Climate Change
Addressing climate change presents residents, businesses, nonprofits, and municipalities a chance to create, evolve, and maintain a sustainable environment, a robust economy, and a higher quality of life today and tomorrow.
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2007 Guidance Document for Design of Large-Scale On-Site Wastewater Renovation Systems
The Guidance Document for Design of Large-Scale On-Site Wastewater Renovation Systems (OWRS) is intended to provide information and methodologies for the design, construction, operation and maintenance for those wastewater renovation systems which are under the Department’s regulatory authority.
CT Stormwater Quality Manual - Errata Sheet
Errata Sheet for 2004 Connecticut Stormwater Quality Manual
The General Permit for the Discharge of Stormwater from Small Municipal Separate Storm Sewer Systems (MS4 General Permit) is the product of a mandate by the U.S. Environmental Protection Agency (USEPA) as part of its Stormwater Phase II rules in 1999. This general permit requires each municipality to take steps to keep the stormwater entering its storm sewer systems clean before that stormwater enters water bodies.
Stormwater is water resulting from rain or snowmelt that runs off surfaces such as rooftops, paved streets, highways and parking lots. Stormwater results in significant pollution to surface water affecting primary contact recreation such as swimming and aquatic life use support. DEEP is working to engage stakeholders to prevent the introduction of pollutants into stormwater through its Non Point Source Pollution Management and Coastal Nonpoint Source Pollution Control Programs.
Video Tutorial -- General Permit with modifications
The following tutorial is an overview of the requirements of the General Permit for the Discharge of Stormwater Associated with Industrial Activity, effective October 1, 2011. The video presents general information on permit conditions, control measures, inspections, monitoring, benchmarks, impaired waters requirements, and a discussion of specific requirements for Sector G--Transportation and Public Works Facilities.
These guidelines have been developed to clarify DEEP recommendations to state and municipal officials, and others regarding the removal and disposal of snow accumulations from roadways and parking lots. For purposes of this guidance snow accumulations refers to snow banks and snowpiles that are removed by front-end loader or by loading on trucks for disposal.
This page provides specific instructions to former registrants under the Vehicle Maintenance Wastewater general permit on how to complete the Discharge Notification Form to POTW Authority for the General Permit for Discharges from Miscellaneous Industrial Users (MIU GP).
United Aluminum Corporation, North Haven
Notice of tentative determination to approve an application submitted by United Aluminum Corporation for renewal of a Title V permit. Written comments are due by March 17, 2026.
Milford Power Company, LLC - DIV-202510001
Notice of tentative determination to approve an application submitted by Milford Power Company, LLC for proposed activity that includes the withdraw up to 8.0 Million gallons per day from the Housatonic River. This activity will affect the Housatonic River. Written comments due by May 7, 2026.
Notice of tentative determination to approve an application submitted by Polly-Rob LLC to construct and operate a compost facility. Written comments due February 8, 2026.
Wieland Rolled Products North America, LLC, Waterbury
Notice of tentative determination to approve an application submitted by Wieland Rolled Products North America LLC for a New Source Review permit. Written comments are due by February 15, 2026.
Southeastern Connecticut Regional Resources Recovery Authority, Preston
Notice of tentative determination to approve an application submitted by Southeastern Connecticut Regional Resources Recovery Authority to construct and operate a solid waste facility. Written comments due February 14, 2026.
Smart Feed Tech., Inc. (dba Bright Feeds), Berlin
Notice of tentative determination to approve an application submitted by Smart Feed Tech., Inc. dba Bright Feeds for a New Source Review Permit. Written comments are due by May 9, 2026.
Climate Change
Addressing climate change presents residents, businesses, nonprofits, and municipalities a chance to create, evolve, and maintain a sustainable environment, a robust economy, and a higher quality of life today and tomorrow.
Recycling
Connecticut disposes of 2.4 million tons of trash annually, an estimated 1,370 pounds of trash per person per year. That's too much! Learn more about how we manage our waste and how to help us move toward more waste reduction, reuse and recycling.
DEEP Programs & Services
DEEP conserves, improves and protects Connecticut's natural resources and the environment, and makes cheaper, cleaner and more reliable energy available to people and businesses. Find DEEP's programs and services here.