Exhibit 99.1

FOR IMMEDIATE RELEASE

TECO ENERGY REPORTS THIRD-QUARTER RESULTS

Company maintains 2015 earnings-per-share guidance range

TAMPA, Fla. (Nov. 5, 2015) — TECO Energy, Inc. (NYSE:TE) today reported third-quarter non-GAAP results from continuing operations, which exclude $12.4 million of acquisition-related costs, of $77.3 million, or $0.33 on a per-share basis, compared with $73.9 million, or $0.32 on a per-share basis in 2014.

Third-quarter 2015 net income was $53.2 million, or $0.23 per share, compared with $11.1 million, or $0.04 per share, in the third quarter of 2014. Net income from continuing operations was $64.9 million, or $0.28 per share, in the 2015 third quarter, compared with $73.0 million, or $0.32 per share, for the same period in 2014. The third quarter loss in discontinued operations of $11.7 million and $61.9 million in 2015 and 2014, respectively, reflects the operating results and charges associated with TECO Coal, which was sold on Sept. 21.

Year-to-date non-GAAP results from continuing operations, which exclude $13.4 million of acquisition-related costs, were $203.6 million, or $0.87 on a per-share basis, compared with $184.7 million, or $0.84 on a per-share basis in 2014.

Year-to-date net income was $123.0 million, or $0.53 per share, compared with net income of $119.6 million, or $0.54 per share in the 2014 period. Net income from continuing operations was $190.2 million or $0.81 per share, compared with $179.0 million or $0.81 per share in the 2014 period. The year-to-date losses from discontinued operations were $67.2 million and $59.4 million in 2015 and 2014, respectively.

TECO Energy President and Chief Executive Officer John Ramil said, “This has been a momentous quarter for TECO Energy marked by significant changes. On Sept. 4, we announced that Emera, Inc. would acquire TECO Energy for $27.55 per share. On Sept. 21, we closed the sale of TECO Coal, our last unregulated business, thus completing our transformation to a regulated utility business. At the same time, our operating companies have delivered impressive results. Our Florida utilities have achieved year-to-date net income growth of almost 6%, and we are well positioned for New Mexico Gas to be accretive this year.”

Non-GAAP Results

Non-GAAP results in the third quarter and year-to-date periods of 2015 and 2014 exclude costs related to the pending acquisition by Emera, and costs associated with the integration and acquisition of New Mexico Gas Co. (NMGC). The table below compares the TECO Energy GAAP net income with the non-GAAP measures used in this release. Non-GAAP results exclude charges and gains contained in the Results Reconciliation table later in this release. See the Non-GAAP Presentation section and Results Reconciliation table later in this release for reconciliation to GAAP results and a discussion regarding this presentation of non-GAAP results and management’s use of this information.

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All amounts included in the non-GAAP discussion below are after tax, unless otherwise noted.

Segment Reporting

The table below includes TECO Energy segment information on a GAAP basis, which includes all charges and gains for the periods shown.

Segment Information

All amounts included in the operating company discussions below are after tax, unless otherwise noted.

Tampa Electric

Tampa Electric’s net income for the third quarter of 2015 was $82.1 million, compared with $79.7 million for the same period in 2014. Results for the quarter reflected a 1.8% higher average number of customers partially offset by slightly lower energy sales primarily due to rainy summer weather. Results reflected operations and maintenance expense virtually unchanged from 2014 and higher depreciation expense. Third-quarter net income in 2015 included $4.6 million of Allowance for Funds Used During Construction (AFUDC) equity, which represents allowed equity cost capitalized to construction costs, compared with $2.9 million in the 2014 quarter.

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Total degree days in Tampa Electric’s service area in the third quarter of 2015 were 1% above normal, and 2% above the 2014 period. Rainfall, which reduces energy sales, in the Tampa area in the third quarter was 60% above normal. Total net energy for load, which is a calendar measurement of retail energy sales rather than a billing-cycle measurement, decreased 0.3% in the third quarter of 2015, compared with the same period in 2014. In the 2015 period, pretax base revenues were more than $1 million higher than in 2014, driven by customer growth and almost $2 million of higher pretax base revenue from the $7.5 million of higher base rates effective Nov. 1, 2014, as a result of the 2013 rate case settlement, partially offset by lower energy sales. (The quarterly energy sales shown on the statistical summary that accompanies this earnings release reflect the energy sales based on the timing of billing cycles, which can vary period to period.) Retail energy sales to residential and commercial customers decreased primarily from rainy weather partially offset by customer growth. Sales to non-phosphate industrial customers increased due to the strength of the Tampa area economy. Sales to lower-margin industrial-phosphate customers decreased as self-generation by those customers increased.

Operations and maintenance expense, excluding all Florida Public Service Commission (FPSC)-approved cost-recovery clauses, was essentially unchanged from the 2014 quarter, reflecting $5.1 million of higher costs to safely and reliably operate and maintain the generating, transmission and distribution systems, offset by lower employee-related costs, primarily due to the timing of short-term incentive accruals for all employees in 2015 compared to 2014. Depreciation and amortization expense increased $1.7 million in 2015, as a result of normal additions to facilities to reliably serve customers.

