Wastewater Surcharge

Balancing the Accounts. Calculator, penThe LACSD Wastewater Treatment Surcharge program is an annual fee for industrial wastewater users who discharge more than 1 million gallons (MMgal) of wastewater during the fiscal year (July 1 through June 30), or for some facilities whose discharge is extremely concentrated with pollutants. Facilities that discharge more than 6 MMgal must file the Long Form Surcharge Statement, which computes the annual fee from multiple factors including discharge volume, chemical oxygen demand (COD), suspended solids (SS), and peak flow. Facilities who discharge more than 1 MMgal, but less than 6 MMgal of wastewater may file a Short Form Surcharge Statement, which calculates the annual fee based on only discharge volume.  The Short form fee calculation accounts for the other parameters assuming typical values, and therefore the discharge volume price is significantly higher than that for the Long form where these costs are separated. Examples of fees for the fiscal years 2015-16 and 2016-17 for Sanitation District 5 (Inglewood, Torrance, and Palos Verdes area) are shown below.

  • Parameter
  • $$ / MMgal (Short Form)
  • $$ / MMgal (Long Form)
  • $$ / Mlbs COD
  • $$ / Mlbs SS
  • $$ / gpm Peak Flow
  • FY2015-16
  • $3,479.00
  • $819.00
  • $144.90
  • $409.90
  • $108.70
  • FY2016-17
  • $3,577.00
  • $843.00
  • $149.00
  • $421.50
  • $111.70

Facilities completing the Long Form method of calculating their annual Surcharge fee are required to obtain a minimum number of samples throughout the fiscal year, ranging from one sample every three months to two samples per week, for both COD and SS pollutant.  Concentrations obtained from the sample analysis (typically in mg/l) are then applied to the total flow for the period in which they were obtained and then converted to Mlbs.  Long Form dischargers must also report their annual peak flow, typically an average of the facility’s highest valid peak flows discharged during the hours of 8a.m. to 10p.m. The reported annual peak flow is then factored into a complex equation to determine the total peak flow fee.  The total annual Surcharge fee is computed by summing the flow, COD, SS and peak flow fees then adding in a small sanitary flow charge for the wastewater generated by employees (i.e., toilets, sinks, etc.) to obtain the gross wastewater treatment surcharge payable amount.

To learn more about how Davenport Engineering can assist your facility with determining wastewater surcharge fees, please contact us today.