Columbia subject headings:
Drinking water--Contamination--Government policy--United States.
Drinking water--Health aspects.
Sanitation--Government policy--United States.
Water resources development--Government policy--United States.
Water-supply--Economic aspects.
Water-supply--Political aspects.
Harvard subject headings:
Drinking water--Contamination--Government policy--United States.
Drinking water--Health aspects
Sanitation--Government policy--United States.
Water resources development--Government policy--United States
Water-supply--Economic aspects.
Water-supply--Political aspects.
Princeton subject headings:
Drinking water--Contamination--Government policy--United States.
Drinking water--Health aspects.
Sanitation--Government policy--United States.
Water resources development--Government policy--United States.
Water-supply--Economic aspects.
Water-supply--Political aspects.