OHA Drinking Water Services
OR41
PWS ID: 00657 ---- PORTLAND WATER BUREAU
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 2022
Period End Date Routines Required Routines Reported Routine TC+ Routine EC+ Repeats Reported Repeat TC+ Repeat EC+ Period Type
Dec 31, 2025 240 000000MN
Nov 30, 2025 240 110300MN
Oct 31, 2025 240 26100000MN
Sep 30, 2025 240 25900000MN
Aug 31, 2025 240 25910300MN
Jul 31, 2025 240 25000000MN
Jun 30, 2025 240 25100000MN
May 31, 2025 240 25900000MN
Apr 30, 2025 240 25400000MN
Mar 31, 2025 240 25100000MN
Feb 28, 2025 240 25900000MN
Jan 31, 2025 240 25300000MN
Dec 31, 2024 240 25400000MN
Nov 30, 2024 240 26000000MN
Oct 31, 2024 240 25200000MN
Sep 30, 2024 240 26010300MN
Aug 31, 2024 240 26200000MN
Jul 31, 2024 240 25300000MN
Jun 30, 2024 240 25610300MN
May 31, 2024 240 25810300MN
Apr 30, 2024 240 25300000MN
Mar 31, 2024 240 25600000MN
Feb 29, 2024 240 25100000MN
Jan 31, 2024 240 25200000MN
Dec 31, 2023 240 26500000MN
Nov 30, 2023 240 25700000MN
Oct 31, 2023 240 25300000MN
Sep 30, 2023 240 26130900MN
Aug 31, 2023 240 25400000MN
Jul 31, 2023 240 25810300MN
Jun 30, 2023 240 25610300MN
May 31, 2023 240 25300000MN
Apr 30, 2023 240 25900000MN
Mar 31, 2023 240 25300000MN
Feb 28, 2023 240 24200000MN
Jan 31, 2023 240 25700000MN
Dec 31, 2022 240 27100000MN
Nov 30, 2022 240 27000000MN
Oct 31, 2022 240 26110300MN
Sep 30, 2022 240 26010300MN
Aug 31, 2022 240 25300000MN
Jul 31, 2022 240 23810300MN
Jun 30, 2022 240 25200000MN
May 31, 2022 240 25200000MN
Apr 30, 2022 240 25700000MN
Mar 31, 2022 240 25100000MN
Feb 28, 2022 240 25200000MN
Jan 31, 2022 240 25300000MN
Include results older than 2022

More information for this water system: SDWIS ID 3900
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