McHenry County, IL
Home MenuNational Pollutant Discharge Elimination System
The goal of the federally mandated National Pollutant Discharge Elimination System (NPDES) Phase II program is to preserve, protect and improve the Nation's water resources from polluted stormwater runoff. NPDES Phase II is intended to reduce adverse impacts to water quality and aquatic habitat by instituting the use of controls on the unregulated sources of stormwater discharges that have the greatest likelihood of causing continued environmental degradation.
NPDES Phase II requires operators of Municipal Separate Storm Sewer Systems (MS4s) in urbanized areas to implement Best Management Practices (BMPs) defined in six minimum control measures to control polluted stormwater runoff. McHenry County falls under the MS4 classification; and therefore, submits a Notice of Intent (NOI) General Permit No. ILR4000264 to the Illinois Environmental Protection Agency (IEPA). The NOI contains general information about McHenry County as well as the BMPs to be implemented for each of the six minimum control measures that are given below:
- Public Education and Outreach on Storm Water Impacts
- Public Involvement/Participation
- Illicit Discharge Detection and Elimination
- Construction Site Storm Water Runoff Control
- Post-Construction Storm Water Management in New Development and Redevelopment
- Pollution Prevention/Good Housekeeping for Municipal Operations
For complete information visit the EPA website.
General Permit No. ILR40
- March 1, 2016 through February 28, 2021
- April 1, 2009 through March 31, 2014 (Administratively Continued by IEPA)
- March 10, 2003 through February 29, 2008
Notice of Intent (NOI)
- 2021-2026 5 Year for NPDES Program Plan (Approved by IEPA to 2030)
- 2009-2015 5 Year NOI for NPDES Program Plan
- 2003-2008 Original 5 Year NPDES Implementation Plan
Annual Facility Inspection Report
- Year 23 (March 2025 - March 2026)
- Year 22 (March 2024 - March 2025)
- Year 21 (March 2023 - March 2024)
- Year 20 (March 2022 - March 2023)
- Year 19 (March 2021 - March 2022)
- Year 18 (March 2020 - March 2021)
- Year 17 (March 2019 - March 2020)
- Year 16 (March 2018 - March 2019)
- Year 15 (March 2017 - March 2018)
- Year 14 (March 2016 - March 2017)
- Year 13 (March 2015 - March 2016)
- Year 12 (March 2014 - March 2015)
- Year 11 (March 2013 - March 2014)
- IEPA Notice of Coverage 2012
Stormwater Management Program Plan (SMPP)
- Year 23 (Revised May 2026)
- Year 22 (Revised May 2025)
- Year 21 (Revised May 2024)
- Year 20 (Revised May 2023)
- Year 19 (Revised May 2022)
- Year 18 (Revised May 2021)
- Year 17 (Revised May 2020)
- Year 16 (Revised May 2019)
- Year 15 (Revised May 2018)
- Year 14 (Revised May 2017)
- Year 13 Revised for New Permit Requirements (Revised August 2016)
- Year 13 (Revised May 2016)
- Year 12 (Revised May 2015)
- Year 11 (Revised May 2014)
Articles
NPDES Phase II Stormwater Links
EPA Sites
Homeowners
- Healthy Household Habits for Clean Water
- Water-Efficient Landscaping
- Urbanization and Stormwater Runoff
Climate Change
Construction Sites
- Construction Stormwater Pollution Prevention Plan
- Maintain Your BMPs!
- IEPA NPDES General Construction Stormwater Permit Checklist
Auto-Related Businesses
- Environmental Compliance for Automotive Recyclers
- Stormwater Mgmt - Auto Recycler Owners & Operators Guide
McHenry County Conservation District (MCCD)
McHenry County Division of Transportation (MCDOT)
Fox River Study Group (FRSG)
Training Resources
MS4 "Illicit Discharge Detection and Elimination" (IDDE) Training Video
This 14¼ minute video focuses on the hazards of illicit discharges and shows employees how to spot them.