There are problems with polyaluminum chloride
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Currently, water treatment plants use only three testing methods for polyaluminum chloride: basicity, insoluble matter content, and aluminum oxide content; there are no other testing methods available. The odor of PAC each time it is delivered varies (this is likely related to the acidic components in the raw materials). According to national standards, all three of these indicators are within acceptable limits, and the flocculation effect seems similar in all cases. It’s not clear whether such PAC has any impact on the treatment process; I would appreciate advice from those with more experience.
The parameters you have measured should be sufficient; it won’t have any impact on water treatment.