Jonathan Reeder

Davis Sunderland

Michael Gaugler

Agnieszka Storozynski

- CALIFORNIA WATER SERVICE GROUP authorized the issue and sale of **$170,000,000** aggregate principal amount of Senior Notes.  **[1035201_0001104659-25-096613_tm2527762d1_ex10-1.htm:4]** 
- This includes **$70,000,000** in **4.87% Senior Notes, Series A, due October 1, 2032**.  **[1035201_0001104659-25-096613_tm2527762d1_ex10-1.htm:4]** **[1035201_0001104659-25-096613_tm2527762d1_ex10-1.htm:70]** 
- Additionally, **$100,000,000** in **5.22% Senior Notes, Series B, due October 1, 2035** were authorized.  **[1035201_0001104659-25-096613_tm2527762d1_ex10-1.htm:4]** **[1035201_0001104659-25-096613_tm2527762d1_ex10-1.htm:71]** 
- The sale and purchase of these Notes occurred at a closing on **October 1, 2025**.  **[1035201_0001104659-25-096613_tm2527762d1_ex10-1.htm:4]**

CALIFORNIA WATER SERVICE (CWT)