Alteris' SeptiCover Program Endorsed by the National Onsite Wastewater Recycling Association (NOWRA)

Alteris, a services-oriented, complete solutions provider for the managing general agency community and a member of Argo Group International Holdings, Ltd. (NasdaqGS: AGII), has announced that its SeptiCover Program has been chosen by the National Onsite Wastewater Recycling Association (NOWRA) as the preferred errors and omissions insurance provider for its 1,800 members nationwide.

Alteris’ SeptiCover Program’s errors and omissions product is underwritten by Darwin Select Insurance Company, a member company of Allied World Assurance Company Holdings, AG. NOWRA board members have endorsed the product the based on its outstanding coverages and limit options, as well as Darwin Select’s longstanding financial rating of "A" by A.M. Best.

Designed for septic designers and inspectors, SeptiCover’s errors and omissions product fills a void in the industry by offering affordable coverage with multiple limit options. Alteris’ SeptiCover property and casualty product, designed for septic haulers and pumpers and portable sanitation operators, served as a model for the introduction of the errors and omissions product in early 2010.

"Alteris has a strong commitment to the septic industry and we designed our errors and omissions product in conjunction with Darwin and Allied World to fill a void in the marketplace,” said Alteris Vice President James Tyrrell. "The previously underserved septic designers and inspectors now have an affordable coverage option for their errors and omissions exposures. We are confident that NOWRA members will be pleased with the comprehensive coverage and accessibility of our product, and we look forward to continuing to take a leadership role in servicing the insurance needs of the wastewater industry.”

"We are pleased to recommend the SeptiCover Program errors and omissions product to our members," said NOWRA Executive Director Eric Casey. "Our Board believes NOWRA members will benefit from the tailored coverage and flexible options provided by Alteris.” Available through local brokers, the SeptiCover errors and omissions product offers septic system designers and inspectors:

• Errors and omissions coverage with limit options of $250,000, $500,000 and $1,000,000
• Retentions starting at $0
• $25,000 EPL sub-limit included (inside the limits) in most states
• Defense expenses outside the limits of errors and omissions liability
• Coverage for BI/PD resulting from professional services included
• Prior Acts Coverage available

For more information about the SeptiCover Program’s errors and omissions product, please visit www.septicover.com, or contact Patty Bethoney at 617.235.6144.

ABOUT ALTERIS

Alteris Inc., a member of Argo Group International Holdings, Ltd. (NasdaqGS: AGII), provides services-oriented, complete solutions, operating through four business divisions: Trident Insurance Services, Alteris Public Risk Solutions, Alteris Alternative Risk Solutions, and Alteris Insurance Services. Alteris offers managing general agencies and carriers access to a broad array of exclusive risk solutions for specialty programs and alternative risks including program placement, risk bearing solutions, capital support, strategic alliances, policy systems solutions, claims services, and reinsurance solutions. Information on Alteris is available at www.alterisus.com.

ABOUT ARGO GROUP INTERNATIONAL HOLDINGS, LTD.

Argo Assurances is a member of Argo Group International Holdings, Ltd. (NasdaqGS: AGII), an international underwriter of specialty insurance and reinsurance products in the property and casualty market. Argo Group offers a full line of products and services designed to meet the unique coverage and claims handling needs of businesses in four primary segments: Excess & Surplus Lines, Commercial Specialty, International Specialty and Syndicate 1200. Argo Group's insurance subsidiaries are A. M. Best-rated 'A' (Excellent) (third highest rating out of 16 rating classifications) with a stable outlook, and Argo's U.S. insurance subsidiaries are Standard and Poor's-rated 'A-' (Strong) with a stable outlook. More information on Argo Group and its subsidiaries is available at www.argolimited.com.

FORWARD-LOOKING STATEMENTS

This press release contains certain statements that are "forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, as amended. Such statements are qualified by the inherent risks and uncertainties surrounding future expectations generally and also may differ materially from actual future experience involving any one or more of such statements. For a more detailed discussion of such risks and uncertainties, see Argo Group's filings with the SEC. The inclusion of a forward-looking statement herein should not be regarded as a representation by Argo Group that Argo Group's objectives will be achieved. Argo Group undertakes no obligation to publicly update forward-looking statements, whether as a result of new information, future events or otherwise.