OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 00055
PWS Name: ASTORIA, CITY OF
 
Who Was Contacted and Phone: Gary McLauchlin (503) 325-3524
Contact Date: 08/30/2012
Contacted By: HOFELD, EVAN (REGION 1)
Contact Method/Location: Office
 
Assistance Type: WATER QUALITY ALERT RESPONSE
Reasons: Disinfection Byproducts
DBPs
 
Details: SUMMARY: 5 individual HAA5 result over the 0.060 mg/l alert level DETAILS: I received an alert for 5 of 5 DBP samples taken July 11, 2012 due to the HAA5 level being over the 0.060 mg/l alert level for each of the sample sites (DBPMAX02, DBP01, DBP02, and two DBP stage 2 sites). The system-wide running annual average was still below the 0.060 mg/l MCL at 0.048 mg/l. The system is investigating residual disinfection control changes into and out of Reservoir 2 in order to lower these levels. I explained that they may have trouble when the MCL is calculated using the Locational Running Annual Average (LRAA) under DBP Stage 2 beginning in 2013, since the LRAA for one of the stage 2 sites was 0.061 mg/l, with the other sites ranging from 0.018 - 0.057 mg/l. ACTION NEEDED: System to report detections in the annual CCR for CY2012 and investigate ways to optimize residual disinfection.
 
Associated Alerts: CHEM5487 - 08/27/2012 - TOTAL HALOACETIC ACIDS (HAA5)

CHEM5487 - 08/27/2012 - TOTAL HALOACETIC ACIDS (HAA5)

CHEM5487 - 08/27/2012 - TOTAL HALOACETIC ACIDS (HAA5)

CHEM5487 - 08/27/2012 - TOTAL HALOACETIC ACIDS (HAA5)

CHEM5487 - 08/27/2012 - TOTAL HALOACETIC ACIDS (HAA5)



More information for this water system: SDWIS ID 3873
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