Hawaiʻi Water offices are closed on the below dates.
| 2021 Date | Closure Reason |
|---|---|
| January 1 | New Year’s Day |
| January 18 | Martin Luther King, Jr. Day |
| February 15 | Presidents’ Day |
| May 31 | Memorial Day |
| June 11 | King Kamehameha I Day |
| July 5 | Independence Day |
| September 6 | Labor Day |
| November 11 | Veterans Day |
| November 25, 26 | Thanksgiving |
| December 24 | Christmas |