Dec 8, 1999 · Beginning on March 10, 2003, construction sites that disturb one acre or more are required to have coverage under the NPDES general permit for storm water discharges from …

Information and Updates for Stormwater Permit Requirements.

Does Your Construction Site Need a Stormwater Permit? A Construction Site Operator’s Guide to EPA’s Stormwater Permit Program All construction sites disturbing 1 or more acres (with few exceptions) …

Aug 26, 2025 · A stormwater permit provides detailed requirements for managing stormwater runoff, which is precipitation and snowmelt that flows over land or impervious surfaces without soaking into …

Phase I of the NPDES Storm Water program began in 1990 and required medium and large municipal separate storm sewer systems (MS4s) to obtain NPDES coverage.

This program was developed to address water pollution by regulating the discharge of pollutants to waterways. The Illinois Environmental Protection Agency (IEPA) issues three types of stormwater …

To apply for an individual permit or for coverage under a statewide general permit you must file an application with the Illinois Environmental Protection Agency prior to commencement of your …

A stormwater permit defines a facility’s limits on what types and volumes of pollutants can be discharged into waters of the United States. It also includes requirements for monitoring and reporting to help …

U.S. Environmental Protection Agency | US EPA

Jul 8, 2025 · So what is a "stormwater permit"? The simplest, easiest answer is it is a permit that lets your facility release pollutants through stormwater runoff that lands on your property, gets dirty, and …