Related by context. Frequent words. (Click for all words.) 61 shallow aquifer 57 picocuries 55 underground aquifer 55 Floridan Aquifer 54 groundwater 53 sewage effluent 53 drywell 52 aquifer 52 dissolved solids 51 tailing ponds 51 groundwater aquifers 51 arsenic concentrations 50 reservoir 50 chlorides 50 outfall pipe 50 aquifers 50 suspected carcinogen 50 tidal waters 50 THMs 50 seawater 50 reactor coolant 50 contaminating groundwater 50 water 50 sediment 49 wellfields 49 outfall 49 picocuries per 49 evaporation ponds 49 Sediment 49 intermittent streams 49 tritium 49 trichlorethylene TCE 49 nitrobenzene 48 Sediments 48 sludges 48 manure pits 48 settling ponds 48 PCBs polychlorinated biphenyls 48 Stormwater runoff 48 sumps 48 coliforms 48 harmful contaminants 48 mg l 47 contaminants 47 Aquifers 47 nitrates 47 Radioactive waste 47 Soil samples 47 total dissolved solids 47 unnamed tributary 47 Hydrogen sulfide 47 embayment 47 Seawater 47 Seepage 47 benzo pyrene 47 seepage 47 tetrachlorethylene 47 dam spillway 47 intertidal zone 47 Lake Lavon 47 corrosives 47 dredge spoils 47 Conemaugh River 46 carbonic acid 46 sediments 46 feedwater 46 carbon tetrachloride 46 wellfield 46 Elevation normal 46 Raw sewage 46 radioactive tritium 46 turbidity 46 E coli bacteria 46 corroded pipes 46 brine 46 leachate 46 radioactivity 46 magma chamber 46 Turbidity 46 contaminated 46 contaminates 46 stormwater discharge 45 alkalinity 45 silt 45 underground aquifers 45 radioactive contaminants 45 sludge 45 polluted groundwater 45 Tritium 45 silts 45 clarifiers 45 groundwater extraction 45 contaminant 45 inlet 45 maximum contaminant 45 sump 45 fracturing fluids 45 salt crystals 45 brackish water 45 fracking fluid 45 effluent