- Failed some Health Guidelines
- Failed some Legal Limits
- Met all Reporting and Monitoring Requirements
- Uses Chlorine disinfectant
Seattle is known to have some of the cleanest tap water in the country. Seattle Public Utilities (SPU) provides the city with water from two local, protected sources - the Cedar River Watershed and the South Fork Tolt River Watershed located in the mountains around Seattle. In an effort to protect these watersheds, the city of Seattle purchased the 90,000+ acres of land around and atop the watersheds. Water is treated with chlorine, ozone and ultraviolet light to reduce contamination. Once the water leaves the treatment center, the main concern for residents is lead or copper contamination from pipes and plumbing as well as pipe breaks or leaks where contamination can enter the water supply.
Seattle, WA Water Quality Recent Violations
There were no health violations for in the 2010-2012 reporting periods
There were no reporting, montioring or other reported violations for in the 2010-2012 reporting periods
Seattle, WA Water Quality Historical Violations
|Contaminant||Total Tests||Positive Results||Above Health Limits||Above Legal Limits||EPA Regulated||Max Result||Health Limit||Legal Limit|
|Nitrate & nitrite||5||5||0||0||Yes||1.00||10||10|
|Total haloacetic acids (HAAs)||12||12||0||0||Yes||41.80||70||60|
|Total trihalomethanes (TTHMs)||14||14||0||0||Yes||64.50||-||80|
15 Contaminants were detected, 1 above legal limits, 1 above health guidelines, and 13 below limits for water suppliers serving Seattle, WA between 2004 and 2009.
72 Water Contaminants were tested for in the Seattle, WA area but not found in drinking water between 2004 and 2009.
Data Source: NYTimes.com
The scores and results above reflect a summary of the historical drinking water testing results that has been documented by the EPA and other sources. The color coding of the symbols was developed by WaterFilterComparisions.com as an easy way for individuals to gauge the historical effectiveness of Seattle water suppliers in meeting legal and health regulations in providing clean drinking water. This should only be used as a guide, and WaterFilterComparisons recommends you contact Seattle water suppliers to better understand the quality of the drinking water in Seattle, .