OHA Drinking Water Services
OR41
PWS ID: 00474 ---- LAWRENCE SUBDIVISION WTR ASSN

See also: Coliform Schedules

Chemical Sampling Schedule Status
Facility
ID
Analyte or Group   Sampling
Interval
Monitoring Period Days
Until
End
Samples
Required
Samples
Received
Last
Sample
Date
Start End
DIST-A  Distribution System ASBESTOS, DIST  9 Years 01/01/2026 - 12/31/2034 3,206 1 incomplete08/25/2025
DIST-A  Distribution System LEAD & COPPER notes3 Years01/01/2026 - 12/31/2026   5incomplete09/08/2023
  Seasonal sampling period:   06/01   thru   09/30
DIST-A  Distribution System STAGE 2 DBP notes3 Years01/01/2028 - 12/31/2028   1 07/22/2025
  Seasonal sampling period:   07/01   thru   07/31
EP-A  EP FOR WELLS #1 & #2 ARSENIC  3 Years 01/01/2026 - 12/31/2028 1,015 1 incomplete06/09/2025
EP-A  EP FOR WELLS #1 & #2 IOC notes9 Years 01/01/2020 - 12/31/2028 1,015 1 incomplete05/06/2019
EP-A  EP FOR WELLS #1 & #2 NITRATE  Yearly 01/01/2026 - 12/31/2026 284 1 incomplete06/09/2025
EP-A  EP FOR WELLS #1 & #2 NITRITE notes9 Years 01/01/2020 - 12/31/2028 1,015 1 incomplete05/06/2019
EP-A  EP FOR WELLS #1 & #2 PFAS notes6 Months 01/01/2026 - 06/30/2026 100 1 incomplete
  Initial monitoring - 2 samples only
EP-A  EP FOR WELLS #1 & #2 RAD - GROSS ALPHA notes9 Years 01/01/2026 - 12/31/2034 3,206 1 incomplete06/09/2025
EP-A  EP FOR WELLS #1 & #2 RAD - RADIUM 226/228notes9 Years 01/01/2026 - 12/31/2034 3,206 1 incomplete06/09/2025
EP-A  EP FOR WELLS #1 & #2 RAD - URANIUM notes9 Years 01/01/2026 - 12/31/2034 3,206 1 incomplete06/09/2025
EP-A  EP FOR WELLS #1 & #2 SOC  3 Years 01/01/2026 - 12/31/2028 1,015 1 incomplete06/09/2025
EP-A  EP FOR WELLS #1 & #2 VOLATILE ORGANICS  3 Years 01/01/2026 - 12/31/2028 1,015 1 incomplete06/09/2025

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Expired Schedules
Facility
ID
Analyte or Group    Sampling
Interval
Start End Samples
Required
   Notes
DIST-A  Distribution SystemHAA5 & TTHM  3 Years01/01/200512/31/20131Sample between June 1 and Sept. 30.
DIST-A  Distribution SystemHAA5 & TTHM  Yearly01/01/200412/31/20041Sample Between June 1st and Sept 30th Each Year
DIST-A  Distribution SystemLEAD & COPPER  6 Months01/01/200206/30/20025
DIST-A  Distribution SystemLEAD & COPPER  Yearly01/01/200312/31/20055Sample Between June 1st and Sept 30th

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