Exhibit 99.1

FOR IMMEDIATE RELEASE

Suburban Propane Partners, L.P. Announces

Second Quarter Results

Whippany, New Jersey, May 3, 2012 — Suburban Propane Partners, L.P. (NYSE:SPH), a nationwide distributor of propane, fuel oil and related products and services, as well as a marketer of natural gas and electricity, today announced earnings for its second quarter ended March 24, 2012. Net income amounted to $49.6 million, or $1.39 per Common Unit, compared to $100.3 million, or $2.82 per Common Unit, in the prior year second quarter. Earnings before interest, taxes, depreciation and amortization (“EBITDA”) for the second quarter of fiscal 2012 amounted to $63.3 million, compared to $115.7 million in the prior year second quarter.

Net income and EBITDA for the fiscal 2012 second quarter included a $2.1 million non-cash charge from a loss on disposal of an asset in the Partnership’s natural gas and electricity business, as well as a $0.5 million loss on debt extinguishment associated with the previously announced amended and restated credit agreement completed in January 2012. Net income and EBITDA for the fiscal 2011 second quarter included a $2.0 million charge for severance costs associated with the realignment of the Partnership’s field operations initiated during that quarter. Excluding the effects of these charges for the fiscal 2012 and 2011 second quarters, as well as the unrealized (non-cash) mark-to-market adjustments on derivative instruments used in risk management activities in both quarters, Adjusted EBITDA amounted to $65.9 million for the fiscal 2012 second quarter, compared to Adjusted EBITDA of $113.6 million in the prior year second quarter.

In announcing these results, President and Chief Executive Officer Michael J. Dunn, Jr., said, “Our results for the second quarter of fiscal 2012 reflect the impact on sales volumes from record warm temperatures throughout most of the country during the three-month period from January to March 2012, which has been reported as the warmest on record, capped off by the warmest March on record in the contiguous United States. The lack of cold weather in this year’s heating season has clearly presented additional challenges for the industry, beyond the impact of customer conservation, high commodity prices and the economy. While we cannot control the weather, the strength of our balance sheet and cash position continues to provide us with adequate liquidity to withstand the negative impact on operating cash flow from the lower volumes. We continued to fund all of our working capital requirements without the need to borrow under our revolving credit facility and we ended the quarter with over $96 million of cash on hand.”

Mr. Dunn added, “Our field personnel remain focused on delivering the highest quality customer service to our existing customers while, at the same time, pursuing initiatives to grow our customer base. In addition, we continue to pursue opportunities to drive efficiencies and streamline our cost structure.”

Mr. Dunn concluded, “With the recent announcement of our agreement to acquire the retail propane operations of Inergy, L.P., we are working toward refining a detailed integration plan to begin implementing immediately upon closing of the acquisition, which is subject to certain government approvals and is expected to occur in our fiscal 2012 fourth quarter. We look forward to welcoming the employees of Inergy Propane as we work together to combine the best practices of both companies, leveraging our investments in people and technology across the expanded geography and customer base, creating growth opportunities for our employees and our unitholders.”

Retail propane gallons sold in the second quarter of fiscal 2012 decreased approximately 24.1 million gallons, or 21.1%, to 89.9 million gallons compared to 114.0 million gallons in the prior year second quarter. Sales of fuel oil and other refined fuels decreased approximately 5.6 million gallons, or 34.6%, to 10.6 million gallons during the second quarter of fiscal 2012 compared to 16.2 million gallons in the prior year second quarter. The most significant factor impacting volumes in both segments during the second quarter of fiscal 2012 was the record warm weather throughout the quarter, which added to the effects of an unseasonably warm first quarter of fiscal 2012, across the Partnership’s service territories. The fiscal 2012 second quarter was the warmest on record for the contiguous United States, according to the National Oceanic and Atmospheric Administration, which has been keeping records since 1895. Average temperatures (as measured by heating degree days) across all of the Partnership’s service territories for the second quarter of fiscal 2012 were 16% warmer than normal and 17% warmer than the prior year second quarter. In the Partnership’s northeast and southeast service areas, average temperatures for the second quarter of fiscal 2012 were 23% and 25% warmer, respectively, when compared to the prior year second quarter.

