Industrial Wastewater Surcharge Calculator

Compute POTW surcharges for high-strength wastewater.

Facility & Flow Inputs

Parameter Data

Surcharge Results

$0.00
Parameter Excess (lb/day) Surcharge

About the Industrial Wastewater Surcharge Calculator

Industrial plant operators can accurately estimate municipal treatment costs using this wastewater surcharge calculator. By converting pollutant concentrations like BOD, TSS, and FOG into daily mass loadings, you determine the exact excess pounds discharged to the local POTW. Understanding these heavy financial metrics allows you to evaluate the precise ROI of installing on-site pretreatment systems to control effluent fees.

How it works

  1. Input your facility's daily wastewater flow rate in Millions of Gallons per Day (MGD).
  2. Enter your effluent concentration levels in milligrams per liter (mg/L) for parameters like BOD, TSS, and FOG.
  3. Enter the municipality's baseline concentration allowances (the limit before surcharges apply) for each parameter.
  4. Input the POTW surcharge rate per pound of excess pollutant to calculate your estimated daily and monthly financial exposure.

Frequently asked questions

How is concentration (mg/L) converted to mass (lbs/day)?

The standard environmental engineering formula is: Flow (MGD) × Concentration (mg/L) × 8.34 lbs/gal = Mass Loading (lbs/day).

What is a POTW baseline allowance?

Municipalities typically allow a standard concentration of pollutants (often equivalent to domestic sewage, such as 250 mg/L for BOD and TSS) to be discharged without extra fees. Surcharges apply solely to the excess mass above this baseline.

Why do municipalities charge for excess BOD and TSS?

High Biochemical Oxygen Demand (BOD) and Total Suspended Solids (TSS) require significantly more energy, aeration, and chemical treatment at the municipal plant. Surcharges directly recover these increased operational costs.

How can I reduce these wastewater surcharges?

Facilities can substantially lower surcharges by reducing overall water usage, implementing source control to prevent solids from entering drains, or installing on-site pretreatment systems like Dissolved Air Flotation (DAF) units.

References