OHA Drinking Water Services
OR41
PWS ID: 95757 ---- COLUMBIA BASIN ONION
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 1 100000MN
Sep 30, 2025 1 300000MN
Jul 31, 2025 3 300000MN
Jun 30, 2025 3 310310MN
Include results older than 2022

More information for this water system: SDWIS ID 5721
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