As it flows, stormwater runoff collects and transports pollutants to surface waters. Some of these pollutants are visible such as sediment, motor oil and trash, as well as pollutants that are not easily visible such as dissolved metals, nutrients, oxygen demanding substances, and organic chemicals.
Although the amount of pollutants from a single residential, commercial, industrial or construction site may seem unimportant, the combined concentration of contaminants threaten our lakes, rivers, wetlands, and other water bodies. Pollution conveyed by stormwater degrades the quality of drinking water and damages fisheries and habitat of plants and animals that depend on clean water for survival. Pollutants carried by stormwater can also affect recreational uses of water bodies by making them unsafe for wading, swimming, boating, and fishing.
Reporting Stormwater Discharge
Report an Environmental Concern
Stormwater Resources
Clean Water Act (CWA) In 1972, Congress passed the Clean Water Act (CWA) “to restore and maintain the chemical, physical, and biological integrity” of the Nation’s waters. The CWA set the basic structure for regulating discharge of pollutants into waters of the U.S.
National Pollutant Discharge Elimination System (NPDES) One of the ways the CWA sought to regulate discharges of pollutants to waters of the U.S. was through the National Pollutant Discharge Elimination System (NPDES) permitting program. NPDES permits contains limits on allowable discharges, monitoring and reporting requirements, and other provisions to ensure that discharges do not harm water quality or public health.
Idaho Pollutant Discharge Elimination System Authority to implement the NPDES program in Idaho was delegated to the Idaho Department of Environmental Quality (IDEQ) in phases beginning on July 1, 2018 until completion on July 1, 2021. Thus, the CWA implemented in Idaho is now called the Idaho Pollutant Discharge Elimination System (IPDES) on all non-tribal lands. The Environmental Protection Agency (EPA) still retains authority to permit NPDES activities on tribal lands in Idaho.
Idaho Transportation Department (ITD) has coverage under three different types of CWA permits, including:
- IPDES Construction General Permit (CGP) – Construction activities that disturb greater than one acre of land or are part of a larger common plan of development on non-tribal lands and have the potential to discharge stormwater to waters of the U.S. and are regulated by the IDEQ.
- NPDES CGP – Construction activities that disturb one acre or more of land or are part of a larger common plan of development on tribal land and have potential to discharge stormwater to waters of the U.S. and are regulated by the EPA.
- Municipal Separate Storm Sewer System (MS4) Permits – Stormwater drainage from roads or property that drains into conveyance systems owned by a municipality that meets certain criteria of population size and discharges into waters of the U.S. and are regulated by the IDEQ.
Go to ITD’s Form Finder web page – Use the numbers below to search & download the current ITD form(s).
Construction General Permit (CGP) Projects requiring a Stormwater Pollution Prevention Plan (SWPPP)
- ITD-2741 Form – Construction Stormwater Site Evaluation Worksheet
- ITD-2784 Form – Stormwater Site Assessment (for Design)
- ITD-2950 Form – Stormwater Pollution Prevention Plan (SWPPP) Narrative for Construction Activities
Guidance
- Stormwater Runoff Action Items Tool
- Buffer Design Decision Flow Chart
- Buffer Calculation Presentation
- Buffer FAQs
Non-CGP Projects requiring a Pollution Prevention Plan (PPP)
- ITD-2788 Form – Pollution Prevention Plan Template
Contractor Notes (CN)
Go to ITD’s Form Finder web page – Use the numbers below to search & download the current ITD form(s).
Inspection
- ITD-2802 Form – Stormwater Compliance Inspection Form (CGP Projects)
- ITD-2960 Form – LHTAC Transfer of SWPPP Inspection Responsibility
- ITD-2960-Instructions – LHTAC Transfer of SWPPP Inspection Responsibility (Instructions)
- ITD-2790 Form – Notice of Potential Violation of the CGP or Notice of Prohibited Discharge
SWPPP Management
- SWPPP Management Process Overview
- ITD-2950 Form- SWPPP Template, ITD-based Format
- ITD-2951 Form – Contractor or Local Entity CGP Signature Authority
- ITD-2952 Form – ITD Delegation of CGP Signature Authority
- ITD-2953 Form – Corrective Action Reporting Tables
- ITD-2954 Form – Subcontractor Certification of SWPPP
- ITD-2955 Form – SWPPP Modification Log
- ITD-2956 Form – Grading and Stabilization Activities Log
- ITD-2957 Form – Signature Sheet (Modifications and/or Corrective Action Reports)
- ITD-2958 Form – SWPPP Training Log
- ITD-2961 Form – Contractor Request to File Notice of Termination
Non-CGP Projects (PPP)
- ITD-2786 Form – Construction Site Inspection Report
- ITD-2789 Form – Stormwater Document Change Request
ITD projects with CGP coverage require Inspectors with current ITD Inspector Qualification and a Contractor representative with current ITD-approved Water Pollution Control Manager Training.
Water Pollution Control Manager Course Length: 16 Hours ITD requires all Contractors to designate a Water Pollution Control Manager (WPCM). The WPCM must attend an ITD-approved 16-hour stormwater management training course. This course has been developed to align with the 2022 CGP. Offerings are available at the following link.
