2. Accounting policies

Basis of preparation: The consolidated financial statements presented are prepared in accordance with the accounting principles generally accepted in the United States of America.

Use of estimates: The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Significant items subject to estimates and assumptions include the carrying value of property, plant and equipment, intangible assets, goodwill and the fair value of the Company’s investment in its affiliate. Actual results could differ significantly from such estimates.

Basis of consolidation: The accompanying consolidated financial statements include the accounts of the Company’s (i) wholly-owned subsidiaries, Aquilex, Inc., Cayman Water Company Limited (“Cayman Water”), Consolidated Water (Belize) Limited (“CW-Belize”), Ocean Conversion (Cayman) Limited (“OC-Cayman”), DesalCo Limited (“DesalCo”), Consolidated Water Cooperatief, U.A. (“CW-Cooperatief”), Consolidated Water U.S. Holdings, Inc. (“CW-Holdings”); and (ii) majority-owned subsidiaries Consolidated Water (Bahamas) Ltd. (“CW-Bahamas”), Aerex Industries, Inc. (“Aerex”), Consolidated Water (Asia) Pte. Limited, PT Consolidated Water Bali (“CW-Bali”), N.S.C. Agua, S.A. de C.V. (“NSC”) and Aguas de Rosarito S.A.P.I. de C.V. (“AdR”). The Company’s investment in its affiliate Ocean Conversion (BVI) Ltd. (“OC-BVI”) is accounted for using the equity method of accounting. All significant intercompany balances and transactions have been eliminated in consolidation.

Foreign currency: The Company’s reporting currency is the United States dollar (“US$”). The functional currency of the Company and its foreign operating subsidiaries (other than CW-Bali, NSC and CW-Cooperatief) is the currency for each respective country. As discussed in Note 18, the Company changed the functional currency of CW-Bali from the Indonesian rupiah to the US$ as of October 1, 2016. The functional currency for NSC and CW-Cooperatief is the US$. The exchange rates for the Cayman Islands dollar, the Belize dollar and the Bahamian dollar are fixed to the US$. CW-Cooperatief conducts business in US$ and euros, CW-Bali conducts business in US$ and Indonesian rupiahs, and NSC conducts business in US$ and Mexican pesos. The exchange rates for conversion of euros, rupiahs and Mexican pesos into US$ vary based upon market conditions. Net foreign currency gains (losses) arising from transactions and re-measurements were $50,299, ($485,291) and ($111,409) for the years ended December 31, 2016, 2015 and 2014, respectively, and are included in “Other income (expense) - Other” in the accompanying consolidated statements of income.

Comprehensive income: Comprehensive income (loss) is defined as the change in equity during a period from transactions and other events from non-owner sources. Comprehensive income (loss) is the total of net income and other comprehensive income (loss) which, for the Company, is comprised entirely of foreign currency translation adjustments related to CW-Bali.

Cash and cash equivalents: Cash and cash equivalents consist of demand deposits at banks and highly liquid deposits at banks with an original maturity of three months or less. Cash and cash equivalents as of December 31, 2016 and December 31, 2015 include $1.0 million and $13.6 million, respectively, of certificates of deposits with an original maturity of three months or less.

As of December 31, 2016, the Company had deposits in U.S. banks in excess of federally insured limits of approximately $2.0 million. As of December 31, 2016, the Company held cash in foreign bank accounts of approximately $40.0 million.

Transfers from the Company’s Bahamas and Belize bank accounts to Company bank accounts in other countries require the approval of the Central Bank of the Bahamas and Belize, respectively. As of December 31, 2016, the equivalent United States dollar cash balances for deposits held in the Bahamas and Belize were approximately $5.9 million and $4.9 million, respectively.

Accounts receivable and allowance for doubtful accounts: Accounts receivable are recorded at invoiced amounts based on meter readings or minimum take-or-pay amounts per contractual agreements. The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses in the Company’s existing accounts receivable balance. The Company determines the allowance for doubtful accounts based on historical write-off experience and monthly review of delinquent accounts. Past due balances are reviewed individually for collectability and disconnection. Account balances are charged off against the allowance for doubtful accounts after all means of collection have been exhausted and the potential for recovery is considered by management to be remote.

Inventory: Inventory primarily includes consumables stock and spare parts stock that are valued at the lower of cost or net realizable value with cost determined on the first-in, first-out basis. Inventory also includes potable water held in the Company’s reservoirs. The carrying amount of the water inventory is the lower of the average cost of producing water during the year or its net realizable value.

Loans receivable: Loans receivable relate to notes receivable from customers arising from the construction and sale of water desalination plants. The allowance for loan losses, if any, is the Company’s best estimate of the amount of probable credit losses in the Company’s existing loans and is determined on an individual loan basis.

Property, plant and equipment: Property, plant and equipment is stated at cost less accumulated depreciation. Depreciation is calculated using a straight line method with an allowance for estimated residual values. Rates are determined based on the estimated useful lives of the assets as follows:

Buildings		5 to 40 years
Plant and equipment		4 to 40 years
Distribution system		3 to 40 years
Office furniture, fixtures and equipment		3 to 10 years
Vehicles		3 to 10 years
Leasehold improvements		Shorter of 5 years or lease term
Lab equipment		5 to 10 years

Additions to property, plant and equipment are comprised of the cost of the contracted services, direct labor and materials. Assets under construction are recorded as additions to property, plant and equipment upon completion of the projects. Depreciation commences in the month the asset is placed in service.

