OHA Drinking Water Services
OR41
PWS ID: 00587 ---- ONTARIO, CITY OF
Single Chemical Schedule

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Facility
ID
Facility Name Analyte
Code
Analyte Sampling
Interval
Monitoring
Period
Start
Monitoring
Period
Due Date
Days
Until
Due
Samples
Required
Samples
Received
Last
Sample
Date
Seasonal Sampling
Period
CH-A1 CH FOR OLD PLANT 1927 ALKALINITY, TOTAL notes Quarterly1/1/2026 - 3/31/2026 13 1 0 10/13/2025
CH-A1 CH FOR OLD PLANT 2920 TOTAL ORGANIC CARBON notes Quarterly1/1/2026 - 3/31/2026 13 1 0 10/13/2025