major water shortages, the U.S. is increasingly turning to alternative water sources like stormwater and graywater, but guidelines and research on their risk to public health and the environment are needed to support decisions for safe use, says a new report from the National Academies of Sciences, Engineering, and Medicine.Graywater and stormwater could significantly supplement traditional potable water supplies using existing technology to capture and treat the water