Long-lived assets: Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets might not be recoverable. Conditions that would necessitate an impairment assessment include a significant decline in the observable market value of an asset, a significant change in the extent or manner in which an asset is used, or a significant adverse change that would indicate that the carrying amount of an asset or group of assets is not recoverable. For long-lived assets to be held and used, the Company recognizes an impairment loss only if its carrying amount is not recoverable through its undiscounted cash flows and measures the impairment loss based on the difference between the carrying amount and estimated fair value.

Construction in progress: Interest costs directly attributable to the acquisition and construction of qualifying assets, which are assets that necessarily take a substantial period of time to be ready for their intended use, are added to the cost of those assets until such time as the assets are substantially ready for use. No interest was capitalized during the years ended December 31, 2016, 2015 or 2014.

Goodwill and intangible assets: Goodwill represents the excess cost over the fair value of the assets of an acquired business. Goodwill and intangible assets acquired in a business combination accounted for as a purchase and determined to have an indefinite useful life are not amortized, but are tested for impairment at least annually. Intangible assets with estimable useful lives are amortized over their respective estimated useful lives to their estimated residual values and reviewed periodically for impairment. The Company evaluates the possible impairment of goodwill annually as part of its reporting process for the fourth quarter of each fiscal year. Management identifies the Company’s reporting units, which consist of the retail and bulk business segments and Aerex, and determines the carrying value of each reporting unit by assigning the assets and liabilities, including the existing goodwill and intangible assets, to those reporting units. The Company determines the fair value of each reporting unit and compares the fair value to the carrying amount of the reporting unit. To the extent the carrying amount of the reporting unit exceeds the fair value of the reporting unit, the Company is required to perform the second step of the impairment test, as this is an indication that the reporting unit’s goodwill may be impaired. In this step, the Company compares the implied fair value of the reporting unit’s goodwill with the carrying amount of the reporting unit’s goodwill. The implied fair value of goodwill is determined by allocating the fair value of the reporting unit to all the assets (recognized and unrecognized) and liabilities of the reporting unit in a manner similar to a purchase price allocation. The residual fair value after this allocation is the implied fair value of the reporting unit’s goodwill. If the implied fair value is less than its carrying amount, the impairment loss is recorded.

For the years ended December 31, 2016 and 2015, the Company estimated the fair value of its reporting units by applying the discounted cash flow method, the subject company stock price method, the guideline public company method, and the mergers and acquisitions method.

The discounted cash flow method relied upon seven-year discrete projections of operating results, working capital and capital expenditures, along with a terminal value subsequent to the discrete period. These seven-year projections were based upon historical and anticipated future results, general economic and market conditions, and considered the impact of planned business and operational strategies. The discount rates for the calculations represented the estimated cost of capital for market participants at the time of each analysis. In preparing these seven-year projections for its retail unit, the Company (i) identified possible outcomes of its on-going negotiations with the Cayman Islands government for the renewal of its retail license; (ii) estimated the cash flows associated with each possible outcome; and (iii) assigned a probability to each outcome and associated estimated cash flows. The weighted average estimated cash flows were then summed to determine the overall fair value of the retail unit under this method. The possible outcomes used for the discounted cash flow method for the retail unit included the implementation of a rate of return on invested capital model, the methodology proposed by Cayman Islands government representatives for the new retail license.

The Company also estimated the fair value of each of its reporting units for the years ended December 31, 2016 and 2015 through reference to the quoted market prices for the Company and guideline companies and the market multiples implied by guideline merger and acquisition transactions.

The Company weighted the fair values estimated for each of its reporting units under each method and summed such weighted fair values to estimate the overall fair value for each reporting unit. The respective weightings the Company applied to each method as of December 31, 2016 were consistent with those used as of December 31, 2015 and were as follows:

Method	Retail			Bulk
Discounted cash flow		50	%		50	%
Subject company stock price		30	%		30	%
Guideline public company		10	%		10	%
Mergers and acquisitions		10	%		10	%
		100	%		100	%

The fair values the Company estimated for its retail, bulk and Aerex units exceeded their carrying amounts by 123%, 41% and 26%, respectively, as of December 31, 2016. The fair values the Company estimated for its retail and bulk units exceeded their carrying amounts by 72% and 20%, respectively, as of December 31, 2015.

The Company also performed an analysis reconciling the conclusions of value for its reporting units to its market capitalization at December 31, 2016. This reconciliation resulted in no implied control premium for the Company.

