Located between New York’s Hudson River Valley and Rhode Island’s Narragansett Bay, Connecticut is home to 3.5 million people and encompasses 5.5 thousand square miles, making it the third smallest state by area, the 29th most populous, and the fourth most densely populated of the fifty states.

Connecticut’s topography varies from hilly slopes in the northwestern portion of the state to the southeastern coast along the Long Island Sound. Its climate, like many of its Southern New England neighbors, is experiencing shorter and warmer winters, hotter summers, longer and more intense heat waves, rising sea level, and bigger rain storms – all things that show climate change isn’t something that’s coming, it’s something that is here. Since the beginning of the 20th century, Connecticut’s temperatures have increased an average of 3 degrees.

Connecticut’s greatest climate change risks are inextricably intertwined with its 217 miles of Long Island Sound shoreline. Nearly 40 percent of its population lives in 36 coastal communities, all of which now face a dangerous combination of rising water levels and frequent storms.

As sea levels have risen along the Connecticut coastline, the number of tidal flood days have gradually increased overwhelming storm drains. Global sea levels are projected to rise another 1 to 4 feet by 2100 as a result of both past and future emissions from human activities, and even greater increases can be expected along the northeast U.S. coast following historical trends.

Natural gas and nuclear power fueled almost 95% of Connecticut’s utility-scale electricity generation in 2020. Only one nuclear power plant exists in Connecticut, the 2,073-megawatt Millstone nuclear power station. It supplied 38% of Connecticut’s net generation. Connecticut had one remaining coal-fired power plant at the Bridgeport Harbor Station, which contributed less than 0.1% of the state’s net generation in 2020. It closed in 2021. Renewable resources  (primarily solar, biomass and hydroelectric) provided about 5% of Connecticut’s electricity net generation in 2020 with petroleum contributing less than .1%

Connecticut does not have any crude oil reserves and does not produce or refine petroleum. However, a pipeline originating in New Haven delivers refined petroleum products to central Connecticut and terminates in central Massachusetts. About seven-tenths of the petroleum consumed in Connecticut is used in the transportation sector, primarily as motor gasoline. Connecticut does not have any natural gas reserves or production. Nor coal.

The Connecticut legislature has taken multiple steps to combat climate change and global warming. They first passed landmark legislation in 1990 and immediately strengthened it with an Act Concerning Connecticut Global Warming Solutions  requiring the state to reduce emissions by 10 percent (from 1990 emissions) by 2020, as well as mandating an 80 percent reduction (from 2001 emissions) by 2050. Their renewable portfolio standard (RPS), created in 1998,  has been revised several times since then. It now requires that increasing amounts of electricity sold in the state be generated from renewable resources, reaching 40% by 2030. Additionally, in June, 2019, Connecticut’s governor called for 100% carbon-free power by 2040 and almost simultaneously Connecticut’s Department of Energy and Environmental Protection (DEEP)  issued a RFP to solicit proposals to install up to 2,000 megawatts of offshore wind generating capacity by 2030. The state now has two offshore wind projects:  Revolution Wind, developed by Eversource Energy and Orsted, as well as Park City Wind, developed by Vineyard Wind.

The following year, in December, 2020, DEEP published a roadmap to achieve a 100% zero carbon electric sector by 2040.  Six months later, in June, 2021, the governor signed another bill establishing a goal of deploying 1,000MW of energy storage by the end of 2030, making it the eighth state to set an energy storage target.

Later that same month, West Hartford became the first town in Connecticut to commit to 100% clean energy, adopting a new Comprehensive Energy Plan and joining 14 counties, nine states, Washington D.C., Puerto Rico, and more than 180 communities across the United States in that commitment. A month later, Hamden, a town of about 62,000, approved an energy plan to build its first microgrid by 2025.

Connecticut is one of twenty four states, and Puerto Rico, committed to the U.S. Climate Alliance, which is working to implement policies that advance the goals of the Paris Agreement.


