... testing, water sources, and watershed protection. All of theseimportant topics are thoroughly discussed in Handbook of Water and Wastewater Treatment Plant Operations. Though directed at water and ... maintenance of clean water for survival of fish, bathing, and recreation; and (4) generally conser-vation of water quality for future use.The purpose of water supply systems and wastewater treatment ... plants—Handbooks, manuals, etc. 2. Sewage disposal plants—Handbooks, manuals, etc. 3. Water PuriÞcation—Handbooks, manuals, etc. 4. Sewage—PuriÞcation—Handbooks, manuals, etc. I. Title: Handbook of...