Cedar river watershed

http://www.seattle.gov/util/EnvironmentConservation/OurWatersheds/CedarRiverWatershed/CedarRiverEducationCenter/index.htm

http://www.kingcounty.gov/environment/wtd/About/System/CSOFacilities/Carkeek.aspx

Brightwater

http://www.kingcounty.gov/environment/brightwater-center/education/tour-plant.aspx

https://www.google.com/search?q=wastewater+treatment+plant+photos&rlz=1Y3NDUG_enUS515US516&oq=waste+treatment+plant+ph&aqs=chrome.1.69i57j0l3&client=tablet-android-asus-nexus&sourceid=chrome-mobile&espv=1&ie=UTF-8#biv=i%7C1%3Bd%7C2WRIiMaByByecM%3A

Wastewater: Where does it go?: http://youtu.be/oaXth88i7rk

Water treatment

A Tour of the Sunnyside Wastewater Treatment Plan…: http://youtu.be/whjEikBiOFo