How a Connecticut Theater Put Energy Efficiency in the Spotlight

By Miguel Yanez-Barnuevo 02/03/23
The Bushnell Center for the Performing Arts, a nonprofit theater in Hartford, Connecticut, has been a mainstay for over 90 years, serving more than 30 million people and hosting more than 20,000 performances over that…
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Air quality can affect health. Climate change is worsening both.

By Jan Ellen Spiegel 01/22/23
Sandra Rapp has had breathing problems for at least 20 years. She was a heavy smoker — a habit she gave up 30 years ago — spent many years working in manufacturing and has lived…
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New England clean energy goals slam into oil reality

By Miranda Willson 01/18/23
New England power plants burned more oil for electricity on a single day during last month’s deep freeze than they have in four years, underscoring the gap between Northeastern states’ clean energy targets and the…
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Sea levels could rise 20 inches by 2050 due to climate change. Norwalk is developing plans to combat that.

By Abigail Brone 01/14/23
Staring down the possibility of a 20-inch rise in the sea level by 2050, city and state officials are outlining the flooding that Norwalk could experience if nothing is done to mitigate climate change.
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January in CT has been unusually warm. How does it compare to a ‘normal’ winter?

By Abby Weiss 01/12/23
After experiencing one of the top-10 warmest years on record in 2022, Connecticut is starting the New Year with an unusually mild winter.
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Boston Is Losing Its Snow Wicked Fast

By Katherine J. Wu 12/19/22
My first winter in Boston, the last patches of snow on my street didn’t melt until late June. It was 2015, the year the city broke its all-time record for annual snowfall: 110.3 inches, more…
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Connecticut becomes second US state to make climate change studies must for grades 5 to 12

By Mukul Sharma 12/18/22
Climate Change studies will be mandatory in the US state of Connecticut from grades 5 to 12. The development, hailed as ‘landmark’ by climate change activists, comes after a new law passed earlier this year…
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‘Face it head on’: Connecticut makes climate change studies compulsory

Enshrining the curriculum in law insulates the subject from budget cuts and culture wars related to the climate crisisStarting next July, Connecticut will become one of the first states in America to mandate climate change…
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James O’Donnell: A decade of change for Connecticut and climate change

By James O'Donnell 11/14/22
Connecticut has always been a leader in climate change research and policy. In 1862 professors from Yale published the results of their analysis of temperature measurements in New Haven. They compared data from 1779-1820 to…
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Connecticut towns awarded climate leader designation

By Hallie Letendre 11/11/22
Connecticut towns are doing well recently in helping the environment during times of heightened threats of climate change, an NBC Connecticut article said. The organization Sustainable CT has awarded five Connecticut towns climate leader designation titles,…
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Stratford Awarded Climate Leader Designation From Sustainable CT

By Vincent Salzo 11/06/22
The Town of Stratford was recently awarded the Climate Leader Designation by Sustainable CT at the annual CCM Conference and the award will be presented once more at the upcoming Sustainable CT Awards Celebration on…
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Biden-Harris Administration Announces Nearly $600,000 for Community Air Pollution Monitoring Projects in Connecticut Communities

The U.S. Environmental Protection Agency (EPA) has selected two Connecticut organizations to receive $568,755 in grants to conduct community air quality monitoring in Ansonia, Derby, and Stamford, Conn. The grants are among 132 air monitoring…
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Vermont Joins Multi-State Effort to Create Regional Clean Hydrogen Hub in Northeast

Governor Kathy Hochul today announced Vermont has signed on to a multi-state agreement, joining with New York, Connecticut, Maine, Massachusetts, New Jersey and Rhode Island, to develop a proposal to become one of up to…

Comcast to Source Clean, Renewable Electricity for Nearly Half of New England Operations

Comcast today announced an agreement with Constellation to purchase 70 megawatts (MW) of renewable solar electricity from the Gravel Pit Solar project in East Windsor, Connecticut for nearly half of its Comcast Cable and NBCUniversal…

Connecticut Republicans pitch energy relief plan

Connecticut Republicans are pitching their own energy relief plan that calls for reducing electricity costs by cutting state taxes and eliminating utility bill surcharges.

