Click
to
hide
Water-Year
Summary
instructions
and
information
- 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
340606117223802 001S005W11F002S, Lilac Park Cluster Well at Rialto, CA
California Coastal Basin aquifers
LOCATION - Lat 34°06'11.20", long 117°22'39.86" referenced to North American Datum of 1983, in NE 1/4 NW 1/4 sec.11, T.1 S., R.5 W., San Bernardino County, CA, Hydrologic Unit 18070203, in SW 1/4 NW 1/4 sec.11, T.1 S., R.5 W., in Lilac Park, in the city of Rialto.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 714 ft. Upper casing diameter 2 in; top of first opening 694 ft, bottom of last opening 714 ft.
DATUM - Land-surface datum is 1,247.3 ft above North American Vertical Datum of 1988. Measuring point: TOP OF PVC CASING IN VAULT, 0.5 ft below land-surface datum, Jun. 9, 2010 to present. Prior to October 06, 2022 Land-surface datum is 1,247.06 ft above North American Vertical Datum of 1988.
PERIOD OF RECORD - Water year 1996 to current year.
GAGE - Electronic data logger.
REMARKS - The Lilac Park Cluster Wells consist of four continuous record groundwater wells, located in a common ground-level vault. The individual stations are well 1S/5W-11F1, station 340606117223801; well 1S/5W-11F2, station 340606117223802; well 1S/5W-11F3, station 340606117223803; and well 1S/5W-11F4, station 340606117223804.
PERIOD OF DAILY RECORD - Water year 1996 to current year.
EXTREMES FOR PERIOD OF RECORD - Highest water level recorded, 212.38 ft below land surface, May 9, 2000; lowest water level recorded, 309.67 ft below land surface, November 15, 2023.
