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Cover
May 05, 2025
Cover [Abstract]  
Document Type 8-K
Document Period End Date May 05, 2025
Registrant Name H2O America
Entity Incorporation, State or Country Code DE
Entity File Number 001-8966
Entity Tax Identification Number 77-0066628
Entity Address, Address Line One 110 West Taylor Street,
Entity Address, City or Town San Jose,
Entity Address, State or Province CA
Entity Address, Postal Zip Code 95110
City Area Code 408
Local Phone Number 279-7800
Entity Information, Former Legal or Registered Name SJW Group
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $0.001 per share
Trading Symbol HTO
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Amendment Flag false
Central Index Key 0000766829
Current Fiscal Year End Date --12-31