Year-to-date net income was $198.0 million, compared with $187.1 million in the 2014 period, driven by 1.8% higher average number of customers, higher energy sales from customer growth, more favorable weather and a stronger economy, partially offset by higher operations and maintenance and depreciation expenses. Year-to-date net income in 2015 included $12.1 million of AFUDC equity, compared with $7.3 million in the 2014 period.

Year-to-date total degree days in Tampa Electric’s service area were 7% above normal and 10% above the prior year-to-date period. Pretax base revenue was almost $22 million higher than in 2014, including approximately $5 million of higher pretax base revenue as a result of the Nov. 1, 2014, base rate increase. In the 2015 year-to-date period, total net energy for load was 2.5% higher than the same period in 2014. Higher energy sales were driven by hotter than normal 2015 spring weather, and winter weather that was colder than in 2014.

Operations and maintenance expenses, excluding all FPSC-approved cost-recovery clauses, increased $4.7 million in the 2015 year-to-date period reflecting approximately $8.0 million of higher costs to safely and reliably serve customers partially offset by lower employee-related expenses. Compared to the 2014 year-to-date period, depreciation and amortization expense increased $3.6 million, reflecting additions to facilities to serve customers. Interest expense increased $1.3 million due to higher long-term debt balances.

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Peoples Gas

Peoples Gas System (PGS) reported net income of $6.2 million for the third quarter, compared with $4.8 million in the 2014 quarter. Average customer growth was 2.0% in the quarter, and therm sales to retail customers increased as a result of customer growth and a stronger economy. Third-quarter results in 2015 reflected non-fuel operations and maintenance expense $1.0 million lower than in the 2014 period, driven by lower employee-related costs, primarily due to the timing of short-term incentive accruals for all employees in 2015 compared to 2014. Depreciation and amortization increased slightly due to normal additions to facilities to serve customers. Sales to power-generation customers and off-system sales increased due to coal-to-gas switching by customers and new gas-fired generation in the state.

PGS reported net income of $28.4 million for the year-to-date period, compared with $26.9 million in the 2014 year-to-date period. Results reflect a 2.1% higher average number of customers, lower therm sales to residential customers due to warmer than normal spring weather, and increased commercial therm sales due to strong economic conditions in Florida. Sales to power generation customers and off-system sales increased due to the same reasons as in the third quarter. Non-fuel operations and maintenance expense decreased $0.5 million compared to the 2014 period, driven by lower general operating costs. Operations and maintenance expense in 2014 reflected a first-quarter recovery of $1.6 million of costs incurred in connection with a 2010 outage incident.

NMGC

NMGC reported a third-quarter loss of $2.8 million, which was less than historical third-quarter loss patterns. Results reflected the benefit of 0.8% customer growth, and lower operating and maintenance expenses from acquisition synergies and a focus on cost control. Results in 2014 reflected the loss in the first month of ownership, September, following the closing of the acquisition.

NMGC reported year-to-date 2015 net income of $11.0 million. Results reflected customer growth of 0.7%, much milder than normal winter weather in the first quarter, and degree days 6.7% below normal and 1.4% below 2014. Operations and maintenance expense was lower than in the 2014 period from acquisition synergies and a focus on cost control. Results included $1.4 million of pretax rate credits to customers under the Certification of Stipulation approved by the New Mexico Public Regulation Commission.

Other - net

The third quarter 2015 non-GAAP cost from continuing operations for Other – net of $8.2 million excluded $12.2 million of transaction costs related to the pending Emera acquisition and $0.2 million of costs associated with the integration of NMGC, compared with the non-GAAP cost of $9.7 million in 2014, which excluded $0.9 million of NMGC-related costs. Although third-quarter results in 2015 reflected $1.1 million of interest expense at New Mexico Gas Intermediate (NMGI), the parent company of NMGC, and $1.0 million of interest expense previously allocated to TECO Coal, this was more than offset by lower interest expense as a result of refinancing debt maturities in May. The cost from continuing operations for Other – net in the third quarter of 2015 was $20.6 million, compared with a cost of $10.6 million in the same period in 2014.

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The 2015 year-to-date non-GAAP cost from continuing operations for Other – net was $33.8 million, which excluded the third quarter transaction costs related to the pending Emera acquisition and $1.2 million of NMGC integration-related costs, compared with $28.4 million in 2014, which excluded $5.7 million of NMGC acquisition-related costs. Cost drivers in the 2015 year-to-date period included $3.3 million of interest at NMGI, $3.0 million of interest previously allocated to TECO Coal that was offset by lower interest expense, and a $2.6 million tax expense related to long-term incentive compensation shares that vested below target levels. The 2015 year-to-date Other – net cost from continuing operations was $47.2 million, compared with $34.1 million in the 2014 period.

Discontinued Operations

The sale of TECO Coal closed on Sept. 21. The third quarter 2015 loss of $11.7 million recorded in discontinued operations reflects TECO Coal’s operating results prior to its sale and a previously disclosed $7.7 million charge related to black lung liabilities.

