This question may not provide adequate information for an unequivocal
answer but I need to get something going.

Is it practical or common for a PCB Assembly House to achieve desirable
cleanliness levels (e.g. x micrograms equivalent NaCl per square inch
per IPC-A-610 default) without using deionized water in their aqueous
cleaning process.

If practical is it common?

Are there significant risks of leaving inorganic residue entrapped in
areas?

Thanks

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