Changes in raw-water appearance must be assessed using tests and equipment operating limits. Treatment used on another project cannot simply be copied.
Documents to prepare
Record when changes occur, the water source, testing locations, raw-water and pretreatment data, and operating observations. Check equipment instructions and management requirements; responsible staff should assess whether further inspection or adjustment is needed. Dosing and backwashing must follow the specific plan. Purchasing information is not a site operating procedure.
Using records for the next step
Keep separate dates for raw-water information, equipment information, sampling, and records. Distinguish observations from conclusions about their causes, and mark missing information for review. Retain the confirmation basis and document versions when changing configurations or maintenance arrangements.
Related detailed guides
[Water treatment operation and maintenance records for hotels, catering, and schools](/en/articles/commercial-water-operation-records)
Prepared with AI assistance; updated on October 1, 2026. This article does not replace site operating instructions or the relevant product and testing documents.