The year-to-date loss of $67.2 million in discontinued operations reflects TECO Coal’s operating loss, net impairment charges of $50.8 million recorded in the second quarter and the third-quarter black-lung related charge.

Maintaining 2015 Guidance from Continuing Operations

TECO Energy continues to expect to deliver consolidated non-GAAP earnings-per-share from continuing operations in a range between $1.08 and $1.11 in 2015. TECO Energy expects earnings in 2015 to be driven by the factors discussed when guidance was initially provided in early 2015.

Preliminary 2016 Business Drivers

Results in 2016 are expected to be driven by customer growth trends for all three utilities at or above the trends experienced in 2015. Tampa Electric and PGS are expected to continue to earn toward the upper end of their allowed Return on Equity ranges of 9.25% to 11.25% and 9.75% to 11.75%, respectively. Depreciation expense at all three utilities is expected to increase from normal additions to facilities to safely and reliably serve customers. Tampa Electric expects higher AFUDC-equity earnings from the growing investment in the Polk Power Station conversion project.

Non-GAAP Presentation

Management believes it is helpful to present a non-GAAP measure of performance that reflects the ongoing operations of TECO Energy’s businesses and that allows investors to better understand and evaluate the business as it is expected to operate in future periods.

Management and the board of directors use non-GAAP measures as a tool for measuring the company’s performance, for making decisions that are dependent upon the profitability of the company’s various operating units, and for determining levels of incentive compensation.

The non-GAAP measures of financial performance used by the company are not measures of performance under accounting principles generally accepted in the United States and should not be considered an alternative to net income or other GAAP figures as an indicator of the company’s financial performance or liquidity. TECO Energy’s non-GAAP presentation of net income may not be comparable to similarly titled measures used by other companies.

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The Results Reconciliation table below presents non-GAAP financial results after eliminating the effects of identified charges and gains. This provides investors additional information to assess the company’s results and future earnings potential.

Results Reconciliation

Webcast

As previously announced, TECO Energy will host a webcast with the investment community to discuss its quarterly results and outlook for the remainder of 2015 at 9:00 a.m. Eastern time today. The webcast will be accessible through a link on TECO Energy’s website: www.tecoenergy.com. The webcast and accompanying slides will be available for replay for 30 days through the website, beginning approximately two hours after the conclusion of the live event.

TECO Energy Inc. (NYSE: TE) is an energy-related holding company with regulated electric and gas utilities in Florida and New Mexico. Tampa Electric serves more than 715,000 customers in West Central Florida; Peoples Gas System serves more than 360,000 customers across Florida; and New Mexico Gas Co. serves more than 515,000 customers across New Mexico.

Note: This press release contains forward-looking statements, which are subject to the inherent uncertainties in predicting future results and conditions. Actual results may differ materially from those forecasted. The forecasted results are based on the company’s current expectations and assumptions, and the company does not undertake to update that information or any other information contained in this press release, except as may be required by law. Factors that could impact actual results include: regulatory actions by

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federal, state or local authorities; the ability to successfully implement the integration plans for NMGC and generate the financial results to make that acquisition accretive; unexpected capital needs or unanticipated reductions in cash flow that affect liquidity; the ability to access the capital and credit markets when required; general economic conditions affecting customer growth and energy sales at the utility companies; economic conditions affecting the Florida and New Mexico economies; weather variations and customer energy usage patterns affecting sales and operating costs at the utilities and the effect of weather conditions on energy consumption; the effect of extreme weather conditions or hurricanes; general operating conditions; input commodity prices affecting cost at all of the operating companies; natural gas demand at the utilities; and the ability of TECO Energy’s subsidiaries to operate equipment without undue accidents, breakdowns or failures. Additional information is contained under “Risk Factors” in TECO Energy, Inc.’s Annual Report on Form 10-K for the period ended Dec. 31, 2014 and as updated in subsequent SEC filings.

Summary Information (as of Sept. 30)

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SEPTEMBER 2015

Figures appearing in these statements are presented as general information and not in connection with any sale or offer to sell or solicitation of an offer to buy any securities, nor are they intended as a representation by the company of the value of its securities. All figures reported are subject to adjustments as the annual audit by independent accountants may determine to be necessary and to the explanatory notes affecting income and balance sheet accounts contained in the company’s Annual Report on Form 10-K. Reference should also be made to information contained in that and other reports filed by TECO Energy, Inc. and Tampa Electric Company with the Securities and Exchange Commission.

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TECO ENERGY, Inc.

CONSOLIDATED STATEMENTS OF INCOME (Unaudited)

(All significant intercompany transactions have been eliminated in the consolidated financial statements.)

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TECO ENERGY, Inc.

CONSOLIDATED BALANCE SHEETS (Unaudited)

(All significant intercompany transactions have been eliminated in the consolidated financial statements.)

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TECO ENERGY, Inc.

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

(All significant intercompany transactions have been eliminated in the consolidated financial statements.)

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TECO ENERGY, Inc.

SEGMENT INFORMATION (Unaudited)