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Segment information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Segment Reporting Information [Line Items]      
Revenues $ 62,306,665 $ 57,875,707 $ 57,116,202
Cost of revenues 36,872,165 33,624,821 33,807,982
Gross profit (loss) 25,434,500 24,250,886 23,308,220
General and administrative expenses 19,072,979 18,677,584 14,840,156
Long-lived asset impairment and (gain)/loss on dispositions, net 3,040,158 3,435,619 32,566
Income (loss) from operations 3,321,363 2,137,683 8,435,498
Other income, net 1,522,233 103,573 (510,004)
Income before income taxes 4,843,596 2,241,256 7,925,494
Provision for (benefit from) income taxes (888,977) (536,057) 0
Net income 5,732,573 2,777,313 7,925,494
Loss attributable to non-controlling interests (411,489) (1,183,188) 406,793
Net income attributable to Consolidated Water Co. Ltd. stockholders 6,144,062 3,960,501 7,518,701
Accounts receivable, net 15,047,846 16,500,798  
Property, plant and equipment, net 50,525,064 53,084,105  
Construction in progress 1,823,284 885,494  
Intangibles, net 3,765,434 5,195,476  
Goodwill 8,384,248 9,784,248  
Land held for development 20,558,424 20,558,424  
Total segment assets 165,480,895 163,604,528  
Retail [Member]      
Segment Reporting Information [Line Items]      
Revenues 23,225,066 23,505,619 23,254,757
Cost of revenues 10,372,199 10,294,298 10,543,972
Gross profit (loss) 12,852,867 13,211,321 12,710,785
General and administrative expenses 12,134,983 11,460,165 11,095,349
Long-lived asset impairment and (gain)/loss on dispositions, net 1,640,158 1,953,943 33,166
Income (loss) from operations (922,274) (202,787) 1,582,270
Accounts receivable, net 2,406,595 2,646,628  
Property, plant and equipment, net 23,172,382 24,890,031  
Construction in progress 321,368 134,392  
Intangibles, net 0 0  
Goodwill 1,170,511 1,170,511  
Land held for development 0 0  
Total segment assets 52,095,524 54,303,011  
Bulk [Member]      
Segment Reporting Information [Line Items]      
Revenues 31,621,756 29,647,034 31,854,255
Cost of revenues 21,066,207 19,488,550 21,634,789
Gross profit (loss) 10,555,549 10,158,484 10,219,466
General and administrative expenses 1,248,414 1,744,840 1,605,943
Long-lived asset impairment and (gain)/loss on dispositions, net 0 (1,000) (600)
Income (loss) from operations 9,307,135 8,414,644 8,614,123
Accounts receivable, net 10,177,620 12,692,714  
Property, plant and equipment, net 25,420,819 26,124,724  
Construction in progress 1,498,625 743,296  
Intangibles, net 533,767 599,960  
Goodwill 2,328,526 2,328,526  
Land held for development 0 0  
Total segment assets 75,785,323 68,663,628  
Services [Member]      
Segment Reporting Information [Line Items]      
Revenues 469,347 835,770 2,007,190
Cost of revenues 469,797 751,139 1,629,221
Gross profit (loss) (450) 84,631 377,969
General and administrative expenses 3,043,078 3,163,972 2,138,864
Long-lived asset impairment and (gain)/loss on dispositions, net 0 (271,726) 0
Income (loss) from operations (3,043,528) (2,807,615) (1,760,895)
Accounts receivable, net 1,155,318 629,930  
Property, plant and equipment, net 84,339 91,030  
Construction in progress 3,291 0  
Intangibles, net 0 15,516  
Goodwill 0 0  
Land held for development 20,558,424 20,558,424  
Total segment assets 24,488,173 25,558,495  
Manufacturing Units [Member]      
Segment Reporting Information [Line Items]      
Revenues 6,990,496 3,887,284 0
Cost of revenues 4,963,962 3,090,834 0
Gross profit (loss) 2,026,534 796,450 0
General and administrative expenses 2,646,504 2,308,607 0
Long-lived asset impairment and (gain)/loss on dispositions, net 1,400,000 1,754,402 0
Income (loss) from operations (2,019,970) (3,266,559) $ 0
Accounts receivable, net 1,308,313 531,526  
Property, plant and equipment, net 1,847,524 1,978,320  
Construction in progress 0 7,806  
Intangibles, net 3,231,667 4,580,000  
Goodwill 4,885,211 6,285,211  
Land held for development 0 0  
Total segment assets $ 13,111,875 $ 15,079,394