On February 11, 2016, the Company acquired 51% ownership interest in Aerex. In connection with this acquisition the Company recorded goodwill of $8,035,211. Aerex’s actual results of operations subsequent to the Company’s acquisition have fallen significantly short of the projected results for this period that were included in the overall cash flow projections the Company utilized to determine the purchase price for Aerex and the fair values of its assets and liabilities. Based upon currently available information, the Company believes Aerex’s results of operations for fiscal 2017 will also fall short of its purchase price projections for Aerex. Due to these actual and projected shortfalls in Aerex’s results of operations, the Company tested Aerex’s goodwill for possible impairment as of September 30, 2016 by estimating its fair value using the discounted cash flow method. As a result of this impairment testing, the Company determined that the carrying value of the Aerex goodwill exceeded its fair value, and recorded an impairment loss of $1,750,000 for the three months ended September 30, 2016 to reduce the carrying value of this goodwill to $6,285,211. The Company may be required to record additional impairment losses to reduce the carrying value of its Aerex goodwill in future periods if the Company determines it likely that Aerex’s results of operations will continue to fall short of its purchase price projections.

Investments: Investments where the Company does not exercise significant influence over the operating and financial policies of the investee and holds less than 20% of the voting stock are recorded at cost. The Company uses the equity method of accounting for investments in common stock where the Company holds 20% to 50% of the voting stock of the investee and has significant influence over its operating and financial policies but does not meet the criteria for consolidation. The Company recognizes impairment losses on declines in the fair value of the stock of investees that are other than temporary.

Other assets: Under the terms of CW-Bahamas’ contract with the Water and Sewerage Corporation of The Bahamas to supply water from its Blue Hills desalination plant, CW-Bahamas was required to reduce the amount of water lost by the public water distribution system on New Providence Island, The Bahamas, over a one year period by 438 million gallons, a requirement CW Bahamas met during 2007. The Company was solely responsible for the engineering, labor and materials costs incurred to effect the reduction in lost water, which were capitalized and are being amortized on a straight-line basis over the original remaining life of the Blue Hills contract. Such costs are included in other assets and aggregated approximately $3.5 million as of December 31, 2016 and 2015. Accumulated amortization for these costs was approximately $1.8 million and $1.6 million as of December 31, 2016 and 2015, respectively.

Other liabilities: Other liabilities consist of security deposits received from large customers as security for accounts receivable from such customers.

Income taxes: The Company accounts for the income taxes arising from the operations of its United States and Mexico subsidiaries under the asset and liability method. Deferred tax assets and liabilities, if any, are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is provided to the extent any deferred tax asset may not be realized.

CW-Belize is liable for business and corporate income taxes. Under the terms of its water supply agreement with Belize Water Services Ltd. (“BWSL”), its sole customer, CW-Belize is reimbursed by BWSL for all taxes that it is required to pay and records this reimbursement as an offset to its tax expense.

The Company is not presently subject to income taxes in the other countries in which it operates.

Construction revenue and cost of construction revenue: The Company recognizes revenue and related costs as work progresses on long term fixed price construction contracts using the percentage-of-completion method, which relies on contract revenue and estimates of total expected costs. The Company follows this method since it can make reasonably dependable estimates of the revenue and costs applicable to various stages of a contract. Under the percentage-of-completion method, the Company records revenue and recognizes profit or loss as work on the contract progresses. The Company estimates total project costs and profit to be earned on each long term, fixed price contract prior to commencement of work on the contract and updates these estimates as work on the contract progresses. The cumulative amount of revenue recorded on a contract at a specified point in time is that percentage of total estimated revenue that incurred costs to date comprises of estimated total contract costs. If, as work progresses, the actual contract costs exceed estimates, the profit recognized on revenue from that contract decreases. The Company recognizes the full amount of any estimated loss on a contract at the time the estimates indicate such a loss. Any costs and estimated earnings in excess of billings are classified as current assets. Billings in excess of costs and estimated earnings on uncompleted contracts, if any, are classified as current liabilities.

With respect to the plant construction contracts awarded as the result of a tender process, the Company assumes the risk that the costs associated with constructing the plant may be greater than it anticipated in preparing its bid, as the terms of such tender processes typically require the winner to guarantee the sales price for the plant at the bid amount. Because the Company bases its contracted sales price in part on its estimation of future construction costs, the profitability of its plant sales is dependent on its ability to estimate these costs accurately. The cost estimates the Company prepares in connection with the construction of plants to be sold to third parties are subject to inherent uncertainties. The cost of materials and construction may increase significantly after the Company submits its tender and accompanying bid price for a plant due to factors beyond the Company’s control, which could cause the profit margin for a plant to be less than the Company anticipated when the tender was submitted. The profit margin the Company initially expects to generate from a plant sale could be further affected by other factors, such as hydro-geologic conditions at the plant site that differ materially from those the Company believes exists, and therefore relies upon, in determining its bid price.

Revenue from water sales: The Company recognizes revenues from water sales at the time water is supplied to the customer’s facility or storage tank. The amount of water supplied is determined based upon water meter readings performed at the end of each month. Under the terms of both its license agreement with the government of the Cayman Islands and its bulk water supply contracts, the Company is entitled to charge its customers the greater of a minimum monthly charge or the price for water supplied during the month.

Comparative amounts: Certain amounts presented in the financial statements previously issued for 2015 and 2014 have been reclassified to conform to the current year’s presentation.