Industrial Pretreatment


The City's Industrial Pretreatment Program (IPP) was approved by the U.S. Environmental Protection Agency and the Missouri Department of Natural Resources in 1985. The IPP enables the City to be in compliance with pretreatment standards and regulations mandated by these agencies. The goal of the City's IPP is to maintain and improve the water quality of the rivers, lakes, and streams in Springfield and the surrounding area by limiting the discharge of toxic and potentially harmful substances into the wastewater collection and treatment system. These substances can interfere with the wastewater treatment process, pass through the treatment plant into the receiving stream, or contaminate the biosolids generated at the plant. Biosolids which exceed regulated levels for pollutants cannot be beneficially reused, thus increasing disposal costs.

The IPP also works with local industries to encourage water conservation and identify opportunities to recycle, reuse, and reclaim industrial process wastewater.

In 2008, pollutants discharged to the City of Springfield Wastewater collection system from industrial and commercial facilities were monitored by approximately 2,280 laboratory samples with over 11,000 individual lab analysis results.

Read the Industrial Pretreatment Program 2013 Annual Report

Four Aspects of the Industrial Pretreatment Program

  1. Identification of commercial and industrial customers within the area served by the City POTW. Customers are categorized as Significant or Non-Significant industrial users. Customers in both categories are monitored by the IPP. Significant customers must also possess a permit and follow specific self-monitoring and record keeping requirements.
  2. Determination of wastewater characteristics from commercial and industrial customers. Some customers may be required to pretreat their wastewater onsite and at their own cost before discharge to the City wastewater collection system.
  3. A monitoring, permitting, and inspection system to work with customers to assure compliance with Local, State and Federal wastewater law and discharge standards.
  4. Calculation of customer user charges to fairly and equitably recover costs to the the City of monitoring and treating commercial and industrial wastewater.

National Categorical Standards and Effluent Guidelines

commercial industrial customers are categorized as significant users

Industries in these categories must be permitted by the IPP

Existing Categories - Electroplating, Printed Circuit board Manufacturers, Metal Finishing Operations, Timber Products, Pharmaceutical Manufacturing, Steam Electric Power Generation, Paint Formulating, Metal Molding and Casting(Foundries), Transportation Equipment Cleaning, Landfills, Centralized Waste Treatment, Oil and Gas Extraction, Pesticide Formulating, Packaging, and Repackaging, Leather Tanning and Finishing, Coal Mining, Organic Chemical, Plastics, and Synthetic Fibers, and many other categories not listed or currently located in Springfield.

Proposed Categories or Under Study - Aquatic Animal Production, Metal Products and Machinery(I & II), Ore Mining and Dressing, Drum Reconditioning, Hospitals, Meat and Poultry Products, Industrial Waste Combustors, Pulp, Paper, and Paperboard, Concentrated Animal Feeding Operations, Construction and Development, Airport Deicing, and others to be chosen later.

Pretreatment Regulations

General and Specific Prohibited Discharges

  • Pollutants causing pass through or interference
  • Flashpoint <140 degrees Fahrenheit
  • pH < 5.0 and > 12.5 standard units
  • Solid or viscous causing obstructions
  • Flow/Concentration causing interference i.e. Slug Discharges
  • Heat >150 degrees Fahrenheit or causing plant influent to exceed 104 degrees Fahrenheit , inhibiting biological activity at the plant
  • Oil and grease causing pass through or interference
  • Toxic gases, vapors, fumes within POTW; acute worker health and safety
  • Trucked or hauled pollutants, except acceptable and approved wastewater, only at points designated by the POTW

Chapter 120 of the City Code lists all wastewater regulations - Chapter 120

Local Discharge Limitations

  • Review of local limits is ongoing based on the occurrence of treatment problems and pollutant issues. A formal reassessment is required every 5 years.
  • Specific Pollutant Limitations
  • Local National Pollutant Discharge Elimination System (NPDES) Permit, Site Specific
  • Discharge permit limitations
  • Sludge management and disposal requirements
  • State Water Quality Standards
  • Air quality emissions, odors, etc.
  • Pass through and interference with plant processes

Missouri Water Environment Association Pretreatment Awards