AGC WPCM Training: http://web.idahoagc.org/events
Consultants – Construction Engineering & Inspection – Stormwater Inspector To certify, complete the ITD Inspector Qualification Training course – or – the Idaho Associated General Contractors (AGC) WPCM Training course (see above). Those who complete the AGC course must also submit an Inspector Qualification Registration Form ITD-2905, found in the ITD’s Contract Administration (CA) Manual, Section 114 or ITD’s Form Finder web page and a copy of their WPCM course completion certificate to:
Idaho Transportation Department Attention: Training & Development P. O. Box 7129 Boise, Idaho 83707-1129
ITD Stormwater Training ITD Inspector Qualification Training Course Length: 16 hours This course is required for ITD Construction Engineers, project managers, project inspectors, and maintenance staff to complete mandatory stormwater management training.
Municipal Separate Storm Sewer Systems (MS4) Permits
In some cases ITD is listed as a co-permittee with local municipalities that share or are connected to the same MS4 conveyance system. Annual reporting is required for MS4 permit holders.
District 1 Illicit Discharge Complaints
- For complaints or illicit discharges on the highway, please call: 208-772-1200
- For complaints or illicit discharges in the City of Coeur d’Alene, please call: 208-676-7405
For specific stormwater topics:
- Ryan Hawkins– Municipal Separate Storm Sewer System Permit – Hazardous Materials, Illicit Discharges, Illegal Connections, and Illegal Dumping
- Michael Hartz – Construction General Permit
Permits
District 1: Permit no. IDS-028223
District 1: Stormwater Management Program
Other Permittees in the MS4 Phase II Area
Phase II – District 1
District 2 Illicit Discharge Complaints
- For complaints or illicit discharges on the highway, please call: 208-799-5090
- For complaints or illicit discharges in the City of Lewiston, please call: 208-298-3900
For specific stormwater topics:
- Eric Hendren – Municipal Separate Storm Sewer System Permit – Hazardous Materials, Illicit Discharges, Illegal Connections, and Illegal Dumping
- Neal Scott – Construction General Permit
Permittees in the MS4 Phase II Area
Annual MS4 Permit Reports
- 2023-2024 Annual Report
- 2022-2023 Annual Report
- 2021-2022 Annual Report
- IDS-02825 | Compliance Letter
- 2020-2021 Annual Report
Phase II – District 2
- District 2: Permit no. IDS-028258
- Storm Water Management Program – District 2
- Lewiston MS4 Permit Area Map
- Lewiston MS4 Permit Outfall Map
- Monitoring & Assessment Plan
- Quality Assurance Project Plan (QAPP)
- Sediment Reduction Plan
Public Education
- Storm Water Pollution Compliance
- Erosion Sediment Guide
- Hazardous waste disposal? Learn more at: Transfer Station, City of Lewiston
- Chemical Storage and Spill Response Flyer
- Street Sweeping Practices in District 2
ITD Phase I and Phase II MS4
For complaints please call: 208-334-8300
- Greg Vitley – Municipal Separate Storm Sewer System Permit-Hazardous Materials, Illicit Discharges, Illegal Connections, and Illegal Dumping
- Chris Branstetter – Construction General Permit
- Public Education
What to do with household hazardous waste? Learn more at Household Hazardous Waste | City of Boise
ITD District 3 is a partner of the Partners for Clean Water group with local MS4 co-permittees.
If you’d like to speak to someone, you can call the Stormwater Pollution Prevention hotline at 208-395-8888. | Partners for Clean Water – Report an Issue
Phase I – District 3
- Phase I Permit – IDS027561
- Permit Area Map
- Phase I Storm Water Management Program
- Other Permittees in the IPDES MS4 Phase I Area
- ITD District 3 Phase I MS4 Annual Report
Phase II – District 3
- Phase II Permit – IDS028177
- Urbanized Area Map
- District 3 Phase II Stormwater Management Plan (SWMP)
- To comment on the SWMP contact Greg Vitley at: Greg.Vitley@itd.idaho.gov
- ITD District 3 Phase II MS4 Annual Report – April 2023
- ITD District 3 Phase II MS4 Annual Report – April 2022
Other Permittees in the NPDES MS4 Phase II Area
District 5: Permit no. IDS-028053
Phase II – District 5
- 2022-2023 Annual Report
- 2019-2020 Annual Report
- 2017-2018 Annual Report
- 2016-2017 Annual Report
- 2015-2016 Annual Report
- 2014-2015 Annual Report
- 2013-2014 Annual Report
- 2012-2013 Annual Report
- 2011-2012 Annual Report
- 2010-2011 Annual Report
- 2009-2010 Annual Report
- 2008-2009 Annual Report
- 2007-2008 Annual Report
- 2006-2007 Annual Report
District 6: Permit no. IDS-028070
Storm Water Management Program
Phase II – District 6
- 2022-2023 Annual Report
- 2021-2022 Annual Report
- 2020-2021 Annual Report
- 2019-2020 Annual Report
- 2018-2019 Annual Report
- 2017-2018 Annual Report
- 2016-2017 Annual Report
- 2015-2016 Annual Report
- 2014-2015 Annual Report
- 2013-2014 Annual Report
- 2012-2013 Annual Report
- 2011-2012 Annual Report
- 2010-2011 Annual Report
- 2009-2010 Annual Report
- 2008-2009 Annual Report