Non-tidal Permits

Licenses for Activities in Non-Tidal Waters 

Non-tidal refers to inland wetlands, watercourses, and non-consumptive diversion projects. 

Supporting documents can be found on our LWRD Forms and Instructions page.

Disclaimer: DEEP only regulates inland wetlands on state land or associated with state action. All other inland wetland projects are regulated at the municipal level. Please view our Inland Wetlands and Watercourses pages for more information. Projects in or adjacent to non-state managed inland wetlands may still require permits from other state programs.  

The following permit applications all require the same application, attachments, and follow the same instructions: 

• Section 401 Water Quality Certificate (Non-tidal);
• Pre-Construction Notification, USACE General Permits for CT;
• Inland Wetlands and Watercourses;
• Water Diversion Non-Consumptive 

Application: Form L (09/02/20) Word, PDF 

Instructions (12/13/21) 

Supporting documents needed for this application are: 

Attachments 1, 5, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 23, 28, 30, 41, 42 

Additional Information: 

Inland Wetlands (State agencies only)  

Non-Consumptive Water Diversion (Public, municipal, and state agencies)

General Permit for Water Resources Construction Activities (DEEP-IWRD-GP-013); Re-Issued 06/04/2024; Briefing Document 

Activities 1-5: Maintenance Plans and Activities on State Property: 

Application: Form M (05/20/24) PDF 

Supporting document needed for this application is: Attachment 14 

Additional Information: Water Resource Construction Activities 

Activities 6-9: Infrastructure, Upgrades, and Conservation Activities: 

Application: Form N (07/11/24) PDF 

Supporting documents needed for this application are: 

Attachments 8, 9, 10, 14, 16, 18, 20, 23 

Additional Information: Water Resource Construction Activities 

Activity 10: Infrastructure Projects with Interagency Coordination: 

Application: Form O (07/11/24) PDF 

Supporting documents needed for this application are:

Attachments 29, 31, 32 

Additional Information:

Water Resource Construction Activities

Notice of Correction of Clerical Error

Please note that the above resources apply to state permitting only. For information related to Municipal Inland Wetland Agencies, please visit our Inland Wetlands and Watercourses home page. You can also check out our new Roles and Responsibilities outreach poster, which gives a brief overview of the varied levels of inland wetland management we have in Connecticut. 

Content last updated on April 28, 2026