Zefiro Awarded US$11.5 Million State-Funded Well Plugging Contract Through June 2029

Engagement builds on growing state-funded remediation backlog; Work set to begin November 2026, addressing unplugged wells in the Great Lakes area of the northeastern United States

Bradford, Pennsylvania–(Newsfile Corp. – September 8, 2026) – Zefiro Methane Corp. (Cboe Canada: ZEFI) (FSE: Y6B) (OTCQB: ZEFIF) (the “Company”, “Zefiro”, or “ZEFI”), a North American environmental services company specializing in methane abatement and the plugging of orphaned and end-of-life oil and gas wells, is pleased to announce that it has been awarded a US$11.5 million well-plugging services contract by an environmental protection department for a state in the Great Lakes region, for services to be performed between November 2026 and June 2029.

Per the terms of the grant funding the well-plugging contract, a fixed portion of approximately US$3 million must be fully spent between November 2026 and June 30, 2027. The remaining balance of USD $8.5 million is then expected to be spent between July 2027 and June 2029.

Over the course of 2026, Zefiro has strategically assembled a robust portfolio of environmental remediation projects in key markets across the United States. These markets include Zefiro’s established operating territory primarily in the northeastern U.S., in addition to regions that have been newly added by way of equipment acquisitions and Zefiro’s strategic partnership with the Well Done Foundation, expanding capabilities in several additional states.

This announcement follows a June 2025 contract award for a three-year US$19.6 million Construction Manager at Risk contract by the Ohio Department of Natural Resources to perform remediation work on approximately 200 high-priority marginal wells, alongside a steady flow of plugging contracts from accounts in both the private and public sectors.

Caption: Zefiro Recently Secured a Three-Year Contract to Plug Wells for a State Agency in the Great Lakes Area. Crew Members are Pictured Above Performing Remediation Work on a Well in this Region.

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Zefiro Chief Executive Officer Catherine Flax commented: “We are pleased to announce the addition of this three-year contract award to our growing backlog, reflecting our market leadership position in many regions where we operate. Having recently expanded our equipment fleet and crews to address a widening opportunity set, Zefiro is better positioned than ever to capitalize on these large-scale contracts, as bipartisan federal funding continues and private sector demand remains strong.”

“In addition to providing a more predictable revenue base, these multi-year contracts enable us to strategically allocate our rigs and team members to optimize utilization, increase margins and identify opportunities to supplement our capabilities as needed. We look forward to working on this contract as part of Zefiro’s continued efforts to plug oil and gas wells across America, which we believe positions us well to drive sustainable shareholder value creation over the long-term.”

About Zefiro Methane Corp.

Zefiro Methane Corp. (Cboe Canada: ZEFI) (FSE: Y6B) (OTCQB: ZEFIF) is a North American environmental services company specializing in methane abatement and the plugging of orphaned and end-of-life oil and gas wells. Through operating subsidiary Plants & Goodwin, Inc., a third-generation well services company with a 50-plus-year operating history, Zefiro is vertically integrated across the well lifecycle – measurement and monitoring, plugging and abandonment, site restoration, and carbon credit origination – serving government and private-sector customers across 13 U.S. states. For more information, visit zefiroglobal.com.

Notice Regarding References to Zefiro Entities

In this press release, the standalone name/term “Zefiro” collectively refers to both (i) Zefiro Methane Corp. (incorporated in the province of British Columbia, Canada) and (ii) Subsidiaries of Zefiro Methane Corp. unless explicitly stated or otherwise implied by the context. Likewise, first-person linguistic mechanisms such as “We”, “Our”, and “Us” also collectively refer to Zefiro Methane Corp. and its subsidiaries unless explicitly stated or otherwise implied by the context.

For instances in which a precise entity must be identified, the exact legal name of the entity in question will generally be stated (e.g., “Zefiro Methane Corp.” would refer to this entity only and not any of its subsidiaries).

This convention is used only for convenience to facilitate simple and plain-language disclosures to investors, and a comprehensive overview of Zefiro Methane Corp.’s subsidiaries that are collectively referred to with the “Zefiro” name/term can be found in the Company’s most recent MD&A, which can be accessed on SEDAR+ at www.sedarplus.ca/.

