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Industrial Pretreatment

The industrial pretreatment program protects the city’s wastewater collection and treatment systems and the environment by preventing toxic and dangerous substances from discharging into the sanitary sewer system.

We work with businesses to ensure the sewer system remains free from toxic and dangerous substances, by:

  • Issuing Discharge Permits
  • Performing Site Inspections
  • Monitoring Discharges
  • Enforcing Pretreatment Standards and Requirements
Business Owner Responsibilities
Wastewater Questionnaires
As a business owner within the city, you are required to fill out the Industrial Wastewater Questionnaire at the time of business startup.  This is the simplest way for the city to initially assess the nature of your wastewater. An additional questionnaire or inspection may be required based on the information provided.

Food Service Establishments
All non-domestic facilities that prepare, serve, or otherwise make any type of food or beverages available for consumption (Food Service Establishment) are required to install and maintain a gravity grease interceptor. Interceptors prevent food-related fats, oils and grease (FOG) from entering the city’s sewers. See the documents below for more information.

Pretreatment Inspections
Some business practices are expected to be subject to the pretreatment program (metal finishers, dairies, chemical facilities, etc.).  In these cases, inspection of your premises will be forthcoming.  A wastewater questionnaire may trigger an on-site inspection.  The purpose of the inspection is to assess the quality, strength and quantity of wastewater that your business generates.

Pretreatment Permits
If conditions warrant, the city may issue your business a discharge permit.  This permit will serve as a framework under which your business may discharge wastewater to the city's Wastewater Treatment Plant.

Certain “one time” disposal practices may require temporary permits.  Please contact us if you would like to conduct a non-routine disposal procedure that you think may cause problems to the city's publicly-owned treatment works or may not be allowed under local code or national pretreatment standards.

Alexandra Tullos
Industrial Pretreatment Specialist

12301 Claude Court
Northglenn, CO 80241