Related by context. Frequent words. (Click for all words.) 58 shallow aquifer 57 Floridan aquifer 56 groundwater aquifers 56 aquifers 55 Floridan Aquifer 55 Ogallala aquifer 55 recharge groundwater 54 reservoirs 54 Aquifers 53 brackish 53 sewage effluent 53 reservoir 52 saline aquifers 52 aquifer 52 underground aquifer 52 water 52 silts 52 groundwater 52 underground aquifers 51 streambanks 51 Reverse osmosis 51 miscible 50 wellfields 50 tributary rivers 50 freshwater 50 naturally occurring arsenic 50 dissolved solids 49 ponded 49 Coalbed methane 49 undrained 49 sumps 49 naturally occurring mineral 49 Septic tanks 49 aquifer recharge 49 forebay 49 peat swamps 49 artesian wells 49 brackish water 49 irrigating crops 48 basins 48 wastewater effluent 48 deplete oxygen 48 aquatic invertebrates 48 coulees 48 seawater 48 evaporation ponds 48 Fork Reservoir 48 fertile soils 48 muds 48 amphipods 48 diked 48 reverse osmosis desalination 48 arsenic concentrations 48 coalbed methane wells 48 decaying vegetation 48 hydrothermal fluids 48 salinization 48 sargassum 47 dewatered 47 absorbs carbon dioxide 47 silty 47 ponds 47 wastewaters 47 freshwater habitats 47 sandy soils 47 saltwater 47 magma chamber 47 shallower depths 47 effluence 47 streambeds 47 Warragamba Dam 47 Snake Plain Aquifer 47 Horizontal drilling 47 intertidal zone 46 groundwater basin 46 freshwater marshes 46 salination 46 drainfield 46 Odd numbered addresses 46 tidal waters 46 Lake Lavon 46 sediment 46 Ruedi Reservoir 46 deionized water 46 acidic soils 46 polluted groundwater 46 basin 46 frac fluids 46 groundwater withdrawals 46 Raised beds 46 creek bottoms 46 methane CH4 46 geologic formations 46 placer deposits 46 freshwater marsh 46 Marcellus shale formation 46 tailing ponds 46 total dissolved solids 46 wellfield 46 tannic acid 46 feedwater