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Scheduled Maintenance Notice
USGS will be performing maintenance on the time series data processing system beginning at 09:00 EDT on September 10, 2026. During this period, delivery of the latest time series data will be delayed. The maintenance is expected to finish within 2 hours, after which all backlogged time series data will be processed and delivered to WDFN web portals and APIs.

Available data

Select data types to graph from categories based on the way the data were collected.

3 data types available - data from 2003-10-20 to 2026-09-09

3 data types available - data from 2002-11-01 to 2026-09-09

3 data types available - data from 1931-03-17 to 2026-08-20

309 Observed properties (data types) available - with data from 1931-03-17 to 2007-10-10

107 Sampling activities

2 data types available - with data from 2002-12-01 to 2025-03-05

3 data types available - data from 2002-11-01 to 2026-09-09

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Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	02236160	n/a
Location name	SILVER GLEN SPRINGS NEAR ASTOR, FL	n/a
Site type	Spring	SP
Decimal latitude (WGS84)	29.2446986296087	n/a
Decimal longitude (WGS84)	-81.6425766641015	n/a
Latitude-longitude method	Interpolated from MAP.	M
Latitude-longitude accuracy	Accurate to + or - 1 sec.	S
District		125
State	Florida	12
County	Marion County	083
Country	United States of America	n/a
Altitude of gage/land surface		n/a
Method altitude determined		n/a
Altitude accuracy		n/a
Altitude datum		n/a
Subbasin hydrologic unit	Upper St. Johns	03080101
Drainage basin		n/a
Date of first construction		n/a
Drainage area		n/a
Contributing drainage area		n/a
Time zone abbreviation	EST	n/a
Site honors Daylight Saving Time	Y	n/a
National aquifer		n/a
Local aquifer	Floridan Aquifer System	120FLRD
Local aquifer type		n/a
Well depth		n/a
Hole depth		n/a
Source of depth data		n/a