Governor Lamont Introduces Energy Action Plan Highlighting Help With Energy Affordability

Governor Ned Lamont today announced a comprehensive statewide strategy funded by federal and state dollars to provide energy assistance to Connecticut residents in the short-term and improve affordability and reliability in the long-term.

Solar program aims to cut energy costs for lower-income Rhode Island residents

The New England state recently issued a request for proposals from solar companies to partner on a program that will lease and install solar equipment on homes owned by low- to moderate-income residents. Solar program…

In Connecticut, Climate Change is Another Way to Say Opportunity

A panel of University of Connecticut climate experts discussed how Connecticut could become the Silicon Valley of sustainable energy during a roundtable in Greenwich on Nov. 16.

Avangrid officials: Company still committed to Park City Wind project despite pushing back completion

A spokesman for Orange-based Avangrid's Park City Wind project said the company remains committed to the renewable energy project and plans to redevelop a portion of Bridgeport's waterfront as a staging area for the project,…

New England states poised to capitalize on new federal climate law incentives

Years of work crafting climate and clean energy plans have left New England states in a prime position to take advantage of renewable energy incentives in the historic climate bill enacted by Congress over the…

Connecticut energy and environment chief outlines updated clean energy plan on path to zero emissions

The Connecticut Department of Energy and Environmental Protection is preparing to issue a request for proposals for solar generation in the first step of an updated procurement plan that aims to meet the state’s goal…

Governor Lamont Announces Clean Energy Investment Plan and Plans for Next Procurement of Energy Resources To Meet Climate Goals

Governor Ned Lamont today announced a new energy investment plan to secure low-cost clean energy to meet Connecticut’s climate goals through the release of the Department of Energy and Environmental Protection (DEEP) 2022 Procurement Plan.…

Governor Lamont Signs Key Climate Change And Energy Legislation

Governor Ned Lamont today announced that he has signed into law two bills that further demonstrate Connecticut’s commitment to mitigating the impacts of the climate crisis by decarbonizing our electric sector and expanding existing renewable…


WHEREAS, there is overwhelming and incontrovertible evidence that man-made greenhouse gas emissions are causing climate change, and that according to the Long Island Sound Study and the


Catalyst Power Holdings LLC ("Catalyst Power"), an integrated provider of cleaner energy solutions for the commercial and industrial sector, is launching diversified power services in Connecticut. Catalyst Power provides a range of cleaner energy solutions…

DEEP and City of Meriden Announce Food Scrap Co-Collection Pilot Program For 1,000 Households

The Connecticut Department of Energy and Environmental Protection (DEEP) and the City of Meriden announced today the launch of “Making Meriden Green,” a first-of-its-kind municipal food scrap co-collection pilot program that will demonstrate how waste…

Buoyed by federal funding, Connecticut makes big investments in transportation and climate projects

The state bond commission on Tuesday approved nearly $840 million to fund transportation system upgrades, including highways, bridges and train stations. It also approved $124 million for downtown redevelopment projects, job creating grants and minority…

Governor Lamont, Congressman Courtney, and Mayor Passero Applaud Final Approval To Proceed in State Pier Redevelopment Project

Governor Ned Lamont, Congressman Joe Courtney, and Mayor Michael Passero today are applauding the Connecticut Port Authority Board of Directors for issuing a notice to proceed to its construction manager to begin permitted dredging activities…

Governor Lamont Signs Executive Order Directing Connecticut State Agencies To Implement Actions That Reduce Carbon Emissions and Adapt to Climate Crisis

Governor Ned Lamont today announced that he has signed an executive order (Executive Order No. 21-3) directing Connecticut executive branch state agencies to take significant actions within their authority to reduce carbon emissions and prepare…

West Hartford is First Connecticut Town to Commit to 100% Clean Energy

On June 22, 2021, West Hartford adopted a new Comprehensive Energy Plan and joined 14 counties, nine states, Washington D.C., Puerto Rico, and more than 180 communities across the United States in committing to 100%…

Connecticut details incentives, equity goals for energy storage program

Connecticut announced Wednesday that it will offer incentives for residential and business customers to purchase and install energy storage systems as part of an Equitable Modern Grid initiative.

