Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Private water supplies connected for emergency purposes to public supplies are a potential source of pollution. Check valves which a decade ago were considered safe have been subject to such changes in design as to be now condemned. Health officers should be on their guard against any commercial economy here that means health risk to their communities.
View on publisher site
PDF (711.8 KB)
