I would also recommend that you perform a raw water analysis to find out if the raw water is out of specification and compare it to the original water quality when the RO plant was design.
Published by Pierre Dreher, Water Treatment Plant Operator III at Olivenhain Municipal Water District
I would also recommend that you perform a raw water analysis to find out if the raw water is out of specification and compare it to the original water quality when the RO plant was design.