San Simon Sub-Basin - Arizona Department of Environmental Quality

Table of Contents
Abstract .................................................................................................................................................................... 1
Introduction ............................................................................................................................................................. 2
Purpose and Scope ...................................................................................................................................... 2
Physical and Cultural Characteristics.......................................................................................................... 4
Hydrology................................................................................................................................................................. 6
Geology ...................................................................................................................................................... 6
Aquifers ...................................................................................................................................................... 6
Groundwater Recharge and Discharge ....................................................................................................... 7
Groundwater Movement, Storage and Levels .......................................................................................... 12
Groundwater Sampling Results ........................................................................................................................... 12
Water Quality Standards ........................................................................................................................... 12
Water Quality Standards Exceedances...................................................................................................... 13
Suitability for Irrigation ............................................................................................................................ 13
Analytical Results .................................................................................................................................... 13
Groundwater Composition ................................................................................................................................... 24
General Summary ..................................................................................................................................... 24
Groundwater Chemistry ............................................................................................................................ 24
Overall Constituent Co-variation .............................................................................................................. 24
Aquifer Constituent Co-variation.............................................................................................................. 29
Groundwater Quality Patterns............................................................................................................................. 30
Spatial Variation ....................................................................................................................................... 30
Co-variation with Groundwater Depth...................................................................................................... 30
Co-variation with Well Depth .................................................................................................................. 30
Isotope Comparison................................................................................................................................... 38
Conclusions ............................................................................................................................................................ 39
Suitability of Groundwater for Domestic Use .......................................................................................... 39
Overall Groundwater Quality.................................................................................................................... 39
Aquifer Groundwater Quality .................................................................................................................. 40
Study Design and Data Evaluation............................................................................................................ 42
References .............................................................................................................................................................. 43
Appendices
Appendix A – Basic Data on Sample Sites ............................................................................................... 45
Appendix B – Groundwater Quality Data ................................................................................................. 49
Appendix C – Investigation Methods........................................................................................................ 67
Appendix D – Data Evaluation.................................................................................................................. 71
V