Slow sand filter maintenance
Subtitle: costs and effects on water quality
By: Raymond D. Letterman and Thomas R. Cullen, Jr
Contributors: Cullen, Thomas R; Water Engineering Research Laboratory
Publisher: U.S. Environmental Protection Agency, Water Engineering Research Laboratory
Published: 1985
Place of publication: Cincinnati, OH
Language: eng
Subjects: Water -- Purification -- Filtration; Water quality -- New York (State); Water treatment plants -- New York (State)
Notes: Caption title

At head of title: Project summary

Distributed to depository libraries in microfiche

"Aug. 1985."

"EPA/600/S2-85/056."