OHA Drinking Water Services
OHA Drinking Water Services
Contact Report Details

PWS ID: OR41 05592
Who Was Contacted and Phone: Jim Pinson (541) 269-0321
Contact Date: 09/27/2017
Contacted By: PARRY, BETSY (REGION 2)
Contact Method/Location: Office
Reasons: Disinfection Byproducts
Details: SUMMARY: DBP compliance status DETAILS: HAA5 exceeded again in August, but no new violation as the RAA did not exceed. They could still meet the terms of their corrective action plan if the 4th quarter 2017 and 1st quarter 2018 samples are below the MCL. (As recounted in the 2/21/17 contact report, this alone would not be enough to reduce the monitoring schedule.) The system has not been executing one portion of their own corrective action plan, that of reducing the chlorine from 0.5 and higher to about half that. With the UV now, they only need to maintain a residual of 0.2 mg/L at the entry point. Jim will try to reduce this level going forward, but it is very difficult to do during the 3rd quarter when higher organics in the creek mean higher chlorine demand. If they dont keep adding more, it goes to zero. And its this chlorine consumption that causes the higher DBPs. It is clear that they will need to do something more or they will exceed again in future 3rd quarters. Jim is looking into reducing the water level in the tank at that time of year, by lowering the float or adding a second float lower. I suggested he continue to consider other measures as well. ACTION NEEDED: Await results of next quarterly DBP samples.
Associated Alerts: CHEM7674 - 08/29/2017 - TOTAL HALOACETIC ACIDS (HAA5)

For further information on this public water system, click on the area of interest below:
System Info :: Report for Lenders :: Alerts :: Violations :: Compliance & Enforcement :: Contacts & Advisories :: Site Visits :: Public Notice
Coliform Summary :: Coliform Results :: Sampling Schedule for Coliform :: Groundwater/GWUDI Source Details :: Plan Review :: Annual Fee
Chemical Group Summary :: Latest Chemical Results :: Entry Point Detects :: Single Analyte Results 
Chemical Schedule Summary :: Chemical Schedule Details
Lead & Copper :: Corrosion Control (LCR) :: Nitrate :: Arsenic :: Radionuclides :: GWR 4-Log :: LT2 :: Cyanotoxins :: PFAS
DBPs :: TOC & Alkalinity :: DBP Sample Sites :: FANLs :: MRDL :: Turbidity :: SWTR :: RAA :: LRAA For SDWIS: 3924