DATA & STATISTICS
2026 Groundwater Status Reports
See the monthly groundwater status reports from the Board of Water Supply for January through December 2026.
February 2026 Groundwater Levels Status Report
Check back after the March 2026 board meeting.
January 2026 Groundwater Levels Status Report
Eight aquifer index stations were in low groundwater condition for the production month of January 2026. Beretania, Moanalua, Pearl City, Waipahu, Kaluanui, and Waialua are in Caution Status. Kaimukī and Punaluʻu are in Alert Status. The monthly production average for January 2026 was 123.99 million gallons per day.
The Board of Water Supply (BWS) rainfall index for the month of January 2026 was 90 percent of normal, with a 5-month moving average of 81 percent. As of February 3, 2026, the Hawaiʻi Drought Monitor shows no drought conditions across most of Oʻahu, grading to abnormally dry conditions along narrow portions of the northern, windward, and southern coasts, then to moderate drought conditions along the southeastern coast. The National Weather Service is forecasting above-normal precipitation through May 2026.
Most monitoring wells exhibited increasing head levels for the month of January 2026. This likely reflects the relatively higher rainfall over the past month, combined with seasonal decreased production. Consumer water conservation measures, as encouraged by recent BWS community awareness messaging, may also play a role. Average monthly production for January 2026 is lower than January 2025 and the 5-year monthly average.
Updated: 02/24/2026