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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2025
210825157004301 4-0800-01 Kualapuu Deep Monitor Well, Molokai, HI
Hawaii volcanic-rock aquifers
East Molokai Volcanic Series, Undifferentiated
East Molokai Volcanic Series, Undifferentiated
LOCATION - Lat 21°08'13.5", long 157°00'33.2" referenced to North American Datum of 1983, Maui County, HI, Hydrologic Unit 20050000, 2 mi east of Kualapuu and 3mi north of Kaunakakai.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 1,530 ft. Upper casing diameter 4 in; top of first opening 930 ft, bottom of last opening 1,530 ft. Drilled basal groundwater monitoring well. Well completed in January 2001. Hole diameter 10 inches. Casing material steel. Casing diameter 4 inches. Sounded depth (2013) about 1,450. Drilled depth 1,585 feet, caved to 1,530 feet before cased.
DATUM - Land-surface datum is 982.29 ft above undefined vertical datum. Measuring point: top of 4 -inch casing, 982.59 ft above Local Mean Sea Level, Feb. 1, 2001 to May. 1, 2010; MARKED ARROW ON TOP OF WELL CAP BRACKET, ON SHORT TAB SIDE (NOT THE LOCKING SIDE), 983.05 ft above Local Mean Sea Level, May. 1, 2010 to present. Measuring point is a marked arrow on the 4-inch aluminum well cap bracket, which is attached to the 4-inch steel inner casing.
PERIOD OF RECORD - February 2001 to August 2002, May 2007 to current year.
PERIOD OF DAILY RECORD - July 2009 to current year.
EXTREMES FOR PERIOD OF RECORD - Highest instantaneous water level, 10.40 feet above mean sea level, February 10, 2020; lowest instantaneous water level, 8.08 feet above mean sea level, September 26, October 12, and October 18, 2012.
WATER-QUALITY RECORDS
WELL CHARACTERISTICS - Depth 1,530 ft. Upper casing diameter 4 in; top of first opening 930 ft, bottom of last opening 1,530 ft. Drilled basal groundwater monitoring well. Well completed in January 2001. Hole diameter 10 inches. Casing material steel. Casing diameter 4 inches. Sounded depth (2013) about 1,450. Drilled depth 1,585 feet, caved to 1,530 feet before cased.
DATUM - Land-surface datum is 982.29 ft above undefined vertical datum. Measuring point: top of 4 -inch casing, 982.59 ft above Local Mean Sea Level, Feb. 1, 2001 to May. 1, 2010; MARKED ARROW ON TOP OF WELL CAP BRACKET, ON SHORT TAB SIDE (NOT THE LOCKING SIDE), 983.05 ft above Local Mean Sea Level, May. 1, 2010 to present. Measuring point is a marked arrow on the 4-inch aluminum well cap bracket, which is attached to the 4-inch steel inner casing.
PERIOD OF RECORD - Specific Conductance profiles have been collected 2001 to present.
INSTRUMENTATION - Water-quality monitor with recorder set to approximately 1-second recording interval. Monitor is trolled over the total depth of the well.
REMARKS - Two specific-conductance and temperature profiles are measured during each water year; one at the end of the dry season (November) and one at the end of the wet season (May).
The CTD is checked against specific-conductance standards. The specific-conductance measurements in the profiles have not been adjusted based on the check measurements, however, the data are available to make adjustments.
Depth is measured using a combination of a marked and calibrated cable and pressure readings from the CTD.
