Related by context. Frequent words. (Click for all words.) 52 underground aquifers 51 Floridan Aquifer 51 groundwater 51 aquifers 50 evaporation ponds 49 water 49 creeks streams 48 rainwater 48 soils 48 reservoirs 47 streambeds 46 sandy soils 46 aquifer 46 Raw sewage 46 ponds 46 treated effluent 46 groundwater recharge 46 basins 46 sediment 45 dewatered 45 drainage basins 45 artesian wells 45 retention basins 45 aquifer recharge 45 underground aquifer 45 melting snowpack 45 groundwater basin 44 lagoons 44 saturated soils 44 alluvial deposits 44 nutrient rich 44 dissolved solids 44 tributary streams 44 irrigate crops 44 effluent discharge 44 waterbodies 43 upstream reservoirs 43 headwater streams 43 silt 43 effluent 43 creeks rivers 43 liquid manure 43 saltwater intrusion 43 groundwater pumping 43 stormwater retention 43 overpumping 43 diked 43 heavily polluted 43 groundwater extraction 43 geologic formations 43 floodwater 42 wellfield 42 untreated wastewater 42 detention basins 42 contaminate groundwater 42 contaminating groundwater 42 wastewater 42 nitrate 42 reservoir 42 snow melt 42 clay soils 42 Sediment 42 fertile soils 42 sandy loam 42 polluted groundwater 42 topsoil 42 potable 42 rainwater runoff 42 Soil moisture 42 Alafia River 42 retention ponds 42 raw sewage 42 glacial till 42 sulphide minerals 41 sediments 41 gravels 41 brackish water 41 nitrates 41 injection wells 41 nutrient runoff 41 Angat Dam 41 livestock manure 41 sumps 41 watersheds 41 alkaline soil 41 tailing ponds 41 hydro lakes 41 irrigated 41 Great Artesian Basin 41 Hydrogen sulfide 41 basin 41 freshwater 41 alluvium 41 brackish 41 sewage 41 desalinated 41 disinfection byproducts 41 calcrete 40 sediment runoff 40 saline 40 aquatic organisms