OHA Drinking Water Services
OR41
PWS ID: 00724 ---- ST HELENS, 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-A COMMON HEADER FOR WTP-A ORCS CYLINDROSPERMOPSIN 2W 3/8/2026 - 3/21/2026 3 1 0 10/27/2025 05/01 thru 10/31
CH-A COMMON HEADER FOR WTP-A ORTM TOTAL MICROCYSTINS 2W 3/8/2026 - 3/21/2026 3 1 0 10/27/2025 05/01 thru 10/31