Drinking water in Bellevue remains safe for consumption. According to the , prepared in accordance with the federal Safe Drinking Water Act, Bellevue’s drinking water meets or exceeds all state and federal drinking water standards. Both the

Treating Water For Safety

The City of Bellevue acquires water from Cascade Water Alliance, a regional water supplier.  Cascade, in turn, purchases water from the City of Seattle, which manages a large supply that originates from the Cedar and South Fork Tolt rivers in the Cascade Mountains. Both Bellevue and Seattle collect water samples annually and send them to laboratories that perform stringent testing.  The water has always passed federal standards.

City water is treated both to ensure that it is safe and to improve its taste and odor.  Water from the Cedar River is screened, flouridated and disinfected with chlorine and ozone.  A small amount of lime is also added to control corrosion to pipes.  Treatment for water from the Tolt River includes ozonation, filtration, flouridation, chlorination and pH and alkalinity adjustment.

Sources of Drinking Water

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