Wastewater Facility Overview

Wastewater Facility Overview

Facililty Benefits
  • Reliability to meet new quality effluent limits for removal of phosphorus and ammonia.
  • Higher quality effluent is released into Hawk Creek within the Minnesota River Basin. This will help improve water quality in Hawk Creek, the Minnesota River at Shakopee and the Mississippi River to reduce the overall phosphorus loading to Lake Pepin.
  • Provides sufficient capacity for local industries to expand and for the City of Willmar to grow for many years.
  • Unpleasant Odors are greatly reduced due to billions of bacteria breaking down and consuming waste.
Facility Data:
  • City of Willmar includes Eagle Lake Sanitary District and surrounding Service Area
  • Year 2030 Design Population Projection: 27,236
  • Average Design Flow is 7.51 mgd
Average Design Loadings:
  • The Organic Biological Oxygen Demand (BOD) load is 14,679 ppd
  • Our Total Suspended Solids (TSS) load is 9,621 ppd
  • Our Nitrogen load is 2,548 ppd
  • The Phosphorus load is 567 ppd
Effluent Limits
  • Our 5-Day BOD limit is 20 mg/L
  • The TSS limit is 30 mg/L
  • The Ammonia Nitrogen is 5 mg/L
  • Our Phosphorus limit is 1 mg/L
  • Our Dissolved Oxygen limit is 6 mg/L
Using Nature's Way

Microorganisms in lakes, rivers and streams clean pollutants from water by consuming "waste" as food and creating biomass. The biomass settles to the bottom of the water body where it is aerobically digested to inorganic matter, gas and water. The treatment process utilizes the same process in a controlled environment, adjusting the amount of microorganisms to the incoming waste (food) and aerobically digesting solids into stabilized matter that cam be used as a fertilizer and soil conditioner.