OHA Drinking Water Services
OR41
PWS ID: 01513 ---- HILLSBORO, CITY OF
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
Oct 31, 2025 90 7400000MN
Sep 30, 2025 90 9800000MN
Aug 31, 2025 90 10100000MN
Jul 31, 2025 90 9810300MN
Jun 30, 2025 90 10000000MN
May 31, 2025 90 10000000MN
Apr 30, 2025 90 10000000MN
Mar 31, 2025 90 9700000MN
Feb 28, 2025 90 10000000MN
Jan 31, 2025 90 9900000MN
Dec 31, 2024 90 9900000MN
Nov 30, 2024 90 9900000MN
Oct 31, 2024 90 10000000MN
Sep 30, 2024 90 10000000MN
Aug 31, 2024 90 10000000MN
Jul 31, 2024 90 10000000MN
Jun 30, 2024 90 10000000MN
May 31, 2024 90 10000000MN
Apr 30, 2024 90 10000000MN
Mar 31, 2024 90 10000000MN
Feb 29, 2024 90 9900000MN
Jan 31, 2024 90 9700000MN
Dec 31, 2023 90 9800000MN
Nov 30, 2023 90 9910300MN
Oct 31, 2023 90 10000000MN
Sep 30, 2023 90 9900000MN
Aug 31, 2023 90 10010300MN
Jul 31, 2023 90 9900000MN
Jun 30, 2023 90 10000000MN
May 31, 2023 90 10000000MN
Apr 30, 2023 90 10000000MN
Mar 31, 2023 90 10000000MN
Feb 28, 2023 90 10000000MN
Jan 31, 2023 90 9900000MN
Dec 31, 2022 90 9900000MN
Nov 30, 2022 90 10000000MN
Oct 31, 2022 90 10010300MN
Sep 30, 2022 90 9900000MN
Aug 31, 2022 90 10000000MN
Jul 31, 2022 90 10000000MN
Jun 30, 2022 90 10000000MN
May 31, 2022 90 10000000MN
Apr 30, 2022 90 10000000MN
Mar 31, 2022 90 10000000MN
Feb 28, 2022 90 10000000MN
Jan 31, 2022 90 10010300MN
Include results older than 2022

More information for this water system: SDWIS ID 5024
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