OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 00379
Who Was Contacted: Zac Bertz
Contact Phone: 503-758-4446 (Email address hidden)
Contact Date: 06/16/2021
Contact Method/Location: Phone
Assistance Type: OTHER WATER QUALITY - Chlorine Supply Shortage
Reasons: Chlorine
Details: 6/16/21: System reached out to DWS in response to the possible future chlorine supply shortage inquiring about 1) ceasing prechlorination to conserve sodium hypochlorite supply and 2) temporarily feeding 12.5% sodium hypochlorite to help extend chlorine gas supply.
System ceased prechlorination the afternoon of 6/16/21.

6/17/21: DWS Staff informed system ceasing prechlorination was an option assuming CT is met, sodium hypochlorite would have to be NSF 60/61 certified, and to keep DWS Staff updated.

6/28/21: System has about 11,000 lbs of chlorine on hand with usage around 750 lbs per day estimating a supply of 14 days. However, they are expecting 26-300 gallon totes of 12.5% sodium hypochlorite tomorrow (6/29) and 3 tons of chlorine later in the week. System is continuing without prechlorination as a chlorine saving measure.

6/29/21: With supply on hand system is estimating a supply of 27-30 days.

7/6/21: Pre-chlorination will resume on 7/12/21.

8/13/21: On the evening of 8/12 system exhausted sodium hypochlorite supply and switched back to chlorine gas for prechlorination.

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