Industrial Pretreatment

Industrial Pretreatment Program
The Industrial Pretreatment Program serves to protect the Village’s publicly owned treatment works (POTW), commonly referred to as the wastewater treatment plant, from upset and pass-through by reducing or eliminating discharges of harmful pollutants. This is accomplished through business registration, inspection, and wastewater sampling. Industrial dischargers are required to use treatment technologies and best management practices to reduce or eliminate the discharge of harmful pollutants to the sanitary sewer. Without these controls, many harmful pollutants could make their way through the treatment plant and into area streams, rivers, and lakes. View a copy of the Village’s pretreatment ordinance.

Registration Requirements
All new businesses in town, regardless of type, must register with the Environmental Quality Department before they begin operation. Registration forms can be picked up at the Building and Zoning Department located at 109 West Bangs Street, or you can download the New Business Registration Form (PDF) online. An inspection of the business (prior to opening) by the Environmental Quality Department may or may not be required, depending upon the nature of the operation. Similarly, a wastewater discharge permit may or may not be required.

This registration is required in accordance with the Village’s Industrial Pretreatment Program which is required by the Illinois Environmental Protection Agency. Industrial Pretreatment is a core part of the Federal Clean Water Act. The Village’s program is modeled after federal pretreatment regulations.

Wastewater Survey Requirements
All existing businesses in town, regardless of type, must complete an annual wastewater survey and return it to the Environmental Quality Department. This short survey collects information regarding the volume and characteristics of wastewater that each business discharges to the sanitary sewer system. The purpose of this survey is to ensure that the Village’s wastewater treatment facility remains protected from upset and pass-through. The wastewater survey will be mailed out to all businesses once per calendar year and will include a due date for submittal.

Wastewater Discharge Permits
The information obtained through business registration and initial inspection will determine whether or not the business is required to obtain a wastewater discharge permit. Businesses will be classified as either a commercial, industrial, or significant industrial user. Wastewater discharge permits are required for all businesses classified as significant industrial users. A significant industrial user (SIU) meets any or all of the following:

Industrial Users Subject to Federal Categorical Pretreatment Standards
Any other industrial user that:
  • Discharges an average of 25,000 gallons per day or more of process wastewater
  • Contributes a process wastestream which makes up 5% or more of the average dry weather hydraulic or organic capacity of the treatment plant
  • Is designated as significant by the Village on a basis that the industrial user has a reasonable potential for adversely affecting the POTW’s operation or for violating any pretreatment standard or requirement. Download a wastewater discharge permit application (PDF). Please contact the Environmental Quality Department at 847-526-9610 for more information.
Inspection & Sampling
All significant industrial users (SIUs) will be inspected and sampled by the Village at least annually. Additional inspection and sampling may be done at the discretion of the Village. Wastewater discharge permits may also require that the SIU perform its own sampling.

In addition, non-permitted industrial users may also be inspected and sampled at the Village’s discretion for the purposes of protecting the POTW from harmful discharges and ensuring that the business is in compliance with pretreatment regulations. Inspections and sampling may be announced or unannounced. The business is required to provide ready access to all parts of the premises to the Village for the purposes of inspection, sampling, records examination and copying, and the performance of additional duties to ensure that pretreatment regulations are being met.