Plating, Anodizing & Surface Treatment worked example

Wastewater Treatment Cost at 99% share of flow that is treatable: a worked example

This scenario runs the wastewater treatment cost calculation on the strong side: 99% share of flow that is treatable, with every other input held at its documented default. Use it when allocating the cost of neutralizing and discharging plating-line rinse water back onto the parts that generate it.

The inputs for this scenario

  • Rinse water sent to treatment: 4,000 gallons (unchanged)
  • Treatment cost per gallon: 0.06 $/gallon (unchanged)
  • Share of flow that is treatable: 99 % (raised for this scenario; the documented default is 90)
  • Sludge haul and permit cost adder: 140 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Treatment cost = gallons x cost per gallon x treatable share% + sludge and permit adder) to the inputs above produces each figure below.
  • At this operating point the engine returns 378 $ for total wastewater treatment cost, the number this scenario is built around.
  • At this operating point the engine returns 0.09 $ / piece for wastewater treatment cost per unit.
  • At this operating point the engine returns 238 $ for variable wastewater treatment cost.
  • At this operating point the engine returns 140 $ for fixed wastewater treatment cost adder.

How this compares with the baseline

  • Against the tool's baseline example, where share of flow that is treatable sits at 90% and the headline result is 356 $, this scenario comes in 6.07% above the baseline at 378 $.
  • Use it to allocate treatment overhead to a job, evaluate a water-reduction project, or budget monthly discharge costs against permit limits. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Total wastewater treatment cost: 378 $ (headline result)
  • Wastewater treatment cost per unit: 0.09 $ / piece
  • Variable wastewater treatment cost: 238 $
  • Fixed wastewater treatment cost adder: 140 $

Run it with your numbers

  • Every input above is editable in the live Wastewater Treatment Cost calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.