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USGS Water-Year Summary 2024
340521117212004 001S005W13B004S, Rialto High School Cluster Well at Rialto, CA
California Coastal Basin aquifers
LOCATION - Lat 34°05'21.70", long 117°21'20.41" referenced to North American Datum of 1983, in sec.13, T.1 S., R.5 W., San Bernardino County, CA, Hydrologic Unit 18070203, in West Valley Water District compound, adjacent to Rialto High School, in Rialto.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 440 ft. Upper casing diameter 1.94 in; top of first opening 420 ft, bottom of last opening 440 ft.
DATUM - Land-surface datum is 1,182.03 ft above North American Vertical Datum of 1988. Measuring point: Even level with top of vault, 0.39 ft below land-surface datum, Jan. 3, 2005 to present. “Prior to October 03, 2023, Landâsurface datum is 1181.17 feet above North American Vertical Datum of 1988.”
PERIOD OF RECORD - Water year 2008 to current year.
GAGE - Electronic data logger.
REMARKS - The Rialto High School cluster wells consist of five continuous record groundwater wells, located in a common ground-level vault. The individual stations are well 1S/5W-13B1, station 340521117212001; well 1S/5W-13B2, station 340521117212002; well 1S/5W-13B3, station 340521117212003; well 1S/5W-13B4, station 340521117212004; and well 1S/5W-13B5, station 340521117212005.
PERIOD OF DAILY RECORD - October 2008 to current year.
EXTREMES FOR PERIOD OF RECORD - Highest water level recorded, 260.65 ft below land surface, Feb. 16, 2009; lowest water level recorded, 296.76 ft below land surface on Nov. 4, 2022.
