GENERAL INFORMATION: 503-823-7404
1120 SW Fifth Ave, Suite 600, Portland, OR 97204
The Bul Run source has low levels of Cryptosporidium, resulting in a variance to the treatment requirements of LT2
The Long Term 2 Enhanced Surface Water Treatment Rule (LT2) was promulgated by the federal Environmental Protection Agency (EPA) to “reduce illness linked with the contaminant Cryptosporidium and other disease-causing microorganisms in drinking water.”
There are two major requirements of the LT2 rule that apply to Portland’s drinking water system:
The City advocates that EPA revise the source water monitoring requirements of the LT2 rule to incorporate recently developed genotyping methods for any detected Cryptosporidium species to provide more relevant public health information to water customers.
Portland developed a comprehensive treatment variance request based on the results of a year-long water quality sampling and study of Bull Run water.
Portland's strategy for compliance with the uncovered finished drinking water reservoir requirements of LT2.
Description and documentation legal challenge to LT2.
This page contains documents and correspondence regarding compliance with LT2.