PUBLIC SERVICE CO OF NEW HAMPSHIRE

ElectricDistribution · ElectricTransmission

Number of substations owned · 458 · 77

Transformer capacity (in kVa) · 48,310,570 · 16,312,600

Overhead lines (in circuit miles) · 40,650 · 4,007

Underground lines (in circuit miles) · 19,220 · 460

Capacity range of overhead transmission lines (in kV) · N/A · 69 to 345

Capacity range of underground transmission lines (in kV) · N/A · 69 to 345

CL&P · NSTAR Electric · PSNH

Distribution · Transmission · Distribution · Transmission · Distribution · Transmission

Number of substations owned · 157 · 22 · 175 · 30 · 126 · 25

Transformer capacity (in kVa) · 21,973,500 · 3,184,000 · 21,607,370 · 8,688,000 · 4,729,700 · 4,440,600

Overhead lines (in circuit miles) · 16,749 · 1,684 · 11,515 · 1,272 · 12,386 · 1,051

Underground lines (in circuit miles) · 6,989 · 158 · 10,052 · 299 · 2,179 · 3

Capacity range of overhead transmission lines (in kV) · N/A · 69 to 345 · N/A · 69 to 345 · N/A · 115 to 345

Capacity range of underground transmission lines (in kV) · N/A · 69 to 345 · N/A · 115 to 345 · N/A · 115

Underground and overhead line transformers in service · 654,639 · 295,913 · 185,043 · 173,683

Aggregate capacity (in kVa) · 40,274,114 · 17,201,091 · 15,427,848 · 7,645,175

Electric Generating Plants

As of December 31, 2025, NSTAR Electric owned the following solar power facilities:

Type of Plant · Numberof Sites · YearInstalled · Capacity(kilowatts, dc)

Solar Fixed Tilt, Photovoltaic · 22 · 2010 - 2019 · 70,000

CL&P and PSNH do not own any electric generating plants.

Natural Gas Distribution System

As of December 31, 2025, NSTAR Gas owned 21 active gate stations, 162 district regulator stations, and approximately 3,332 miles of natural gas main pipeline. Hopkinton, another subsidiary of Eversource, owns a satellite vaporization plant and above ground storage tanks in Acushnet, Massachusetts (0.5 Bcf of natural gas). In addition, Hopkinton owns a liquefaction and vaporization plant with above ground storage tanks in Hopkinton, Massachusetts (3.0 Bcf of natural gas). Combined, the two plants' tanks have an aggregate storage capacity equivalent to 3.5 Bcf of natural gas that is provided to NSTAR Gas under contract.

As of December 31, 2025, EGMA owned 15 active gate stations, 168 district regulator stations, and approximately 5,040 miles of natural gas main pipeline. Hopkinton, another subsidiary of Eversource, owns liquefaction and vaporization plants and above ground storage tanks at four locations throughout Massachusetts with an aggregate storage capacity equivalent to 1.8 Bcf of natural gas. In addition, Hopkinton owns three propane peak shaving plants at three locations throughout Massachusetts with an aggregate storage capacity equivalent to 0.1 Bcf. Combined, these seven plants have an aggregate storage capacity equivalent to 1.9 Bcf of natural gas that is provided to EGMA under contract.

As of December 31, 2025, Yankee Gas owned 28 active gate stations, 189 district regulator stations, and approximately 3,526 miles of natural gas main pipeline. Yankee Gas also owns a liquefaction and vaporization plant and above ground storage tank with a storage capacity equivalent of 1.2 Bcf of natural gas in Waterbury, Connecticut.

Natural Gas Transmission System

As of December 31, 2025, NSTAR Gas owned 0.65 miles of intrastate transmission natural gas pipeline.

Water Distribution System

Aquarion’s properties consist of water transmission and distribution mains and associated valves, hydrants and service lines, water treatment plants, pumping facilities, wells, tanks, meters, dams, reservoirs, buildings, and other facilities and equipment used for the operation of our systems, including the collection, treatment, storage, and distribution of water.

As of December 31, 2025, Aquarion owned and operated sources of water supply with a combined yield of approximately 135 million gallons per day; 3,861 miles of transmission and distribution mains; 10 surface water treatment plants; 37 dams; and 119 wellfields.

Franchises

CL&P Subject to the power of alteration, amendment or repeal by the General Assembly of Connecticut and subject to certain approvals, permits and consents of public authority and others prescribed by statute, CL&P has, subject to certain exceptions not deemed material, valid franchises free from burdensome restrictions to provide electric transmission and distribution services in the respective areas in which it is now supplying such service.

In addition to the right to provide electric transmission and distribution services as set forth above, the franchises of CL&P include, among others, limited rights and powers, as set forth under Connecticut law and the special acts of the General Assembly constituting its charter, to manufacture, generate, purchase and/or sell electricity at retail, including to provide Standard Service, Supplier of Last Resort service and backup service, to sell electricity at wholesale and to erect and maintain certain facilities on public highways and grounds, all subject to such consents and approvals of public authority and others as may be required by law. The franchises of CL&P include the power of eminent domain. Connecticut law prohibits an electric distribution company from owning or operating generation assets. However, under "An Act Concerning Electricity and Energy Efficiency," enacted in 2007, an electric distribution company, such as CL&P, is permitted to purchase an existing electric generating plant located in Connecticut that is offered for sale, subject to prior approval from PURA and a determination by PURA that such purchase is in the public interest.

• Adequacy of water supplies and contamination of our water supplies, the failure of dams on reservoirs providing water to our customers, or requirements to repair, upgrade or dismantle any of these dams, may disrupt our ability to distribute water to our customers and result in substantial additional costs, which could adversely affect our financial position, results of operations, and cash flows.
• Physical attacks, including acts of war or terrorism, both threatened and actual, could adversely affect our ability to operate our systems and could adversely affect our financial results and liquidity.
• Strategic development or investment opportunities in electric transmission, distributed generation, or clean-energy technologies may not be successful, which could have a material adverse effect on our business prospects.
• Our transmission and distribution systems may not operate as expected, and could require unplanned expenditures, which could adversely affect our financial position, results of operations, and cash flows.
• New technology and alternative energy sources could adversely affect our operations and financial results.
• We rely on third-party suppliers for equipment, materials, and services and we outsource certain business functions to third-party suppliers and service providers, and substandard performance or inability to fulfill obligations by those third parties could harm our business, reputation and results of operations.
• The loss of key personnel, the inability to hire and retain qualified employees, or the failure to maintain a positive relationship with our workforce could have an adverse effect on our business, financial position and results of operations.
• Limits on our access to, or increases in, the cost of capital may adversely impact our ability to execute our business plan.
• Market performance or changes in assumptions may require us to make significant contributions to our pension and other postretirement benefit plans.
• Goodwill and long-lived assets if impaired and written down, could adversely affect our future operating results and total capitalization.
• Our counterparties may not meet their obligations to us or may elect to exercise their termination rights, which could adversely affect our earnings.
• As a holding company with no revenue-generating operations, Eversource parent's liquidity is dependent on dividends from its subsidiaries, its commercial paper program, and its ability to access the long-term debt and equity capital markets.