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.
Percent occurrence of Giardia in water samples collected from Credit River area study sites between 2008 and 2010. WTPs, water treatment plants; STP, sewage treatment plant; 10 km, reference site located 10 km offshore from the mouth of the Credit River; influent, raw water entering WTPs; effluent, final treated wastewater leaving STP; surface, water collected at the surface above offshore WTP intakes, offshore STP outfall, and offshore of river mouths or 10 km offshore.
