General (Policies) |
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| Accounting Policies [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Basis of Accounting | The unaudited interim financial information has been prepared in accordance with accounting principles generally accepted in the United States of America and in accordance with the instructions for Form 10-Q and Rule 10-01 of Regulation S-X promulgated by the Securities and Exchange Commission (“SEC”). The Notes to Consolidated Financial Statements in H2O America’s 2025 Annual Report on Form 10-K, filed with the SEC on February 26, 2026, should be read in conjunction with the accompanying unaudited condensed consolidated financial statements.
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| Revenue | Revenue Water sales are seasonal in nature and influenced by weather conditions. The timing of precipitation and climatic conditions can cause seasonal water consumption by customers to vary significantly. Due to the seasonal nature of the water business, the operating results for interim periods are not indicative of the operating results for a 12-month period. Revenue is generally higher in the warm, dry summer months when water usage and sales are greater, and lower in the winter months when cooler temperatures and increased precipitation curtail water usage resulting in lower sales.
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| Fair Value Measurement | Fair Value Measurement The following instruments are not measured at fair value on H2O America’s condensed consolidated balance sheets as of June 30, 2026, but require disclosure of their fair values: cash and cash equivalents, accounts receivable and accounts payable. The estimated fair value of such instruments as of June 30, 2026 approximates their carrying value as reported on the condensed consolidated balance sheets. There have been no changes in valuation techniques during the three and six months ended June 30, 2026. The fair value of these instruments would be categorized as Level 2 in the fair value hierarchy, with the exception of cash and cash equivalents, which would be categorized as Level 1.
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| Earnings per Share | Earnings per Share Basic earnings per share is calculated using income available to common stockholders, divided by the weighted average number of shares outstanding during the period. Diluted earnings per share is calculated using the treasury stock method which comprises income available to common stockholders divided by the weighted average number of shares of common stock including both shares outstanding and shares potentially issuable in connection with restricted common stock awards under H2O America’s long-term incentive plans, and shares potentially issuable under the equity forward purchase agreements granted to investors in the equity offering discussed further in Note 3 “Capitalization” to these condensed consolidated financial statements.
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| New Accounting Standards | New Accounting Standards The recently issued accounting standards that have not yet been adopted by the company as of June 30, 2026 are as follows:
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