(Portland, OR) -- The Portland Water Bureau has released its annual report on the quality of drinking water. More than 11-thousand tests are conducted during the year tracking more than 200 potential contaminants. The testing happens from the source at Bull Run Reservoir to taps in homes. Portlanders will receive a postcard in the mail with a QR code or internet address that will take you to the full report. It shows details about testing, investments in the drinking water system and what's being done to keep the system safe.