Forward-Looking Statements

This news release may contain forward-looking statements within the meaning of applicable securities laws, including U.S. and Canadian securities regulations and laws. These forward-looking statements are based on current expectations, estimates, projections, beliefs, and assumptions of management, including those of Zefiro Methane Corp., as of the date of this news release. Forward-looking statements typically include words such as “anticipates,” “outlook”, “seeks”, “expects,” “intends,” “plans,” “believes,” “estimates,” “may,” “will,” “should,” “could,” “would,” “continue,” “forecast,” “potential,” “targets,” “goals,” “vision,” “strategy,” and similar expressions or variations thereof. These statements may relate to, among other things, the Company’s operational outlook, expansion plans, future direction, strategic initiatives, business plans, regulatory environment, growth prospects, pipeline, financial performance, timing and scope of projects, future market conditions, funding and capital requirements, partnerships, or other business developments. The forward-looking information reflects management’s current expectations based on information currently available and are subject to a number of risks and uncertainties that may cause outcomes to differ materially from those discussed in the forward-looking information. Although the Company believes that the assumptions and factors used in preparing the forward-looking information are reasonable, undue reliance should not be placed on such information and no assurance can be given that such events will occur in the disclosed timeframes or at all.

In addition, any statements made in this news release are not guarantees of future performance and are subject to a number of known and unknown risks, uncertainties, and other factors, many of which are outside the Company’s control, that could cause actual results or outcomes to differ materially from those expressed or implied by such forward-looking statements. These factors include, but are not limited to: fluctuations in commodity prices, changes in regulatory or political environments, operational risks, financing risks, market demand for emissions reduction or environmental services, delays in project execution, reliance on third-party partners or vendors, competition, and the overall economic environment. For a more detailed discussion of these factors and other risks, see the section entitled “Financial Risks” in Zefiro’s management’s discussion and analysis for the year ended June 30, 2025 and “Risk Factors” in Zefiro’s annual information form for the year ended June 30, 2025, each of which is available under Zefiro’s profile on SEDAR+ at www.sedarplus.ca/.

Factors that could cause actual results or events to differ materially from current expectations include, but are not limited to: (i) Adverse general market and economic conditions; (ii) Changes to and price and volume volatility in the carbon market; (iii) Changes to the regulatory landscape and global policies applicable to the Company’s business; (iv) Failure to obtain all necessary regulatory approvals; (v) Anticipated outcomes from the contract as outlined in the press release; as well as other risk factors set forth in the Company’s most recent Prospectus under the heading “Risk Factors”. The Company operates in a rapidly evolving environment where technologies are in the early stage of adoption. New risk factors emerge from time to time, and it is impossible for the Company’s management to predict all risk factors, nor can the Company assess the impact of all factors on Company’s business or the extent to which any factor, or combination of factors, may cause actual results to differ from those contained in any forward-looking information. Forward-looking information in this news release is based on the opinions and assumptions of management considered reasonable as of the date hereof, including, but not limited to, the assumption that general business and economic conditions will not change in a materially adverse manner. Although the Company believes that the assumptions and factors used in preparing the forward-looking information in this news release are reasonable, undue reliance should not be placed on such information. The forward-looking information included in this news release is made as of the date of this news release and the Company expressly disclaims any intention or obligation to update or revise any forward-looking information whether as a result of new information, future events or otherwise, except as required by applicable law.

Zefiro Methane Corp. does not undertake any obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by applicable law. Readers are cautioned not to place undue reliance on these forward-looking statements.

Also, this news release may include market and industry data obtained from various publicly available sources and other sources believed by the Company to be true. Although the Company believes it to be reliable, the Company has not independently verified any of the data from third-party sources referred to in this presentation or analyzed or verified the underlying reports relied upon or referred to by such sources, or ascertained the underlying assumptions relied upon by such sources. The Company does not make any representation as to the accuracy of such information.

This news release is for informational purposes only and does not constitute an offer to sell or a solicitation of an offer to buy any securities of Zefiro Methane Corp., nor shall it form the basis of or be relied upon in connection with any investment decision.

Statement Regarding Third-Party Investor Relations Firms

Disclosures relating to investor relations firms retained by Zefiro Methane Corp. can be found under the Company’s profile on SEDAR+ at www.sedarplus.ca/.

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