WATER WORKS PRACTICE

The American Water Works Association is not responsible, as
a body, for the facts and opinions advanced in the Manual.

TI

COPYRIGHT 1925

THE WILLIAMS & WILKINS COMPANY

Made in United States of America

PUBLISHED SEPTEMBER, 1925

COMPOSED AND PRINTED AT THE

WAVERLY PRESS

FOR

THE WILLIAMS & WILKINS COMPANY

BALTIMORE, MD., U. S. A.

CONTENTS

INTRODUCTION

CHAPTER I

Development of modern water works-Significance of water supply in dis-

ease incidence-Jurisdiction of state and federal authorities over water

supplies-International aspects of water pollution-Liability for disease

contracted from a water supply-Beautification of water works properties 3

COLLECTION OF WATER

CHAPTER II

Allocation of streams for municipal water supply-Compensation in

money and in kind for water diversion-Watershed yields and required

storage-Provision for flood discharge in the design of spillways and

other structures.

37

Objectionable limits of various substances and their relation to practical

problems-Standards of water supply quality-Bacteriological standard

for drinking water, 1914-Report of Advisory Committee on Official

Water Standards, 1925.

73

98

111

TREATMENT OF WATER

CHAPTER VI

Self-purification of streams, lakes and reservoirs-Advantages of outlets

at different levels for deep reservoirs-Current practice with algaecides.. 153

Chlorination..

CHAPTER VII

CHAPTER VIII

Aeration Natural subsidence, coagulation and rapid sand filtration—

Slow sand filtration-Double filtration-Covers for reservoirs for fil-

tered waters and ground waters.

582959

173

189