Columbia subject headings:
Sewage disposal plants--Law and legislation--United States.
Water--Pollution--Law and legislation--United States.
Harvard subject headings:
Environmental law--United States
Sewage disposal plants--Law and legislation--United States.
Water--Pollution--Law and legislation--United States
Princeton subject headings:
Sewage disposal plants--Law and legislation--United States.
Water--Pollution--Law and legislation--United States.