Helps identify whether any receiving waters to which you discharge are listed as impaired (and the pollutant for which it is impaired) and whether an approved total maximum daily load (TMDL) exists for that waterbody.
- Seasonally Dry Period Locator Tool (xlsx) (3.76 MB) - This tool helps you determine if your site is in an arid or semi-arid climate and the seasonally dry months for your site location. To use the tool, download the Excel file and enter your site’s zip code. The tool will return text indicating if your site is located in an arid or semi-arid climate and, if applicable, the seasonally dry months for your site.
- Seasonally Dry Period Locator Tool-Supporting Figures (pdf) (1.08 MB) - These maps show areas of the U.S. that have an arid or semi-arid climate and the months that those areas are considered seasonally dry.
SWPPP Templates
How to develop a Stormwater Pollution Prevention Plan (SWPPP)
These resources help operators develop effective SWPPPs that are required under construction stormwater permits. Note that construction site SWPPPs must follow the requirements of the applicable State or EPA CGP and must describe the specific conditions of the site and plans for development.
- Construction Stormwater Pollution Prevention Plan (SWPPP) Template (docx) (327.22 KB) - Helps construction site operators develop a SWPPP that is compliant with the minimum requirements of EPA’s 2022 CGP.
- Plantilla del Plan de Prevención de la Contaminación de Aguas Pluviales en la Construcción (PPCAP) (docx) (309.33 KB) - Ayuda a los operadores de proyectos de construcción a desarrollar un PPCAP que cumpla con los requisitos mínimos del Permiso General de Construcción 2017 de la EPA.
- Small Residential Lot SWPPP Template (docx) (9.14 MB) - Helps small residential lot builders develop a streamlined SWPPP that is compliant with the minimum requirements of EPA's 2022 CGP.
- Stormwater Pollution Prevention for Small Residential Construction Sites (pdf) (3.42 MB) - An educational brochure that provides basic erosion and sediment control and stormwater pollution prevention guidance common to all small residential lot projects.
Determine 2-Year, 24-Hour Storm Event for Sediment Basin Design
Part 2.2.12 of EPA’s 2022 CGP indicates that if you install a sediment basin, one of the two alternative design requirements is to provide storage for the calculated volume of runoff from a 2-year, 24-hour storm.
- 2022 CGP - 2-Year, 24-Hour Storm Frequencies (pdf) (382.32 KB) - EPA compiled this information to help determine the volume of precipitation associated with the local 2-year, 24-hour storm event.
Inspection and Corrective Action Report Templates and Other Guidance
EPA developed the following templates to help you document your findings for site inspections, dewatering inspections, and corrective actions as required by the 2022 CGP. These templates are formatted to be filled out electronically or manually and include text fields that direct you to populate the forms with your site-specific information.
- Site Inspection Report Template (docx) (91.85 KB) - This inspection report template is designed to assist you in preparing inspection reports that meet the requirements in Part 4.7 of the 2022 CGP.
- Dewatering Inspection Report Template (docx) (64.37 KB) - This dewatering inspection report template is designed to assist you in preparing inspection reports related to dewatering activities required by Part 4.6.3 of the 2022 CGP.
- Corrective Action Log Template (docx) (53.29 KB) - This corrective action log form is designed to assist you in recording the required corrective action documentation that meet the requirements in Part 5.4 of the 2022 CGP.
- - This guidance will assist you in determining whether problems found on the construction site related to stormwater controls require routine maintenance or corrective action.
Monitoring and Inspection Guide for Construction Dewatering
- Monitoring and Inspection Guide for Construction Dewatering (pdf) (2.04 MB) - This guide provides information on how to correctly monitor for turbidity (if applicable), determine if your weekly average turbidity values exceed the benchmark, and, if so, how to proceed with corrective action. The guide also reviews correct procedures for conducting dewatering inspections.
Tiered Waters
EPA’s CGP has special requirements for discharges to waters that receive Tier 2, Tier 2.5, or Tier 3 protections for antidegradation purposes.
- 2022 CGP - Tier 3, Tier 2, and Tier 2.5 Waters (pdf) (218.83 KB) - This list is provided as a resource for operators covered by the CGP to determine whether they discharge to a Tier 2, Tier 2.5, or Tier 3 water.
Professional Resources
- Small Construction Program Overview (Fact Sheet 3.0) and Construction Rainfall Erosivity Waiver (Fact Sheet 3.1) - Provide overview information about the construction program and the construction rainfall erosivity waiver.
- Small Construction Program Overview (pdf) (298.64 KB)
- Construction Rainfall Erosivity Waiver (pdf) (2.5 MB)
- Certified Professional in Erosion and Sediment Control
- Spanish Sediment and Erosion Control BMP Fact Sheet / Hoja Informativa sobre Control de Sedimentación y Erosión
- Spanish Pollution Prevention BMP Fact Sheet / Hoja Informativa sobre Prevención de la Contaminación
- NPDES Home
- About NPDES
- All NPDES Program Areas
- Animal Feeding Operations
- Aquaculture
- Forest Roads
- Industrial Wastewater
- Municipal Wastewater
- National Pretreatment Program
- Pesticide Permitting
- Stormwater
- Water Quality Trading
