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CONSOLIDATED STATEMENTS OF INCOME (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Retail water revenues $ 23,356,338 $ 21,864,252 $ 23,239,756
Bulk water revenues 30,757,874 25,302,093 25,905,077
Services revenues 1,040,280 3,542,209 8,874,684
Total revenues 55,154,492 50,708,554 58,019,517
Cost of retail revenues 11,496,598 10,361,302 9,812,434
Cost of bulk revenues 24,127,488 20,907,981 20,149,969
Cost of services revenues 508,339 2,828,776 5,058,037
Total cost of revenues 36,132,425 34,098,059 35,020,440
Gross profit 19,022,067 16,610,495 22,999,077
General and administrative expenses 13,651,650 11,329,648 10,101,257
Income from operations 5,370,417 5,280,847 12,897,820
Other income (expense):      
Interest income 1,200,999 1,375,827 917,330
Interest expense (1,141,744) (1,584,771) (1,698,084)
Other income 283,656 136,113 168,584
Equity in earnings (loss) of OC-BVI 838,652 1,235,146 (1,025,968)
Impairment of investment in OC-BVI     (4,660,000)
Other income (expense), net 1,181,563 1,162,315 (6,298,138)
Net income 6,551,980 6,443,162 6,599,682
Income attributable to non-controlling interests 438,762 151,137 501,111
Net income attributable to Consolidated Water Co. Ltd. stockholders $ 6,113,218 $ 6,292,025 $ 6,098,571
Basic earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders $ 0.42 $ 0.43 $ 0.42
Diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders $ 0.42 $ 0.43 $ 0.42
Dividends declared per common share $ 0.300 $ 0.300 $ 0.280
Weighted average number of common shares used in the determination of:      
Basic earnings per share 14,560,259 14,547,065 14,535,192
Diluted earnings per share 14,596,013 14,597,894 14,588,144