2017-Discharge-Report

Table 4. (continued)

Domestic/ Stock

Industrial/ Commercial

Year 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

Irrigation

Municipal

Springs

77.4 a/b

253.0 266.5 273.3 261.3 245.9 228.4 237.2 220.3 255.1 259.1 236.0 273.6 247.5 259.9 265.5 257.9 239.5 220.1 247.2 232.6 268.3

12.3 13.4 13.4 13.4 13.4 13.6 13.7 13.8 13.8 13.8 13.8

34.4 41.7 b 42.4 33.8 29.4 32.3 31.7 28.1 34.3 34.5 27.6 28.8 25.7 26.4 23.6 22.6 26.3 22.8 21.9 24.0 22.8

383.9 464.1 456.1 337.5 529.4 609.9 621.5 622.9 647.1 312.0 620.6 417.1 288.0 490.0 265.2 302.3 232.8 195.4 404.5 545.0 493.0

131.9 a 113.6 106.3 79.0 97.1 79.6 55.4 85.3 149.1 42.5 112.7 108.9 72.7 124.9 90.6 76.3 75.3 42.2

13.5** 13.6** 13.6** 13.6** 13.7** 13.7** 13.9** 13.9** 14.0** 14.0**

54.7 74.1

For period of record 1955–2017: Median 95.6

236.5 215.9

13.6** 13.5**

22.8 24.8

383.9 391.5

Mean

101.9

For period of record 2007–2017 (last ten years): Median 75.8 252.7

13.7 13.7

23.8 24.5

353.4 363.3

Mean

83.2

251.2

Data source: USGS unpublished report and Edwards Aquifer Authority files (2017). a = Includes estimates from Atascosa County discharge by Edwards Aquifer users. b = Includes estimates from Guadalupe County discharge by Edwards Aquifer users. * = In 1995 USGS revised the method of calculating domestic/livestock pumpage, which significantly decreased the estimates for 1995 and 1996. ** = Revision based on number of new wells permitted annually and discontinuation of Kinney County estimates in total. Differences in totals may occur as a result of rounding.

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20 17 GROUNDWAT E R D I S CHARG E AND U SAG E