Hamden, Connecticut, Plans Microgrids to Help Meet Energy Goals

Hamden, Connecticut’s city council approved an energy plan that calls for building microgrids, shifting to renewable energy and slashing overall energy use.

In Connecticut, another boost for fuel cell industry reignites subsidy debate

Connecticut’s fuel cell industry scored a win last week when Gov. Ned Lamont signed into law a bill requiring the state’s electric distribution companies to solicit up to 30 megawatts in new fuel cell generation projects by…

Wind power and renewable energy are big growth opportunities for CT

As Connecticut emerges from the pandemic, clean technology can catapult the state’s economy for years to come.

Branford Announces New Solar Initiatives

By Press Release , town of Branford 06/06/21
Utilizing the Connecticut Green Bank's Solar Marketplace Assistance Program (MAP), First Selectman James Cosgrove requested an analysis of all municipal and school buildings to identify ways to achieve energy savings through energy efficient projects and/or…

An act concerning energy storage

To (1) create solar energy storage goals, (2) increase the virtual net metering cap, (3) permit ownership of solar power generation facilities by electric distribution companies, and (4) direct the Department of Energy and Environmental…

Preparing for Climate Change in Connecticut

This page provides an overview of the steps Connecticut is taking to prepare for the impacts of climate change.

Connecticut Renewable Portfolio Standard

The Connecticut Renewable Portfolio Standard (RPS) is a state policy that requires electric providers to obtain a specified percentage or amount of the energy they generate or sell from renewable sources.

State of Connecticut Bill No. 1138


State of Connecticut Executive Order

One of the State of Delaware’s major steps toward creating a better environment was passing the Renewable Energy Portfolio Standards Act in 2005, which was intended to establish a market in Delaware for electricity from…

Building a low carbon future for Connecticut

Achieving a 45% GHG reduction by 2030: Recommendations from the Governor's council on climate change

Hartford Climate Stewardship Initiative Climate Action Plan

The City of Hartford Planning & Zoning Commission and City Council have formally approved Hartford’s first Climate Action Plan!

2018 Comprehensive Energy Strategy

The Department of Energy and Environmental Protection (DEEP) has prepared an update to the CES to advance the State’s goal to create a cheaper, cleaner, more reliable energy future for Connecticut’s residents and businesses. By statute, DEEP…


Oregon Solar Panels: Pricing and Incentives

Oregon was one of the earliest adopters of solar power in the country. And despite the state’s reputation for gloomy weather, it ranks among the top half of states for solar energy generation, and it’s…

Connecticut Solar Panels: Pricing and Incentives

Like many states, Connecticut began investing in solar energy decades ago. Currently, the state ranks in the top half of all states for solar generation, with 2.53% of Connecticut’s energy coming from solar power. Solar…

Connecticut State Profile and Energy Estimates

Connecticut is located in southern New England on hilly terrain between New York's Hudson River Valley and Rhode Island's Narragansett Bay. Although Connecticut does not have any fossil fuel reserves, it does have renewable resources.2…

Energy State Bill Tracking Database

The searchable Energy Storage Legislation Database displays information in interactive maps and charts, tracking state activity from 2017 to the present.

The First National Flood Risk Assessment

The First Street Foundation Flood Model represents the culmination of decades of research and development made possible by building upon existing knowledge and frameworks regularly referenced in the identification of flood risk.

The Impacts of Climate Change and the Trump Administration’s Anti-Environmental Agenda in Connecticut

Between 2017 and 2019, Connecticut experienced two severe storms and two winter storms. The damages of these events led to losses of at least $1 billion.

