Columbia subject headings:
Drinking water--Health aspects--United States--Congresses.
Drinking water--Standards--United States--Congresses.
Drinking water--United States--Congresses.
Harvard subject headings:
Drinking water--Health aspects--United States--Congresses.
Drinking water--Standards--United States--Congresses.
Drinking water--United States--Congresses.
Princeton subject headings:
Drinking water--Hygienic aspects--United States--Congresses.
Drinking water--Standards--United States--Congresses.
Drinking water--United States--Congresses.