Another major problem is ...
Published by Randall E Witte, Lighthouse Utility Solutions, Inc., Zintro - Chairman and CEO, Expert
Another major problem is that several of the "receiving" systems are not designed to work well with soft water so not enough effort to properly treating the incoming flow. This causes really tough scaling that is hard to dislodge during back-flow flushing.
Best solution is to "re-treat" cleaned effluent as needed to support the down-stream process.