State-by-State: Connecticut

Connecticut is vulnerable to increasing temperatures, floods and droughts, and coastal flooding

Our Focus: Climate Change

We’re working towards a New England powered by affordable, homemade energy, with a thriving economy built on innovation and invention… a New England where our communities are healthy and safe and our environment fortified against…

Connecticut Solar

Connecticut is one of the fastest growing of the smaller states in the solar industry. This success comes after the state launched the Connecticut Property Assessed Clean Energy (C-PACE) program to offer property assessed clean…

Connecticut Renewable Energy

Almost half of the electricity produced in Connecticut comes from the Millstone Nuclear Power Plant. This plant has 0 carbon emissions, and produces enough electricity to power 2 million homes. Natural gas accounts for most of…

Renewable Energy

The term renewable energy generally refers to electricity supplied from renewable energy sources such as wind and solar power, geothermal, hydropower, and various forms of biomass. These energy sources are considered renewable sources because they…

Energize Connecticut

The Energize Connecticut initiative helps you save energy in your Connecticut home or business with rebates, financing and services for energy efficiency and clean energy improvements. Use Connecticut’s Official Rate Board to compare generation supplier…

CT Climate Change

A longtime leader on climate change, Connecticut strives to develop and support forward-thinking climate-related policies and legislation, as well as participate in groundbreaking regional initiatives. Addressing climate change in a meaningful way presents residents, businesses, non-profits,…

Renewable Energy

Renewable energy is a form of clean energy that is provided by natural sources that continuously replenish themselves. Our Energy 101: Renewable Energy pages give an overview of Class I renewable energy sources as updated…

Southeastern Connecticut Regional Resilience Guidebook

The communities in Southeastern Connecticut already exhibit strong regional action in some arenas and have a number of institutional bodies in place to facilitate a regional approach to planning. The Southeastern Connecticut Council of Governments…


Middletown resolution would take a hard stance on climate change

By Cassandra Day   08/18/20  
“It’s at the local level where that will become a reality — local projects and initiatives to move toward more sustainable projects that will actually move the needle,” Florsheim said. “Even in the absence of…
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Connecticut green bonds offer residents a chance to fund war on climate change

Lisa Prevost   07/09/20  
The state’s green bank hopes to inspire residents to help fund clean energy investments to combat climate change.
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Connecticut bill would give homebuyers, renters more transparency on energy costs

By Lisa Prevost   03/06/20  
The legislation is backed by state environmental groups and regulators but opposed by the real estate lobby.
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New offshore wind award is largest renewable project ever for CT

By Jan Ellen Spiegel   12/05/19  
In what is the single largest purchase of renewable power ever by the state, the Connecticut Department of Energy and Environmental Protection announced Thursday it has chosen Vineyard Wind to develop an 804-megawatt offshore wind…
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Connecticut governor calls for 100% carbon-free power by 2040

By Catherine Morehouse   09/05/19  
Connecticut Gov. Ned Lamont, D, signed an executive order Tuesday directing state regulators to lay out a plan to reach 100% carbon-free electricity by 2040.
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CT offshore wind may face some rough seas

As Connecticut races to get its first offshore wind projects on track for construction, a collision of factors appear to be working against them.
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Connecticut House passes bill mandating education of human-induced climate change

By Morgan Gstalter   05/29/19  
The Connecticut House on Tuesday passed a bill to make Connecticut the first state to mandate the teaching of human-induced climate change.
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Conn. joins multi-state pact to tax auto emissions

By Bill Cummings   02/21/19  
Connecticut has entered into a landmark agreement with neighboring states to help battle climate change and reduce auto emissions by creating a new system to fund regional transportation improvements. The nine states and Washington D.C.…
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Traditional and renewable energy ‘at odds’ in Connecticut

By Bill Cummings   01/31/19  
Renewable energy producers say the state’s electricity is cleaner than ever, but the struggle with traditional power sources continues.
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MIT-Yale team spots revelation in Connecticut solar market

By Alexander Soule   10/24/18  
In a new study published in the scientific journal Nature analyzing the Connecticut residential solar market, researchers found that sales were highest in towns where “solar ambassadors” touted the benefits of their own systems to…
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Acknowledging sea level rise, Connecticut legislature passes sweeping climate change bill

By E.A. Cruden   05/09/18  
The Connecticut Senate passed a sweeping climate change bill Wednesday, in a move that could push the state ahead of much of the coastal United States. The legislation centers on adapting to accommodate rising sea…
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