OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 00854
PWS Name: SWISSHOME VILLAGE
 
Who Was Contacted: Matt Grassauer
Contact Phone: 541-972-1859 (Email address hidden)
Contact Date: 06/16/2020
Contacted By: MACPHERSON, JAMES (DWP)
Contact Method/Location: Phone
 
Assistance Type: WATER QUALITY ALERT RESPONSE
Reasons: Disinfection Byproducts
 
Details: Matt operated the clearwell at lower levels than historically most of the time in 2020. The tank was not cleaned a second time. Lower levels did not succeed in consistently keeping TTHM below the MCL as noted by the most recent result. Thus, a combination of approaches may be necessary: reduce total organic carbon load by putting slow sand filter online, keep clearwell volume low, consider another cleaning of the clearwell, and consider adding a downstream storage tank before which chlorination is moved that provides sufficient CT yet does not chlorinate the large volume in the current clearwell.
 
Associated Alerts: CHEM8965 - 06/15/2020 - TOTAL TRIHALOMETHANES (TTHM)



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