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2022 Groundwater Status Reports
December 2022 Groundwater Levels Status Report
Five aquifer index stations were in low groundwater condition for the production month of December 2022. Kaimuki, Pearl City, Kaluanui, and Waialua are in Caution Status. Punaluu is in Alert Status. The monthly production average for December 2022 was 129.27 million gallons per day.
The Board of Water Supply rainfall index for the month of December 2022 was 64 percent of normal, with an identical 5-month moving average of 64 percent. As of January 3, 2023, the Hawaii Drought Monitor shows zero drought to abnormally dry conditions moving roughly south-southwest and north-northwest across Oahu. The National Weather Service is forecasting above-normal precipitation through March 2023.
Most monitoring wells exhibited stable to slightly decreasing head levels for the month of December, likely reflecting the lower overall groundwater production, combined with the relatively low rainfall for the month. Average monthly production for December 2022 was higher than in December 2021 but similar to the 5-year monthly average.
November 2022 Groundwater Levels Status Report
Five aquifer index stations were in low groundwater condition for the production month of November 2022. Kaimuki, Pearl City, Kaluanui, and Waialua are in Caution Status. Punaluu is in Alert Status. The monthly production average for November 2022 was 135.68 million gallons per day.
The Board of Water Supply rainfall index for the month of November 2022 was 51 percent of normal, with a 5-month moving average of 70 percent. As of November 29, 2022, the Hawaii Drought Monitor shows zero drought to moderate drought conditions moving roughly southwest and northwest across Oahu. The National Weather Service is forecasting above-normal precipitation through February 2023.
Most monitoring wells exhibited stable to increasing head levels for the month of November, likely reflecting the lower overall groundwater production, combined with the lower rainfall compared to the prior month. Average monthly production for November 2022 was lower than in November 2021 but similar to the 5-year monthly average.
October 2022 Groundwater Levels Status Report
Five aquifer index stations were in low groundwater condition for the production month of October 2022. Kaimuki, Pearl City, Kaluanui and Waialua are in Caution Status. Punaluu is in Alert Status. The monthly production average for October 2022 was 136.48 million gallons per day.
The Board of Water Supply rainfall index for the month of October 2022 was 78 percent of normal, with a 5-month moving average of 69 percent. As of November 8, 2022, the Hawaii Drought Monitor shows zero drought to moderate drought conditions moving roughly southwest and northwest across Oahu. The National Weather Service is forecasting above-normal precipitation from November 2022 through February 2023.
Most monitoring wells exhibited stable to slightly decreasing head levels for the month of October, likely reflecting the lower overall groundwater production, combined with the slightly lower rainfall compared to the prior month. Average monthly production for October 2022 was lower than in October 2021 but similar to the 5-year monthly average.
September 2022 Groundwater Levels Status Report
Six aquifer index stations were in low groundwater condition for the production month of September 2022. Beretania, Pearl City, Kaluanui and Waialua are in Caution Status. Kaimuki and Punaluu are in Alert Status. The monthly production average for September 2022 was 143.59 million gallons per day.
The Board of Water Supply rainfall index for the month of September 2022 was 94 percent of normal, with a 5-month moving average of 74 percent. As of October 4, 2022, the Hawaii Drought Monitor shows zero drought to severe drought conditions moving southwest across Oahu. The National Weather Service is forecasting enhanced probabilities for above-normal precipitation between roughly November 2022 through January 2023.
Most monitoring wells exhibited decreasing head levels for the month of September, likely due to the relatively higher overall groundwater production, and the significantly decreased rainfall from the prior month. Average monthly production for September 2022 was approximately the same as the previous year and the 5-year monthly average.
August 2022 Groundwater Levels Status Report
Four aquifer index stations were in low groundwater condition for the production month of August 2022. Kaluanui and Waialua are in Caution Status. Kaimuki and Punaluu are in Alert Status. The monthly production average for August 2022 was 150.92 million gallons per day.
The Board of Water Supply rainfall index for the month of August 2022 was 35 percent of normal, with a 5-month moving average of 69 percent. As of September 6, 2022, the Hawaii Drought Monitor shows abnormally dry to extreme drought conditions moving southwest across Oahu. The National Weather Service is forecasting enhanced probabilities for below-normal precipitation through at least November 2022.
Most monitoring wells exhibited relatively stable to decreasing head levels for the month, likely due to the relatively higher overall groundwater production, and the decreased rainfall compared to the prior month. Average monthly production for August 2022 was approximately the same as the previous year and the 5-year monthly average.
July 2022 Groundwater Levels Status Report
Four aquifer index stations were in low groundwater condition for the production month of July 2022. Waialua is in Caution Status. Kaimuki, Punaluu and Kaluanui are in Alert Status. The monthly production average for July 2022 was 143.76 million gallons per day.
The Board of Water Supply rainfall index for the month of July 2022 was 93 percent of normal, with a 5-month moving average of 72 percent. As of August 2, 2022, the Hawaii Drought Monitor shows abnormally dry to severe drought conditions moving southwest across Oahu. The National Weather Service is forecasting enhanced probabilities for below-normal precipitation through at least November 2022, possibly as late as March 2023.
