Reported Ground Water Pumpage

Under the Hawaii Administrative Rules Title 13 Chapter 168 Subtitle 7, the collection & submittal of monthly water use reporting, including pumpage, chloride concentrations, temperature, and (pump off) water level data, is required. The Commission on Water Resource Management collects and evaluates the data for each Aquifer System of the Islands of Kauai, Oahu, Molokai, Lanai, Maui and Hawaii. This data is very important to our mission to protect and enhance the water resources of the State of Hawaii through wise and responsible management.

The 12 Month Moving Average (12-MAV) is used to smooth out short-term fluctuations and highlight longer-term trends or cycles in pumpage. To determine the 12-MAV for a selected month: the pumpage in million gallons per day (mgd) for the selected month is added to the pumpage in mgd for the previous 11 months then this total is divided by 12 (or averaged) which gives the 12-MAV for the selected month.


The Island of Lanai provides the Commission with the most current and complete Island-wide water use reporting in Hawaii.

Total Number of Production Wells Number of Production Wells Reporting Usage Percentage Production Wells Reporting Usage
9 9 100%


Total Number of Non-Production Wells Number of Non-Production Wells Reporting Usage Percentage Non-Production Wells Reporting Usage
19 17 89%

Below is a chart of reported pumping (click on the chart for details).   

 Lanai Monthly Pumpage Chart - 12 Month Moving Average

Lanai Water Company is current in their reporting through March 31, 2022.