OHA Drinking Water Services
OR41
PWS ID: 00493 ---- LYONS MEHAMA WATER DISTRICT

See also: Coliform Schedules  ::  LT2 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
CH-A  COMMON HEADER FOR WTP-ATOTAL ORGANIC CARBONnotesQuarterly01/01/2025 - 03/31/2025 6 1 done 02/04/2025
DIST-A  Distribution System ASBESTOS, DIST notes9 Years01/01/2017 - 12/31/2025 281 1 done 08/17/2023
DIST-A  Distribution System LEAD & COPPER notes3 Years01/01/2025 - 12/31/2025   10incomplete09/15/2021
 Seasonal sampling period:  06/01  thru  09/30
DIST-A  Distribution System STAGE 2 DBP notesYearly 01/01/2025 - 12/31/2025 281 1 incomplete07/15/2024
 Seasonal sampling period:  07/01  thru  07/31
EP-A  EP for NORTH SANTIAM RIVER ARSENIC  9 Years 01/01/2020 - 12/31/2028 1,377 1 incomplete11/19/2019
EP-A  EP for NORTH SANTIAM RIVER IOC notes9 Years 01/01/2020 - 12/31/2028 1,377 1 incomplete11/19/2019
EP-A  EP for NORTH SANTIAM RIVER NITRATE  Yearly 01/01/2025 - 12/31/2025 281 1 incomplete06/16/2024
EP-A  EP for NORTH SANTIAM RIVER NITRITE notes9 Years 01/01/2020 - 12/31/2028 1,377 1 incomplete11/19/2019
EP-A  EP for NORTH SANTIAM RIVER RAD - GROSS ALPHA  9 Years 01/01/2020 - 12/31/2028 1,377 1 incomplete11/19/2019
EP-A  EP for NORTH SANTIAM RIVER RAD - RADIUM 226/228 9 Years 01/01/2020 - 12/31/2028 1,377 1 incomplete11/19/2019
EP-A  EP for NORTH SANTIAM RIVER RAD - URANIUM  9 Years 01/01/2020 - 12/31/2028 1,377 1 incomplete11/19/2019
EP-A  EP for NORTH SANTIAM RIVER SOC  3 Years01/01/2023 - 12/31/2025 281 1 done 02/11/2025
EP-A  EP for NORTH SANTIAM RIVER VOLATILE ORGANICS  Yearly 01/01/2025 - 12/31/2025 281 1 incomplete06/17/2024
SRC-AA  NORTH SANTIAM RIVER CYANOTOXINS  2 Weeks-- -- -- -- --10/21/2024
 Seasonal sampling period:  05/01  thru  10/31

15  secs
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Expired Schedules
Facility
ID		 Analyte or Group    Sampling
Interval		 Start End Samples
Required		    Notes
CH-A  COMMON HEADER FOR WTP-ATOTAL ORGANIC CARBON  Monthly01/01/200412/31/20071Raw Water TOC Only Required for Reduction in DBP Monitoring
DIST-A  Distribution SystemHAA5 & TTHM  Quarterly01/01/200412/31/20061Schedule Reflects 1 RT Sample Per QT Per WTP. Monitoring reduction granted effective 01/01/2007 - BG
DIST-A  Distribution SystemHAA5 & TTHM  Yearly01/01/200709/30/20131Sample between June 1 and Sept. 30.
DIST-A  Distribution SystemLEAD & COPPER  6 Months01/01/200212/31/200220
DIST-A  Distribution SystemSTAGE 2 DBP  Quarterly10/01/201312/31/20151Sample During Peak Historical Month and Every 90 days Before/After
EP-A  EP for NORTH SANTIAM RIVERARSENIC  Yearly01/01/200212/31/20131
EP-A  EP for NORTH SANTIAM RIVERCYANOTOXINS  WK 06/30/201907/13/20191
EP-A  EP for NORTH SANTIAM RIVERCYANOTOXINS  WK 07/14/202408/30/20241
EP-A  EP for NORTH SANTIAM RIVERRAD - RADIUM 226/228  6 Years01/01/201412/31/20191
EP-A  EP for NORTH SANTIAM RIVERRAD - RADIUM 226/228  9 Years01/01/200812/31/20131
EP-A  EP for NORTH SANTIAM RIVERVOLATILE ORGANICS  3 Years01/01/201412/31/20161
EP-A  EP for NORTH SANTIAM RIVERVOLATILE ORGANICS  Yearly01/01/200212/31/20121
SRC-AA  NORTH SANTIAM RIVERCYANOTOXINS  2 Weeks07/14/201907/09/20241
SRC-AA  NORTH SANTIAM RIVERCYANOTOXINS  2 Weeks07/15/201806/28/20191
SRC-AA  NORTH SANTIAM RIVERCYANOTOXINS  WK 06/30/201907/13/20191
SRC-AA  NORTH SANTIAM RIVERCYANOTOXINS  WK 07/14/202409/06/20241

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