Most monitoring wells exhibited relatively stable head levels for the month, likely due to the relatively lower overall groundwater production, and the increased rainfall compared to the prior month. Average monthly Production for July 2022 was lower than the previous year and the 5-year monthly average.
June 2022 Groundwater Levels Status Report
Four aquifer index stations were in low groundwater condition for the production month of June 2022. Kaluanui and Waialua are in Caution Status. Kaimuki and Punaluu are in Alert Status. The monthly production average for June 2022 was 143.22 million gallons per day.
The Board of Water Supply rainfall index for the month of June 2022 was 45 percent of normal, with a 5-month moving average of 63 percent. As of July 5, 2022, the Hawaii Drought Monitor shows abnormally dry to severe drought conditions moving westward across Oahu. The National Weather Service is forecasting enhanced probabilities for below-normal precipitation through November 2022.
Most monitoring wells exhibited relatively stable head levels for the month, likely due to the relatively lower overall groundwater production offsetting the low rainfall. Average monthly Production for June 2022 was lower than the previous year and the 5-year monthly average.
May 2022 Groundwater Levels Status Report
Three aquifer index stations were in low groundwater condition for the production month of May 2022. Waialua is in Caution Status. Kaimuki and Punaluu are in Alert Status. The monthly production average for May 2022 was 134.13 million gallons per day.
The Board of Water Supply (BWS) rainfall index for the month of May 2022 was 103 percent of normal, with a 5-month moving average of 76 percent. The National Weather Service (NWS) has noted that a mid-May storm event supplemented rainfall totals for portions of Oahu. This is reflected at some of the BWS rain gauges, primarily in metropolitan Honolulu.
As of June 7, 2022, the Hawaii Drought Monitor shows zero drought to severe drought conditions moving westward across Oahu. The NWS is forecasting enhanced probabilities for below-normal precipitation through November 2022.
Most monitoring wells exhibited relatively stable head levels for the month, likely due to the relatively lower overall groundwater production offsetting varying amounts of rainfall across the island. Average monthly Production for May 2022 was lower than the previous year and the 5-year monthly average.
April 2022 Groundwater Levels Status Report
There were three aquifer index stations in low groundwater condition for the production month of April 2022. Waialua is in Caution Status. Kaimuki and Punaluu are in Alert Status. The monthly production average for April 2022 was 136.83 million gallons per day.
The Board of Water Supply rainfall index for the month of April 2022 was 71 percent of normal, with a 5-month moving average of 110 percent. As of May 3, 2022, the Hawaii Drought Monitor shows severe drought conditions in Leeward Oahu. The National Weather Service is forecasting enhanced probabilities for below-normal precipitation through October 2022.
Most monitoring wells exhibited varying degrees of decreasing head levels for the month, due to the relatively lower rainfall during February, March and April, combined with increasing groundwater production. Average monthly Production for April 2022 was higher than the previous year and the 5-year monthly average.
March 2022 Groundwater Levels Status Report
There were three aquifer index stations in low groundwater condition for the production month of March 2022. Waialua is in Caution Status. Kaimuki and Punaluu are in Alert Status. The monthly production average for March 2022 was 135.29 million gallons per day.
The Board of Water Supply rainfall index for the month of March 2022 was 46 percent of normal, with a 5-month moving average of 104 percent. As of April 5, 2022, the Hawaii Drought Monitor shows abnormally dry to severe drought conditions moving westward across Oahu.
Most monitoring wells exhibited stable to decreasing head levels for the month, likely due to the relatively lower rainfall during March, combined with increasing groundwater production. Average monthly Production for March 2022 was higher than the previous year and the 5-year monthly average.
February 2022 Groundwater Levels Status Report
There were four aquifer index stations in low groundwater condition for the production month of February 2022. Kaimuki, Beretania, Punaluu, and Waialua are in Caution Status. The monthly production average for February 2022 was 132.52 million gallons per day.
The Board of Water Supply rainfall index for the month of February 2022 was 51 percent of normal, with a 5-month moving average of 109 percent. As of March 1, 2022, the Hawaii Drought Monitor shows moderate drought conditions across Oahu. The National Weather Service is forecasting enhanced probabilities for above-normal precipitation between March and June 2022.
Most monitoring wells exhibited slightly decreasing head levels for the month, likely due to the relatively lower rainfall during February. Average monthly Production for February 2022 was higher than the previous year and the 5-year monthly average.
January 2022 Groundwater Levels Status Report
There were three aquifer index stations in low groundwater condition for the production month of January 2022. Kaimuki, Punaluu, and Waialua are in Caution Status. The monthly production average for January 2022 was 123.75 million gallons per day.
The Board of Water Supply rainfall index for the month of January 2022 was 107 percent of normal, with a 5-month moving average of 120 percent. As of February 1, 2022, the Hawaii Drought Monitor shows abnormally dry conditions throughout the island of Oahu. The National Weather Service (NWS) is forecasting above-normal precipitation for February 2022. In addition, due to the present La Nina conditions, NWS is forecasting enhanced probabilities for above-normal precipitation through the winter months and into Spring 2022.
Most monitoring wells exhibited stable head levels for the month, likely due to decreased pumping during the winter season. Average monthly Production for January 2022 was lower than the previous year and the 5-year monthly average.
Updated: 12/12/2022