Sewer Utility


The Wastewater Utility provides wastewater treatment for the City of Menomonie. The wastewater plant treats only the wastewater that flows through the sanitary sewer system (toilets, sinks, floor drains, industrial process water, etc). The storm sewer system (street and parking lot drains) is separate and flows directly to Lake Menomin or the Red Cedar River. 

The wastewater treatment plant has a Wisconsin Pollutant Discharge Elimination System Permit issued by the Wisconsin Department of Natural Resources. This permit imposes strict discharge limits and monitoring requirements on the wastewater treatment plant. Just before being discharged to the Red Cedar River; the wastewater is sampled on a flow-proportional basis, 24 hours per day, 5 days per week, year round. The results are reported to the DNR to ensure that requirements are being met. 

The wastewater is tested for biochemical oxygen demand, total phosphorus, total suspended solids, ammonia, and pH daily. The wastewater is disinfected with ultra-violet light from May 1st to September 30th each year. During that time, E. coli bacteria analysis is performed to ensure the UV light is killing any harmful organisms. The wastewater is also periodically tested for acute and chronic whole effluent toxicity and mercury.

Please feel free to contact the wastewater treatment plant staff if you have any questions.

Good Sewer Practices

  1. Don't use your toilet as if it were a trash can. Personal wipes (even those that say "flushable"), baby wipes, cat litter, diapers, dental floss, Q-tips, feminine hygiene products, tissues, plastic items, etc all belong in the trash and not down the toilet or sink.
  2. Store kitchen grease in a container, let it harden, then dispose of it in the trash.
  3. The garbage disposal is not a substitute for trash or compost. Use your disposal sparingly. Food scraps should be put in the trash or composted. (If it goes down the drain you are paying to clean the water and for the disposal of the material - twice the expense). Coffee grounds, eggshells, and almost all kitchen scraps except meat, cheese, bones and dairy products can go in a compost pile.
  4. Use a fine screen in your shower drain to catch hair and a fine screen on the laundry hose to catch lint.
  5. Hazardous materials such as solvents, anti-freeze, oil based paints, and mercury or mercury containing compounds should not go down the drain. Unused medications can be disposed of at the Dunn County Sheriff's Department. Hazardous materials can be disposed of during the City's Clean Sweep Hazardous Waste collection event.
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