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Available data

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Continuous data

2 data types available - data from 1991-12-18 to 2026-08-06

Daily data

2 data types available - data from 1968-06-01 to 2026-08-04

Field measurements

2 data types available - data from 1968-05-31 to 2026-07-07

Discrete sample data

723 Observed properties (data types) available - with data from 1969-05-12 to 2026-06-15

144 Sampling activities

Peak measurements

2 data types available - with data from 1969-05-16 to 2025-05-28

Statistical tables for select daily data types

2 data types available - data from 1968-06-01 to 2026-08-04

Important information about this monitoring location

The elevation of this station has been determined to be 1015.23 feet above NAVD 1988. To obtain stream water-surface elevation values in NAVD 1988 add 1015.23 feet to gage height values

Location details and information

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Operated in cooperation with:

Edwards Aquifer Authority

San Antonio Water System

Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	08181400	n/a
Location name	Helotes Ck at Helotes, TX	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	29.5785610755979	n/a
Decimal longitude (WGS84)	-98.6916896315616	n/a
Latitude-longitude method	Interpolated from map	M
Latitude-longitude accuracy	Accurate to + or - 5 sec.	F
District	Texas	48
State	Texas	48
County	Bexar County	029
Country	United States of America	n/a
Altitude of gage/land surface	1015.23 feet	n/a
Method altitude determined	GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System	X
Altitude accuracy	0.06 feet	n/a
Altitude datum	North American Vertical Datum of 1988	NAVD88
Subbasin hydrologic unit	Medina	12100302
Drainage basin		n/a
Date of first construction		n/a
Drainage area	15 square miles	n/a
Contributing drainage area	15 square miles	n/a
Time zone abbreviation	CST	n/a
Site honors Daylight Saving Time	Y	n/a
National aquifer		n/a
Local aquifer		n/a
Local aquifer type		n/a
Well depth		n/a
Hole depth		n/a
Source of depth data		n/a

Monitoring location Helotes Ck at Helotes, TX - USGS-08181400