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Seattle’s drinking water sources don't contain lead. However, lead can leach into water from plumbing materials, such as lead-based solder and brass fixtures.
There are a few simple steps you can take in the home to reduce the risk of lead in your drinking water:
To have your home water tested for lead, contact a certified lab near your area. The Washington State Department of Ecology is responsible for certifying labs in Washington and maintains a database where you can find labs certified to test drinking water. Analysis costs range from $25 to $50. Please contact the laboratories directly for sample collection procedures and prices.
Seattle Public Utilities’ Water Quality Laboratory is not set up to test high volumes of residential samples for lead.
SPU began sampling and analysis to meet the EPA Lead and Copper Rule in 1992. The Lead and Copper Rule sets action levels of 15 ug/L (0.015 mg/L) for lead and 1300 ug/L (1.3 mg/L) for copper. A utility must make treatment changes or meet other requirements if the action level for either lead or copper is exceeded in more than 10% of the residential samples.
We have put a tremendous amount of effort into reducing lead and copper levels from home plumbing materials. North-end reservoirs have been covered and gas chlorination has been converted to hypochlorination for distribution system reservoirs. The Tolt Treatment Facility was brought online in 2001 and includes ozonation, coagulation, flocculation, direct filtration, fluoridation, pH control, alkalinity adjustment, and chlorine disinfection.
These improvements have resulted in substantially lower lead levels in home tap samples. Seattle now qualifies for reduced monitoring for lead and copper (50 homes once every 3 years). Seattle has met all requirements of the lead and copper rule since 2003.