OHA Drinking Water Services
OR41
PWS ID: 00665 ---- TUALATIN VALLEY WATER DISTRICT
System Information     Schedule Counts
Status:  Active
System Type:  Community
Population Served:  224,600
 Active:  12
Inactive:  0
Expired:  16  Show Expired

Routine Sampling Schedules For Chemicals
Facility
ID
Name Status Test Group Samples
Required
   Sampling
Interval
Start End    Notes
DIST-A DISTRIBUTION SYSTEMALEAD & COPPER50  Yearly01/01/2024OpenCollect samples between June 1st and Sept 30th
DIST-A DISTRIBUTION SYSTEMASTAGE 2 DBP8  Quarterly04/01/2014OpenSample in June, Sept, Dec, & March
EP-C EP FOR WELL 1 - GRABHORN ASRAARSENIC1  9 Years01/01/2017OpenSchedule Reflects Monitoring Reduction Granted
EP-C EP FOR WELL 1 - GRABHORN ASRAIOC1  9 Years01/01/2017OpenSchedule Reflects Monitoring Reduction Granted
EP-C EP FOR WELL 1 - GRABHORN ASRANITRATE1  Yearly01/01/2009Open
EP-C EP FOR WELL 1 - GRABHORN ASRANITRITE1  9 Years01/01/2017OpenSchedule Reflects Monitoring Reduction Granted
EP-C EP FOR WELL 1 - GRABHORN ASRAPFAS1  Quarterly01/01/2023OpenInitial monitoring - 4 quarters only
EP-C EP FOR WELL 1 - GRABHORN ASRARAD - GROSS ALPHA1  9 Years01/01/2011OpenSchedule Reflects Monitoring Reduction Granted
EP-C EP FOR WELL 1 - GRABHORN ASRARAD - RADIUM 226/2281  9 Years01/01/2014OpenSchedule Reflects Monitoring Reduction Granted
EP-C EP FOR WELL 1 - GRABHORN ASRARAD - URANIUM1  9 Years01/01/2014OpenSchedule Reflects Monitoring Reduction Granted
EP-C EP FOR WELL 1 - GRABHORN ASRASOC2  3 Years01/01/2014Open2 Consec. QT Samples
EP-C EP FOR WELL 1 - GRABHORN ASRAVOLATILE ORGANICS1  3 Years01/01/2014Open