Columbia subject headings:
Water quality management--United States--Cost effectiveness.
Water quality management--United States.
Water--Pollution--Law and legislation--United States.
Harvard subject headings:
Water quality management--United States
Water quality management--United States--Cost effectiveness.
Water--Pollution--Law and legislation--United States
Princeton subject headings:
Water quality management--United States--Cost effectiveness.
Water quality management--United States.
Water--Pollution--Law and legislation--United States.