Water Quality Monitoring

Before the water reaches your tap, samples from the water treatment plants, reservoirs, and numerous locations throughout the distribution system are tested. More than 100 tests are performed each day by treatment plant operators. Additional water testing is also performed at the City's Water Quality Lab. Lab personnel routinely conduct more than 3,000 drinking water tests each year. Hundreds of other required tests are performed by state-certified contract labs that specialize in drinking water analyses. Results from all these tests are summarized and sent monthly to the Oregon Health Division for review.