Revenues of $357.6 million decreased $106.5 million, or 22.9%, compared to the prior year second quarter, primarily due to lower volumes sold and, to a lesser extent, lower average selling prices in the propane segment attributable to lower wholesale propane costs. Although average posted prices for propane during the fiscal 2012 second quarter were 9.8% lower compared to the prior year second quarter, commodity prices have remained high relative to historical levels. Average posted prices for fuel oil were 12.3% higher compared to the prior year second quarter.

Cost of products sold for the second quarter of fiscal 2012 of $208.4 million decreased $51.4 million, or 19.8%, compared to $259.8 million in the prior year second quarter. Cost of products sold in the prior year second quarter included a $4.1 million unrealized (non-cash) gain attributable to the mark-to-market adjustment for derivative instruments used in risk management activities which is excluded from Adjusted EBITDA in the table below. The mark-to-market adjustment for the fiscal 2012 second quarter was de minimis.

Combined operating and general and administrative expenses of $85.5 million for the second quarter of fiscal 2012 were $1.1 million, or 1.3%, lower than the prior year second quarter, primarily due to continued savings in payroll and benefit related expenses and lower variable compensation attributable to lower earnings.

Once again, the Partnership funded all working capital requirements with cash on hand without the need to borrow under its working capital facility and ended the second quarter of fiscal 2012 with approximately $96 million of cash. On April 19, 2012, the Partnership announced that its Board of Supervisors had declared a quarterly distribution of $0.8525 per Common Unit for the three months ended March 24, 2012. On an annualized basis, this distribution rate equates to $3.41 per Common Unit. The $0.8525 per Common Unit distribution will be paid on May 8, 2012 to Common Unitholders of record as of May 1, 2012.

Suburban Propane Partners, L.P. is a publicly-traded master limited partnership listed on the New York Stock Exchange. Headquartered in Whippany, New Jersey, Suburban has been in the customer service business since 1928. The Partnership serves the energy needs of approximately 750,000 residential, commercial, industrial and agricultural customers through more than 300 locations in 30 states.

This press release contains certain forward-looking statements relating to future business expectations and financial condition and results of operations of the Partnership, based on management’s current good faith expectations and beliefs concerning future developments. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from those discussed or implied in such forward-looking statements, including the following:

Some of these risks and uncertainties are discussed in more detail in the Partnership’s Annual Report on Form 10-K for its fiscal year ended September 24, 2011 and other periodic reports filed with the SEC. Readers are cautioned not to place undue reliance on forward-looking statements, which reflect management’s view only as of the date made. The Partnership undertakes no obligation to update any forward-looking statement, except as otherwise required by law.

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Suburban Propane Partners, L.P. and Subsidiaries

Consolidated Statements of Operations

For the Three and Six Months Ended March 24, 2012 and March 26, 2011

(in thousands, except per unit amounts)

(unaudited)

(more)

In addition, certain of our incentive compensation plans covering executives and other employees utilize Adjusted EBITDA as the performance target. Moreover, our revolving credit agreement requires us to use Adjusted EBITDA as a component in calculating our leverage and interest coverage ratios. EBITDA and Adjusted EBITDA are not recognized terms under accounting principles generally accepted in the United States of America (“US GAAP”) and should not be considered as an alternative to net income or net cash provided by operating activities determined in accordance with US GAAP. Because EBITDA and Adjusted EBITDA as determined by us excludes some, but not all, items that affect net income, they may not be comparable to EBITDA and Adjusted EBITDA or similarly titled measures used by other companies.

The following table sets forth (i) our calculations of EBITDA and Adjusted EBITDA and (ii) a reconciliation of Adjusted EBITDA, as so calculated, to our net cash provided by operating activities:

The unaudited financial information included in this document is intended only as a summary provided for your convenience, and should be read in conjunction with the complete consolidated financial statements of the Partnership (including the Notes thereto, which set forth important information) contained in its Quarterly Report on Form 10-Q to be filed by the Partnership with the United States Securities and Exchange Commission (“SEC”). Such report, once filed, will be available on the public EDGAR electronic filing system maintained by the SEC.