POLLUTION OF BOUNDARY WATERS

REPORT

OF THE

CONSULTING SANITARY ENGINEER

UPON

REMEDIAL MEASURES

MARCH 8, 1916

WASHINGTON

GOVERNMENT PRINTING OFFICE

1918

1592
A116
1918

CONTENTS.

Pago.

Scope and purpose of the present report.....

Extent and seasonal distribution of pollution, as disclosed in the Progress Report.

General.....

Seasonal variation..........

Extent of pollution..

Above Lake Huron....

St. Clair River and Lake.

Detroit River......

Lake Erie and Niagara River...

Lake Ontario and the St. Lawrence.

St. Johns River......

Variations from average conditions..

Significance of pollution data...

Relation to water supplies....

Opinion of consulting engineers..

Application......

Necessary effective dilution....

Extent of sewage treatment proposed.

Distribution of responsibility...

Engineering investigations..

Organization and scope............

Methods of treatment applicable...

Oxidation processes...

Removal of suspended matter..

Removal of bacteria...

Drainage canals.....

General consideration....

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Appendix 1.-Engineering Studies, Detroit and St. Clair Rivers-report of H. C. McRae, district engineer, and Irving P. Kane,

assistant engineer....

Table of contents...

Appendix 2.-Engineering Studies, Niagara River-report of F. C. Tolles, district engineer....

Table of contents.....

TABLE I. Seasonal distribution of B. coli in the St. Clair, Detroit, Niagara, and St. Lawrence Rivers, 1913....

II. Seasonal distribution of typhoid fever (total deaths) and B. coli (total positive tests recorded in 1 c. c.) in Buffalo, 1906–

1914.....

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III. Extent of pollution of the Detroit River..

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IV. Extent and seasonal distribution of pollution, Detroit River. Computed from mean seasonal value and seasonal distri-

bution curve...

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V. Extent of pollution of the Niagara River.....

VI. Extent and seasonal distribution of pollution, Niagara River.

VII. Extent of pollution, Detroit and Niagara Rivers, in terms of contributing population.

XI. Present value, operating, fixed, and total annual charges of water and sewerage works in American cities..

PLATES.

PLATE I. Seasonal distribution of B. coli in St. Clair, Detroit, Niagara, and St. Lawrence Rivers