Cover |
12 Months Ended |
|---|---|
Dec. 30, 2025 | |
| Document Information [Line Items] | |
| Document Type | 11-K |
| Entity Registrant Name | American States Water Company |
| Amendment Flag | false |
| Entity Central Index Key | 0001056903 |
| EBP 005 | |
| Document Information [Line Items] | |
| Document Type | 11-K |
| Entity Registrant Name | American States Water Company |
| Amendment Flag | false |
| Entity Central Index Key | 0001056903 |