OHA Drinking Water Services
OR41
PWS ID: 00665 ---- TUALATIN VALLEY WATER DISTRICT
Coliform Summary History

Note: Samples for a given monitoring period are due 10 days after period end date. Therefore the most recent monitoring periods may show zero samples reported. This does not mean the water system is out of compliance.

Number of Samples Reported
Abbreviations: TC+: Total Coliform Positive, EC+: E. Coli Positive
Include results older than 2021
Period End Date Routines Required Routines Reported Routine TC+ Routine EC+ Repeats Reported Repeat TC+ Repeat EC+ Period Type
Dec 31, 2024 150 4900000MN
Nov 30, 2024 150 15100000MN
Oct 31, 2024 150 15200000MN
Sep 30, 2024 150 15100000MN
Aug 31, 2024 150 15300000MN
Jul 31, 2024 150 15100000MN
Jun 30, 2024 150 15110300MN
May 31, 2024 150 15100000MN
Apr 30, 2024 150 15100000MN
Mar 31, 2024 150 15200000MN
Feb 29, 2024 150 15110300MN
Jan 31, 2024 150 15100000MN
Dec 31, 2023 150 15100000MN
Nov 30, 2023 150 15200000MN
Oct 31, 2023 150 15900000MN
Sep 30, 2023 150 15100000MN
Aug 31, 2023 150 15300000MN
Jul 31, 2023 150 15010300MN
Jun 30, 2023 150 15300000MN
May 31, 2023 150 15100000MN
Apr 30, 2023 150 15000000MN
Mar 31, 2023 150 15000000MN
Feb 28, 2023 150 15000000MN
Jan 31, 2023 150 15800000MN
Dec 31, 2022 150 15200000MN
Nov 30, 2022 150 15000000MN
Oct 31, 2022 150 15300000MN
Sep 30, 2022 150 15200000MN
Aug 31, 2022 150 15200000MN
Jul 31, 2022 150 15800000MN
Jun 30, 2022 150 15200000MN
May 31, 2022 150 15300000MN
Apr 30, 2022 150 15000000MN
Mar 31, 2022 150 15100000MN
Feb 28, 2022 150 15300000MN
Jan 31, 2022 150 15000000MN
Dec 31, 2021 150 15200000MN
Nov 30, 2021 150 15400000MN
Oct 31, 2021 150 15300000MN
Sep 30, 2021 150 15100000MN
Aug 31, 2021 150 15200000MN
Jul 31, 2021 150 15100000MN
Jun 30, 2021 150 15200000MN
May 31, 2021 150 15200000MN
Apr 30, 2021 150 15100000MN
Mar 31, 2021 150 15200000MN
Feb 28, 2021 150 15200000MN
Jan 31, 2021 150 15200000MN
Include results older than 2021


More information for this water system: SDWIS ID 4065
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