Green News


Click here

to see how the WRF is
committed to energy conservation


Des Moines Metropolitan
Wastewater Reclamation Authority
3000 Vandalia Road
Des Moines, IA 50317

Industrial Pre-Treatment

     For information regarding industrial pre-treatment requirements, please refer to Chapter 118, Article III of the Municipal Code.

Contact Information

For questions or concerns please contact:

  • Paul Ebert, Regulatory Compliance Team Leader


                Phone:  (515) 323-8133       FAX:  (515) 323-8063

Wastewater Discharge Permits

     Prior to the WRA issuing a new or renewed permit to an industrial user (IU), the IU must submit a completed Wastewater Discharge Application form along with the appropriate annual permit fee to the Regulatory Compliance Department at the Des Moines WRF.  The annual permit fee for a Class A and Class B Wastewater Discharge Permit is $1000 and $400, respectively.  Information pertaining to fees associated with industrial wastewater discharge permits and related activities is listed in Sec. 118-352 of the City of Des Moines Municipal Code.

Slug Discharge Events at Permitted Facilities

     In the event of a slug discharge (as defined in your respective permit), the IU must immediately notify the WRF Treatment Manager and/or Regulatory Compliance Department at (515) 323-8010 or 8133.  If calling outside of normal working hours (7am-4pm), please call WRF Operations at 323-8040.  In follow-up to such an event, the IU shall fill out a Slug Discharge Form and promptly submit it to the Regulatory Compliance Department.

Authorization to Discharge to the POTW

     Discharge of any potentially harmful contaminants into the sewer system which may cause damage to the publicly-owned treatment works (POTW) or environment is not allowed without prior notification to and approval from the WRA Director.  Examples of such include (but are not limited to) various medical wastes, laboratory chemicals, various industrial wastes, contaminated groundwater, stormwater in containment areas, wastewater from construction activities/sites, petroleum products, pesticides, paint and other associated chemicals, etc.  If you are unsure if the waste is harmful, damaging, or hazardous, please call 323-8133 or 8010.  Prior to discharging any potentially harmful contaminants into the sewer system, please fill out a Discharge Authorization Form and submit it via fax to (515) 323-8063 and await approval.


At no time should hazardous waste or materials be disposed of into the sanitary or storm sewer system.  For proper disposal of hazardous waste, please contact the Metro Waste Authority Regional Collection Center in Bondurant, Iowa at (515) 967-5512.

Even certain non-hazardous wastes may be harmful to the sewer infrastructure, create a dangerous environment in the collection system, or pose a health hazard to Public Works employees and contractors.  A complete list of these prohibited discharges can be found in Sec. 118-342 of the Municipal Code.  Below is a summary.

  • pH of all materials discharged to the POTW shall be between 5.0-12.0
  • Pollutants shall not create a fire or explosion hazard
  • Pollutants shall not solidify or become viscous between 32-150 deg. F
  • Pollutants shall not cause interference or pass through at the treatment plant
  • Wastewater shall be less than 150 deg. F
  • Pollutants shall not result in the presence of toxic gases, vapors, or fumes
  • Wastewater shall not contain more than 3,000 mg/L of suspended solids or dissolved solids (such as salts, slurries, etc.)
  • Wastewater shall not have excessive coloration (dyes, tanning solutions, etc.)
  • All trucked or hauled wastes shall be brought to the Des Moines Wastewater Reclamation Facility for pre-approved disposal--discharge into private drains or public access points (manholes) is not allowed.