AWP Labs · Planning
Water reuse savings
Estimate gallons recovered, purchase and sewer costs avoided, net annual savings and simple payback for an on-site reuse system.
Your inputs
The rest leaves as concentrate or sludge.
Results
Net savings per year
$297,500
Simple payback in 2.9 years
- Water reused
- 26.3M gal/yr
- 80.6 acre-feet
- Water purchases avoided
- $170,625
- Sewer charges avoided
- $196,875
- Operating cost
- $70,000
- per year
- 10-year net value
- $2.13M
- before financing and escalation
- Cost of reused water
- $2.67/kgal
- vs $14.00 today
Cumulative cash position
A payback under three years is a strong case. An AWP engineer can firm up the installed cost for your water.
How this is calculated
Volume. Reused = Flow × Operating days × Recovery.
Savings. Net = Reused × (Water rate + Sewer rate) − Treated × Operating cost, all per 1,000 gallons.
Payback. Years = Installed cost ÷ Net annual savings.
Assumptions
- Every reused gallon replaces one purchased gallon and avoids one gallon of sewer discharge.
- Rates are held constant. Rising water and sewer rates shorten the payback.
- Financing, incentives and concentrate disposal costs are not included.
A preliminary estimate for planning. AWP confirms every figure against your water, site and permit before quoting.
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