NPDES

This page has been created to comply with the provisions of the National Pollutant Discharge Elimination System (NPDES) Permit Number ILR10, issued by the Illinois Environmental Protection Agency (IEPA) for storm water discharges from construction site activities, and Permit Number ILR40 for Small Municipal Separate Storm Sewer Systems (MS4s).  

MS4 Documents

  1. ILR40 Permit (pdf)
  2. 2021 Notice of Intent (pdf)
  3. Notice of Coverage (pdf)

Annual Reports

Most Recent Report (pdf)

All Previous Reports (pdf)

Public Involvement, Education, and Outreach

Peoria County belongs to the Central Illinois Committee on NPDES (CICN), which is a collective group of local agencies working to comply with the Illinois EPA's NPDES Phase II Storm Water Regulations. Please visit the CICN Website to learn about the group and what is being done to eliminate pollution in our rivers, streams, and watersheds.

Routine Annual Monitoring

Peoria County performs routine annual visual monitoring of the Kickapoo Creek inside the urbanized area to check for pollutants that are entering the watershed.  If pollutants are found, Peoria County will contact the IEPA to locate and eliminate the source of the pollution.

Most Recent Inspection (pdf)

Previous Inspections (pdf)

ILR10 Permit - Construction Site Activities

All construction sites that exceed 1 acre require the owner to file a Notice of Intent with the IEPA and develop a Storm Water Pollution Prevention Plan (SWPPP) for the project.  All current Peoria County Highway Department projects that exceed one (1) acre of disturbance are listed below with links to the Notice of Intent, SWPPP, and Erosion Control Plans for the project.  


Graham Chapel Road Box Culvert Replacement

  1. Notice of Intent (pdf)
  2. SWPPP (pdf)
  3. Erosion Control Plan (pdf)

Old Galena Road Reconstruction

  1. Notice of Intent (pdf)
  2. SWPPP (pdf)
  3. Erosion Control Plan (pdf)