CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 33,892,655	$ 37,624,179
Restricted cash	0	7,500,000
Marketable securities	8,570,338	8,496,372
Accounts receivable, net	12,516,466	8,537,232
Inventory	1,757,601	1,451,639
Prepaid expenses and other current assets	2,709,185	1,880,105
Current portion of loans receivable	1,812,532	1,843,600
Total current assets	61,258,777	67,333,127
Property, plant and equipment, net	58,993,406	64,185,110
Construction in progress	2,612,800	141,204
Inventory, non-current	3,970,241	3,861,470
Loans receivable	9,028,279	10,758,873
Investment in OC-BVI	6,925,346	6,634,598
Intangible assets, net	1,455,015	1,501,824
Goodwill	3,499,037	3,587,754
Other assets	2,706,185	2,855,471
Total assets	150,449,086	160,859,431
LIABILITIES AND EQUITY
Accounts payable and other current liabilities	5,867,456	4,617,770
Dividends payable	1,158,967	1,156,081
Current portion of long term debt	1,647,493	17,531,134
Total current liabilities	8,673,916	23,304,985
Long term debt	5,205,167	6,852,660
Other liabilities	435,413	420,430
Total liabilities	14,314,496	30,578,075
Equity
Redeemable preferred stock, $0.60 par value. Authorized 200,000 shares; issued and outstanding 30,265 and 22,427 shares, respectively	18,159	13,456
Additional paid-in capital	82,467,421	81,939,211
Retained earnings	42,965,179	38,030,943
Total Consolidated Water Co. Ltd. stockholders' equity	134,206,566	128,724,827
Non-controlling interests	1,928,024	1,556,529
Total equity	136,134,590	130,281,356
Total liabilities and equity	150,449,086	160,859,431
Class A Common Stock [Member]
Equity
Common stock	8,755,807	8,741,217
Class B Common Stock [Member]
Equity
Common stock	$ 0	$ 0