Water

Page 11 of 12

• Inland Wetlands and Watercourses Municipal Permitting

  Information about the municipal permitting process for activities proposed in inland wetlands and watercourses

• Non Point Source Annual Reports

• Non Point Source Management Success Stories

• Flood Management

  DEEP's Flood Management

• The Torrent - A Newsletter for Floodplain Managers

  The Torrent newsletter is about floodplain management issues.

• National Flood Insurance Program (NFIP)

  Information about the National Flood Insurance Program

• Cyanobacteria Blooms

  Cyanobacteria, also known as blue-green algae, occur naturally in lakes and ponds throughout Connecticut.  These microscopic organisms often go unnoticed and cause no harm.  However, excessive nutrient pollution and climate change are causing waterbodies to experience more frequent nuisance cyanobacteria blooms that may produce and release toxins.  When cyanobacteria blooms release toxins, people and animals using the water body for recreation can have health effects.  It is important to note that not all algal blooms are harmful algae blooms (HABs), however it is not possible to determine the level of toxins in the water without a more detailed evaluation. Out of precaution it is best to avoid direct contact with water experiencing a bloom.  When in doubt, stay out!   

• Water Quality Reclassification

  Information regarding a request to change the surface or ground water quality classification of a property or area

• Fact Sheet for the Water Quality Standards and Classifications

  The Connecticut Water Quality Standards form the foundation of water quality programs in CT. This fact sheet provides a summary of water quality classification definitions and provides general information.

• Water Quality Standards and Classification

  The Connecticut Water Quality Standards establish the water quality goals of Connecticut's waterbodies and form the foundation of Connecticut's water management programs.

• Dam Permitting

• Water Diversion Program

  Connecticut Water Diversion Program Information and Reporting Forms

• Triennial Review of the Connecticut Water Quality Standards

  Topics under Consideration for Revision within the WQS Regulations 2025

• Long Island Sound Water Quality and Hypoxia Monitoring Program Overview

  The CT DEEP Water Monitoring Program, on behalf of the Long Island Sound Study estuary program, performs an intensive year-round water quality monitoring program on Long Island Sound. The data collected are used to understand the current conditions and changes in the water quality of the Sound.

• Hypoxia Maps - Summer 2025