Drinking water tech tips for surveyors
Subtitle: chlorine contact time for small water systems.
Contributors: Washington (State). Office of Drinking Water.
Series: DOH pub -- #331-343.; DOH publication -- #331-343.
Publisher: Washington State Dept. of Health, Division of Environmental Health, Office of Drinking Water
Published: 2006
Place of publication: [Olympia, Wash.]
Language: eng
Subjects: Water -- Purification -- Chlorination -- Washington (State); Drinking water -- Purification -- Washington (State)
Other titles: Chlorine contact time for small water systems.
Notes: Caption title.

"June 2006."

Also available on the Internet.