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Earnings per share (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Earnings per share |  |  |  |
Net income from continuing operations attributable to Consolidated Water Co. Ltd. Stockholders | $ 5,178,761 | $ 4,242,411 | $ 10,102,871 | $ 11,183,825
Less: preferred stock dividends | (6,978) | (4,660) | (11,469) | (8,843)
Net income from continuing operations available to common shares in the determination of basic earnings per common share | 5,171,783 | 4,237,751 | 10,091,402 | 11,174,982
Income (loss) from discontinued operations | (82,556) | 11,607,846 | (215,637) | 11,140,780
Net income available to common shares in the determination of basic earnings per common share | $ 5,089,227 | $ 15,845,597 | $ 9,875,765 | $ 22,315,762
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) | 15,916,685 | 15,829,120 | 15,916,278 | 15,829,024
Weighted average number of preferred shares outstanding during the period (in shares) | 42,510 | 44,176 | 42,114 | 44,178
Potential dilutive effect of unexercised options and unvested stock grants (in shares) | 85,116 | 110,375 | 85,140 | 110,952
Weighted average number of shares used for determining diluted earnings per common share attributable to Consolidated Water Co. Ltd. common stockholders (in shares) | 16,044,311 | 15,983,671 | 16,043,532 | 15,984,154

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