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How the Connecticut gas options differ
PURA describes firm transportation service for commercial and industrial customers and maintains approved gas marketer information. Its commercial program should not be confused with residential gas service.
Check the local distribution company’s active marketer list as well as PURA approval. Supplier authorization and willingness to quote this account are separate questions.
Utility and commercial service map
This map covers the utility routes represented by our Connecticut city guides. It is not an exhaustive statewide utility or supplier roster. A community or county listing does not confirm an individual service address.
| Gas service company | Review route | Classification to establish |
|---|---|---|
| Southern Connecticut Gas | Connecticut firm transportation | Commercial or industrial class and the distribution company’s firm-transportation requirements |
| Yankee Gas / Eversource | Connecticut firm transportation | Commercial or industrial class and the distribution company’s firm-transportation requirements |
| Connecticut Natural Gas | Connecticut firm transportation | Commercial or industrial class and the distribution company’s firm-transportation requirements |
| Norwich Public Utilities | Norwich Public Utilities commercial service | NPU commercial gas service classification |
Connecticut firm transportation — 3 represented gas companies
Represented companies: Southern Connecticut Gas; Yankee Gas / Eversource; Connecticut Natural Gas.
PURA describes firm transportation for commercial and industrial customers. The state’s approved gas-marketer information and the actual distribution company’s active enrollment requirements answer different questions. The town roster identifies the gas distributor separately from interstate transmission pipelines.
Cost scope: Marketer supply, utility transportation and any metering or data charges. Operating question: PURA approval, utility-active marketer and accepted start date.
Program Connecticut. Connecticut PURA: natural gas service by town.
Norwich Public Utilities: Norwich Public Utilities commercial service
Connecticut PURA lists Norwich under Norwich Public Utilities, while Groton and New London are under Yankee Gas. The municipal gas company has its own service and rates. PURA’s description of investor-owned utility marketer arrangements should not be applied to an NPU account without checking NPU’s terms.
Cost scope: Municipal gas service and supply components. Operating question: NPU commercial terms and any available supplier arrangement.
Connecticut PURA: natural gas service by town; Norwich Gas. Connecticut PURA: natural gas service by town.
Territory and program exceptions to keep visible
PURA’s town roster distinguishes Norwich Public Utilities from the investor-owned gas companies. Groton and New London are listed under Yankee Gas, so those nearby guides are not the same enrollment path. Norwich source notes.
A practical Connecticut account decision
Get the transportation rate, marketer charges and any metering conditions in writing. Keep gas and electricity procurement records separate even when a utility brand supplies both.
Record the utility’s legal service company, commercial rate code, billed unit and supply arrangement in one account row. Keep a separate row for each meter even where a supplier offers one master agreement. Normalize gas units before entering rates; compare constant supply prices and fees only after the available service and cost scope are clear.
Explore Connecticut by decision
- How to check commercial gas supplier choice
- Five practical checks before expecting gas savings
- Compare commercial gas suppliers beyond the headline rate
- Match seasonal gas usage to contract pricing
- Worked commercial gas cost examples
- How to verify gas program and tariff changes
- Reduce gas use without confusing it with rate savings
- Build a gas budget without pretending to predict prices
Connecticut city evidence
Use the city guide for community-specific source notes. Exact meter eligibility still requires utility confirmation.
Sources and review notes
- Connecticut PURA gas guidance
- Connecticut PURA: natural gas service by town
- Norwich Gas
- EIA: natural gas customer choice and eligibility
- EIA: natural gas volume, heat content and energy units
Reviewed October 16, 2026. Program information can change. Confirm the effective utility tariff, supplier availability and written offer before proceeding. Examples and planning tools are educational; they are not executable quotes or verified customer results.