Related by context. Frequent words. (Click for all words.) 58 aquifer 57 aquifers 54 groundwater 52 underground aquifers 47 nutrient pollution 47 irrigated 46 irrigating 46 prolonged drought 45 reservoirs 44 Groundwater 43 groundwater contamination 43 irrigation 43 water 43 depletion 43 overgrazing 43 wastewater 43 droughts 43 irrigate 43 arid regions 43 river basin 43 Aquifer 42 salinity 42 desertification 42 sewage spills 42 seepage 42 sewage overflows 42 septic tanks 41 contaminated groundwater 41 freshwater 41 desalinated water 41 wells 41 River basin 41 lawn watering 41 drought 41 untreated sewage 41 Lake Okeechobee 40 river basins 40 reservoir 40 finite resource 40 sewage 40 environmental degradation 40 chemical fertilizers 40 algae blooms 40 Droughts 40 urban sprawl 39 drought stricken 39 soil erosion 39 Swiftmud 39 headwaters 39 pollution 39 cropland 39 wetlands 39 subsidence 39 Water Supply 39 depleting 39 mgd 39 basin 39 watering lawns 39 coalbed methane 38 wastewater discharge 38 silting 38 treated effluent 38 floodplain 38 septic systems 38 sedimentation 38 sinkholes 38 stormwater 38 Water 38 irrigators 38 basins 37 Wastewater 37 stormwater runoff 37 deforestation 37 rainfall 37 River Basin 37 effluent 37 outdoor watering 37 artesian 37 sewer overflows 37 overfishing 37 riparian 37 siltation 36 dams 36 tributaries 36 hydrologic 36 Irrigation 36 dry spells 36 drainage basin 36 tamarisk 36 polluted 36 wetland 36 arable land 36 Drought 36 raw sewage 36 irrigates 36 semi arid 36 pumping 36 gallons 36 wastewater treatment 36 farmland 36 rapid urbanization