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Portland Water Bureau

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

GENERAL INFORMATION: 503-823-7404

MAILING ADDRESS: 1120 SW Fifth Ave, Suite 600, Portland, OR 97204

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Cryptosporidium Documents

This page contains documents and correspondence regarding compliance with the Long Term 2 Enhanced Surface Water Treatment rule (LT2) that requires treatment for Cryptosporidium.

Portland’s Bull Run Cryptosporidium Treatment Compliance

PWB Treatment Variance Request
June 6, 2011

Final Order Issued by OHA Granting Portland's Treatment Variance  
March 14, 2012

PWB Letter to OHA Regarding Bull Run Treatment Variance
March 8, 2017

OHA Order Revoking Treatment Variance for Cryptosporidium
May 19, 2017

OHA Amended Order Revoking Variance - Delayed Revocation
August 1, 2017

PWB Proposed Compliance Schedule and Interim Measures
October 9, 2017

OHA Extension of Variance Revocation Deadline
November 21, 2017

OHA Extension of Variance Revocation Deadline
December 13, 2017

PWB Bilateral Compliance Agreement
December 18, 2017

PWB Proposed Interim Measures Watershed Inspection and Monitoring Plan
January 12, 2018

Reports and Accomplishments

Monthly intake monitoring results are below.

*Monitoring and analysis was performed in accordance with PWB’s Treatment Variance for Cryptosporidium

2017 Bull Run Treatment Variance Annual Report for Water Year 2017
December 20, 2017