Utility contacts to verify before work
Investor-owned utility
Eversource Connecticut
- Service area
- Investor-owned electric service for most Connecticut municipalities and natural gas service in selected areas including Hartford, Stamford, Waterbury, and surrounding communities.
- Contractor / service coordination
- https://www.eversource.com/
- 811 / call before you dig
- https://www.cbyd.com/
Investor-owned utility
United Illuminating
- Service area
- Investor-owned electric service in the New Haven and Bridgeport coastal corridor, including Bridgeport, New Haven, East Haven, Fairfield, Hamden, and Milford areas.
- Contractor / service coordination
- https://www.uinet.com/
- 811 / call before you dig
- https://www.cbyd.com/
Gas utility
Connecticut Natural Gas
- Service area
- Natural gas utility serving central Connecticut communities including Hartford, New Britain, Greenwich, and nearby towns in its approved franchise area.
- Contractor / service coordination
- https://www.cngcorp.com/
- 811 / call before you dig
- https://www.cbyd.com/
Water utility
Regional Water Authority
- Service area
- Public water authority serving Greater New Haven communities, including New Haven, Hamden, East Haven, West Haven, Branford, and several nearby towns.
- Contractor / service coordination
- https://www.rwater.com/
- 811 / call before you dig
- https://www.cbyd.com/
Municipal utility
Norwich Public Utilities
- Service area
- Municipal electric, natural gas, water, and wastewater service for Norwich and limited regional utility services in southeastern Connecticut.
- Contractor / service coordination
- https://norwichpublicutilities.com/
- 811 / call before you dig
- https://www.cbyd.com/
When to call which utility
Use this Connecticut utility map before a job changes a meter, service mast, service drop, gas appliance, water line, trench, driveway, sewer lateral, or exterior structure. For electric outages, meter pulls, temporary power, service upgrades, underground-to-overhead changes, or a panel job that requires a utility disconnect, start with the electric utility assigned to the address: Eversource Connecticut, United Illuminating and Norwich Public Utilities. Rural addresses often sit in cooperative territory even when the nearest city is served by an investor-owned or municipal utility, so verify the premise before an electrician schedules the cutover. For natural-gas odors, hit lines, meter relocations, pressure questions, or appliance conversions, stop work and call the gas utility or 911 from a safe distance when there is an immediate leak; use Connecticut Natural Gas for the listed gas distribution territory. Water utilities such as Regional Water Authority coordinate taps, meters, backflow requirements, main shutoffs, hydrant use, and service-line ownership questions. Municipal utilities may bundle electric, gas, water, wastewater, and stormwater, so one counter can control several approvals. Before any excavation, boring, fence post, sign, tree planting, drainage, sewer, or water-service work, file the 811 ticket through https://www.cbyd.com/ and wait for marks or positive response. The utility marks public facilities; the contractor still needs private locating for owner-installed lighting, irrigation, propane, septic, yard drains, and lines beyond the meter.
811 comes before utility-side work
File a locate request before trenching, boring, planting, fencing, drainage work, sewer work, or water-service changes. Utility marks do not replace private locating on owner-installed lines.
Source: ProFix Editorial Team. Last updated 2026-06-09. Utility territories can change at parcel boundaries; verify the premise address with the utility and local 811 system before scheduling work.