I’m concerned that the water softener regeneration process discharges salt to drain. Surely this is environmentally unfriendly as well as wasting water?
The regenerant from a water softener is basically chlorides. The amounts are a trivial contribution to overall sewage discharge from a home. It must be remembered that softened water enables detergent usage to be cut substantially and this reduces phosphate and other chemical discharges by up to two thirds. This vastly outweighs any concerns about the water softener regeneration process. Most water softeners use less than 5% of the softened water for regeneration. This must be compared with lower cleaning frequencies and consequently lower water usage. Taking this into consideration, The Building Research Establishment, in their recently published, ‘Code for Sustainable Homes’, discounted water usage, by a softener installation, as it is normally less than the percentage shown above.
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