The Surface Water Treatment Rule (SWTR) requires the District to conduct a Watershed Sanitary Survey (WSS) on an ongoing basis. The objective of the WSS is to assess the source water quality of the Yuba/Bear River to ensure the ability of the existing water treatment plants to continue to provide their customers with drinking water that meets all drinking water standards.
The purpose of the Surface Water Treatment Rules (SWTRs) is to reduce illnesses caused by pathogens in drinking water. The disease-causing pathogens include Legionella, Giardia lamblia, and Cryptosporidium.
The SWTRs requires water systems to filter and disinfect surface water sources. Some water systems are allowed to use disinfection only for surface water sources that meet criteria for water quality and watershed protection.
Click below to read the most recent survey: