RUTLAND, VT -- (Marketwire) -- 09/24/12 -- Casella Waste Systems, Inc. (NASDAQ: CWST) today announced that it has commenced an underwritten public offering of its Class A common stock. Casella Waste Systems intends to sell up to 10,000,000 shares of its Class A common stock and to grant the underwriters a 30-day option to purchase up to an additional 1,500,000 shares of Class A common stock sold in the offering to cover over-allotments, if any. All of the shares in the offering are to be sold by Casella Waste Systems. The offering is subject to market and other conditions, and there can be no assurance as to whether or when the offering may be completed, or as to the actual size or terms of the offering.

BofA Merrill Lynch and J.P. Morgan are acting as joint book-running managers for the offering.

A shelf registration statement on Form S-3 relating to the public offering of the shares of Class A common stock described above was filed with the Securities and Exchange Commission (SEC) and is effective. A preliminary prospectus supplement relating to the offering has been filed with the SEC and is available on the SEC's website located at www.sec.gov. Copies of the preliminary prospectus supplement and accompanying prospectus may be obtained from BofA Merrill Lynch, 222 Broadway, 7th Floor, New York, New York 10038, Attention: Prospectus Department or email dg.prospectus_requests@baml.com or J.P. Morgan Securities LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York, 11717, telephone: (866) 803-9204.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy these securities, nor shall there be any sale of these securities in any state or other jurisdiction in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such state or other jurisdiction.

About Casella Waste Systems, Inc.

Casella Waste Systems, Inc., headquartered in Rutland, Vermont, provides solid waste management services consisting of collection, transfer, disposal, and recycling services in the northeastern United States. For further information, investors should contact Ned Coletta, vice president of finance and investor relations at (802) 772-2239, and media should contact Joseph Fusco, vice president at (802) 772-2247.

Forward-looking Statements

Certain of the statements made in this press release are forward looking, such as those, among others, relating to our expectations regarding the completion of the proposed public offering. Actual results or developments may differ materially from those projected or implied in these forward-looking statements. Factors that may cause such a difference include, without limitation, risks and uncertainties related to whether or not we will be able to raise capital through the sale of shares of Class A common stock, the final terms of the proposed offering, market and other conditions, the satisfaction of customary closing conditions related to the proposed public offering and the impact of general economic, industry or political conditions in the United States or internationally. There can be no assurance that we will be able to complete the proposed public offering on the anticipated terms, or at all. Additional risks and uncertainties relating to the proposed offering, Casella Waste Systems and our business are discussed in the preliminary prospectus supplement related to the proposed offering filed with the SEC on or about the date hereof and in other filings that we periodically make with the SEC. In addition, the forward-looking statements included in this press release represent our views as of the date of this press release. We anticipate that subsequent events and developments will cause our views to change. However, while we may elect to update these forward-looking statements at some point in the future, we specifically disclaim any obligation to do so. These forward-looking statements should not be relied upon as representing our views as of any date subsequent to the date of this press release.

Investors:

Ned Coletta

Vice President of Finance and Investor Relations

(802) 772-2239



Media:

Joseph Fusco

Vice President

(802) 772-2247

Source: Casella Waste Systems, Inc

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