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The City of Portland, Oregon

Portland Water Bureau

From forest to faucet, we deliver the best drinking water in the world.

Customer Service: 503-823-7770


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Test Results & Reports

Drinking water test results and reports

The Portland Water Bureau conducts compliance monitoring on a daily basis to ensure water quality meets EPA standards. Every year, water quality technicians regularly use about 90 sampling stations around the city to collect over 11,000 water samples. Over 49,000 water quality tests are conducted on those samples at the Portland Water Bureau Water Quality Laboratory.

The results from the water quality tests are used to ensure that the Portland Water Bureau and Portland's drinking water meets all state and federal regulations. Results are regularly reported to the EPA, State of Oregon, and the public. Some of these results and reports are available here.


In this section, you will find:

Water Quality Summary

A summary of water quality from Bull Run and groundwater sources.

Triannual Water Quality Reports

These reports are prepared three times per year and provide detailed monitoring results for those needing technical data.

Other Water Quality Reports

The Portland Water Bureau provides several water quality reports to the public, including the Triannual Water Quality Analysis and annual Watershed and Treatment Variance reports.

Bacterial Monitoring

How the Portland Water Bureau samples and tests for bacterial contamination.

Sign-up for Water Quality Notifications

Sign-up to receive notifications by email or fax from the Portland Water Bureau when there are changes in the drinking water source or when significant adjustments are made to water treatment.