Consolidated Water Co. Ltd.

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and Board of Directors of

Consolidated Water Co. Ltd.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Consolidated Water Co. Ltd. (the “Company”) as of December 31, 2024 and 2023, the related consolidated statements of income, stockholders’ equity and cash flows for each of the three years in the period ended December 31, 2024, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2024, in conformity with accounting principles generally accepted in the United States of America.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) ("PCAOB"), the Company's internal control over financial reporting as of December 31, 2024, based on the criteria established in Internal Control – Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in 2013** *and our report dated March 17, 2025,*expressed an adverse opinion on the effectiveness of the Company’s internal control over financial reporting because of the existence of a material weakness.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits** **provide a reasonable basis for our opinion.

Critical Audit Matters

The critical audit matters communicated below are matters arising from the current period audit of the financial statements that were communicated or required to be communicated to the audit committee and that: (1) relate to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.

Revenue Recognition - Estimated Costs to Complete

As described in Note 2 to the consolidated financial statements, the Company recognizes revenue for its construction and custom/specialized manufacturing contracts over time under the input method using costs incurred to date relative to the total estimated costs at completion to measure progress toward satisfying a contract's performance obligations as such measure best reflects the transfer of control of the promised good to the customer. The cost estimation process for these contracts is based on the knowledge and experience of the Company's project managers, engineers, and financial professionals. Changes in job performance, job conditions and management's assessment of expected variable

consideration are factors that influence estimates of the total contract transaction price, total costs to complete those contracts and the Company's revenue recognition.

We identified the estimated costs to complete on these revenue contracts as a critical audit matter. The determination of the total estimated cost and progress toward completion requires management to make significant estimates and assumptions. Total estimated costs to complete projects include various contracts costs that include labor, materials and subcontractor costs. Due to the extended time it may take to complete many of the Company’s contracts and the scope and nature of the work required to be performed on those contracts, the estimations of total revenue and costs at completion is complicated and subject to many variables and, accordingly, are subject to changes. Changes in these estimates can have a significant impact on the revenue recognized each period. Auditing these estimates involved especially challenging auditor judgment in evaluating the reasonableness of management's assumptions and estimates over the duration of these contracts.

The primary procedures we performed to address this critical audit matter included:

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM ON INTERNAL CONTROL OVER FINANCIAL REPORTING

To the Shareholders and Board of Directors of

Consolidated Water Co. Ltd.

Adverse Opinion on Internal Control over Financial Reporting

We have audited Consolidated Water Co. Ltd.’s (the "Company") internal control over financial reporting as of December 31, 2024, based on criteria established inInternal Control-Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. In our opinion, because of the effect of the material weakness described in the subsequent paragraphs on the achievement of the objectives of the control criteria, the Company** **has not maintained effective internal control over financial reporting as of December 31, 2024, based on criteria established inInternal Control-Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

A material weakness is a control deficiency, or combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of the Company's annual or interim financial statements will not be prevented or detected ona timely basis. The following material weakness has been identified and included in “Management’s Annual Report on Internal Control Over Financial Reporting”:

Business process controls (automated and manual) that are dependent on information technology general controls (ITGCs) from January 1, 2024 through October 31, 2024 could have been adversely affected due to the ineffective ITGCs during this time period. Due to the lack of a sufficient time period over which to demonstrate operating effectiveness, certain annual and quarterly business process controls are considered to be ineffective as of December 31, 2024.

This material weakness was considered in determining the nature, timing and extent of audit tests applied in our audit of the fiscal December 31, 2024 financial statements and this report does not affect our report dated March 17, 2025 on those financial statements.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the balance sheets as of December 31, 2024 and 2023 and the related statements of income, stockholders’ equity, and cash flows for each of the three years in the period ended December 31, 2024** and our report dated March 17, 2025 **expressed an unqualified opinion on those financial statements.

Basis for Opinion

The Company's management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying “Management’s Annual Report on Internal Control Over Financial Reporting”. Our responsibility is to express an opinion on the Company's internal control over financial reporting basedon ouraudit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting wasmaintained in all material respects. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness ofinternal control based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in thecircumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. Acompany's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, inreasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, ordisposition of the company's assets that could have a material effect on the financial statements.

Because of the inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of anyevaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that degree of compliance with the policies or procedures may deteriorate.

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/s/ Marcum LLP

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We have served as the Company’s auditor since 2005.

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West Palm Beach, Florida

March 17, 2025