OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 00379
PWS Name: JOINT WATER COMMISSION
 
Who Was Contacted: Sarah Honious
Contact Phone: -- (Email address hidden)
Contact Date: 06/01/2021
Contacted By: ALFAFARA, NICOLE (DWP)
Contact Method/Location: Email
 
Assistance Type: OTHER WATER QUALITY - Hagg Lake Algal Bloom
Reasons: Cyanotoxins
 
Details: DWS Staff were informed on 6/1/2021 that an algal bloom was observed in a supply source (Hagg Lake) during routine sampling. A sample cyanobacteria cellular density greater than 2 million cells/mL lead to the system taking multiple proactive actions (regular visual reservoir inspections and weekly investigative cyanobacteria/cyanotoxin sampling at both Hagg Lake and the JWC Water Treatment Plant intake in addition to the regulatory intake sample).

6/2/2021 Update: The regulatory intake sample taken 6/1/2021 was determined to be non-detect for Total Microcystins and Cylindrospermopsin.

6/4/2021 Update: Results for investigative toxin samples collected 6/1/2021 along the Hagg Lake shoreline and at the WTP intake were non-detect for both Total Microcystins and Cylindrospermopsin. The intake regulatory sample taken 6/1/2021 was determined to be non-detect for Total Microcystins and Cylindrospermopsin. The investigative toxin samples collected 6/2/2021, in Hagg Lake were non-detect for Total Microcystins and Cylindrospermopsin.

6/11/2021 Update: Results for investigative toxin samples collected 6/9/2021 along the Hagg Lake shoreline and at the WTP intake were non-detect for both Total Microcystins and Cylindrospermopsin. Cyanobacteria were absent of investigative samples collected 6/9/2021, in Hagg Lake and along the shoreline. The system will conduct weekly visual inspections and continue investigative sampling of Hagg Lake every 2 weeks.


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