Payback is not just water price. A lifecycle model for reuse that includes risk, permits and the value of supply security.
Beyond the water bill
Most reuse business cases compare the cost of treated water with the price of mains water and stop there. That misses discharge charges, abstraction licence risk, and the cost of a production stop when supply is restricted.
Building the model
We model reuse over a 20-year horizon. It includes capex, energy, chemicals, membrane replacement and labour, against avoided supply and discharge costs. Water prices and drought frequency are stress-tested. On most sites the result is a range, not a single payback figure, and that range is what decision-makers need.
Where reuse wins first
The strongest cases are high-volume, consistent streams with a clear next use: cooling tower make-up, boiler feed and wash water. Start there, prove the economics, then extend.
Keep reading
Reverse osmosis
14 Oct 2026
7 min
Reading the early signs of membrane fouling
Normalised permeate flow tells you more than any alarm. How to spot fouling weeks before it costs you a cleaning cycle.
Water reuse
30 Sep 2026
9 min
The real economics of industrial water reuse
Payback is not just water price. A lifecycle model for reuse that includes risk, permits and the value of supply security.
Engineering
12 Sep 2026
5 min
Why we still build physical models
In a world of digital twins, a white model on a table still catches the clashes and access problems nobody saw on screen.