Skip to main content
Oregon.gov Homepage

Advisory, Sampling, and LPHA Guidance

This information is intended to serve as a resource to lake managers and others who deal with algae blooms


children playing in lake Advisory Guidelines for Harmful Cyanobacterial Blooms in Recreational Waters (pdf)

Outlines the Oregon Health Authority criteria for issuing and lifting public health advisories due to cyanobacteria blooms.



Man taking water samples from lakeSampling Guidelines for Harmful Cyanobacterial Blooms in Recreational Waters (pdf)

Provides guidance for lake managers who intend to monitor water bodies when potentially harmful algae blooms are detected.



Available Labs for Cyanobacteria Analysis

Contains names of laboratories that can identify algae species and cell density counts, also toxin analysis.



Fast Facts: Blue-green Algae Q&A for Water System Operators

Technical overview intended for use by drinking water operators. Provides a general overview of blue-green algae and what to do if cyanobacteria and cyanotoxins are detected in source water.



CHAB Guidance for Local Public Health Authorities.pngCHAB Guidance for Local Public Health Authorities

Provides comprehensive information on cyanobacteria, cyanotoxins, symptoms, outreach, and how each LPHA can help OHA when blooms are identified in their counties.


Visit OHA Drinking Water Services for additional algae resources for drinking water.

Your browser is out-of-date! It has known security flaws and may not display all features of this and other websites. Learn how

×