OHA Drinking Water Services
OR41
PWS ID: 00457 ---- LAKE OSWEGO MUNICIPAL WATER
System Information     Schedule Counts
Status:  Active
System Type:  Community
Population Served:  40,000		 Active:  3     Show Only Active
Inactive:  13  Show Inactive
Expired:  24
                     Show All

Routine Sampling Schedules For Chemicals
Facility
ID		 Name Status Test Group Samples
Required		    Sampling
Interval		 Start End    Notes
DIST-A DISTRIBUTION SYSTEMAASBESTOS, DIST1  9 Years01/01/2002OpenSchedule Reflects Monitoring Reduction Granted
DIST-A DISTRIBUTION SYSTEMALEAD & COPPER30  3 Years01/01/2015OpenSample Between June 1st and Sept 30th
DIST-A DISTRIBUTION SYSTEMASTAGE 2 DBP2  Quarterly07/01/2022OpenSample in Feb, May, Aug & Nov
Expired Schedules
CH-ACOMMON HEADER FOR WTP-AITOC & ALKALINITY1  Monthly07/01/201912/31/2019
CH-ACOMMON HEADER FOR WTP-AITOTAL ORGANIC CARBON1  Monthly01/01/200212/31/2007Raw Water TOC Only Required for Reduction in DBP Monitoring
CH-ACOMMON HEADER FOR WTP-AITOTAL ORGANIC CARBON1  Quarterly01/01/200812/31/2018Raw Water TOC Only Required for Reduction in DBP Monitoring
DIST-ADISTRIBUTION SYSTEMAHAA5 & TTHM2  Quarterly01/01/200212/31/2007Schedule Reflects Monitoring Reduction Granted
DIST-ADISTRIBUTION SYSTEMAHAA5 & TTHM1  Quarterly01/01/200803/31/2012Schedule Reflects Monitoring Reduction Granted
DIST-ADISTRIBUTION SYSTEMALEAD & COPPER30  3 Years01/01/200206/30/2013Sample Between June 1st and Sept 30th
DIST-ADISTRIBUTION SYSTEMALEAD & COPPER60  6 Months07/01/201306/30/2014
DIST-ADISTRIBUTION SYSTEMASTAGE 2 DBP4  Quarterly04/01/201206/30/2022Sample in Feb, May, Aug & Nov
EP-AEP FOR CLACKAMAS RIVERI2,4-D 1  Quarterly01/01/200812/31/2008If RAA is below MCL in Dec 2008, WS can reduce to an annual schedule
EP-AEP FOR CLACKAMAS RIVERI2,4-D 1  Quarterly07/01/201312/31/2013
EP-AEP FOR CLACKAMAS RIVERI2,4-D 1  Yearly01/01/200912/31/2011Sample after first autumnal rains.
EP-AEP FOR CLACKAMAS RIVERIARSENIC1  9 Years01/01/200812/31/2016
EP-AEP FOR CLACKAMAS RIVERIARSENIC1  Yearly01/01/200212/31/2007
EP-AEP FOR CLACKAMAS RIVERIBROMATE 1  Monthly12/01/201712/31/2019
EP-AEP FOR CLACKAMAS RIVERIIOC1  9 Years01/01/200212/31/2019Schedule Reflects Monitoring Reduction Granted
EP-AEP FOR CLACKAMAS RIVERINITRATE1  Yearly01/01/200212/31/2019
EP-AEP FOR CLACKAMAS RIVERINITRITE1  9 Years01/01/200212/31/2019Schedule Reflects Monitoring Reduction Granted
EP-AEP FOR CLACKAMAS RIVERIRAD - GROSS ALPHA1  9 Years01/01/200812/31/2016Schedule Reflects Monitoring Reduction Granted
EP-AEP FOR CLACKAMAS RIVERIRAD - RADIUM 226/2281  9 Years01/01/200812/31/2016Schedule Reflects Monitoring Reduction Granted
EP-AEP FOR CLACKAMAS RIVERIRAD - URANIUM1  9 Years01/01/200812/31/2016Schedule Reflects Monitoring Reduction Granted
EP-AEP FOR CLACKAMAS RIVERISOC2  3 Years01/01/200212/31/20132 Consec. QT Samples
EP-AEP FOR CLACKAMAS RIVERISOC2  3 Years01/01/201412/31/20192 Consec. QT Samples
EP-AEP FOR CLACKAMAS RIVERIVOLATILE ORGANICS1  Yearly01/01/200212/31/2019
SRC-AACLACKAMAS RIVERICYANOTOXINS1  2 Weeks07/15/201812/31/2019

More information for this water system: SDWIS ID 4106
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