Water System Data for Download

Public Water Systems By Type
Type: Number of Systems Population Served
Community 2,209 6,289,836
Nontransient noncommunity (NTNC) 318 674
Transient noncommunity (TNC) 1,577 5,776
Total Group A Water Systems 4,105 6,285,337
Total Group B Water Systems 13,411 111,004
Total Group A and Group B Water Systems 17,523 6,407,351

Data For Download

These files contain public water system general and source information for Washington State Group A and Group B water systems.

Updated 12/05/2018

For questions regarding the files on this page, e-mail the Office of Drinking Water.

Public Disclosure Statement

The information provided in this website is believed to be accurate and reliable. However, the Washington State Department of Health (DOH) assumes no responsibility for errors in the content of the information provided. Further, DOH assumes no responsibility for the use of the information provided. Information provided is considered public information and may be distributed or copied.