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Earnings per share (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Line Items]
Net income attributable to Consolidated Water Co. Ltd. common stockholders	$ 6,265,358us-gaap_NetIncomeLoss	$ 8,594,519us-gaap_NetIncomeLoss	$ 9,315,514us-gaap_NetIncomeLoss
Less: preferred stock dividends	(11,485)us-gaap_DividendsPreferredStock	(11,222)us-gaap_DividendsPreferredStock	(9,080)us-gaap_DividendsPreferredStock
Net income available to common shares in the determination of basic earnings per common share	$ 6,253,873us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ 8,583,297us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ 9,306,434us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Weighted average number of common shares in the determination of basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders (in shares)	14,697,896us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	14,633,884us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	14,578,518us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Weighted average number of preferred shares outstanding during the period (in shares)	37,924us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock	34,827us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock	27,057us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock
Potential dilutive effect of unexercised options (in shares)	28,503us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants	35,169us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants	573us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders (in shares)	14,764,323us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	14,703,880us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	14,606,148us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method.

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