All Group A public water systems must collect samples for coliform bacteria analysis. If distribution system sampling is coliform-positive, you must determine whether E. coli is in the groundwater by sampling all groundwater sources that were in use when you collected the coliform-positive distribution system sample. You must include this sampling in your coliform monitoring plan.
Due to the ongoing federal shutdown, Supplemental Nutrition Assistance Program (SNAP) food benefits in Washington ended on Oct. 31, 2025. DSHS has details on impacts as well as what clients can do to prepare for the loss of benefits.