Related by context. All words. (Click for frequent words.) 67 E Coli bacteria 65 Fecal coliform 63 Enterococcus bacteria 62 enterococci bacteria 62 fecal coliforms 62 coli bacteria 61 Coliform 61 E coli bacteria 61 total coliform 61 enterococcus bacteria 61 Enterococci bacteria 60 E. Coli bacteria 60 fecal contamination 60 algal toxins 59 faecal contamination 58 nitrate contamination 58 fecal coliform bacteria 58 e coli bacteria 58 microcystins 57 e coli contamination 57 coliforms 57 fecal bacteria 57 faecal coliform 57 remote blackwater streams 57 Arsenic contamination 57 chlorine residuals 57 listeria monocytogenes bacteria 57 Fecal coliform bacteria 57 total coliforms 57 fecal coliform contamination 57 nitrate concentrations 56 nitrate nitrogen 56 Fecal bacteria 56 fecal coliform 56 Fecal Coliform 56 contaminates groundwater 56 dissolved oxygen DO 56 shellfish harvested 56 E.coli contamination 56 Ecoli 56 Upper Vaitarna 56 e.Coli 55 Salmonella Listeria 55 chloride concentrations 55 toxaphene 55 Enterococci 55 faecal bacteria 55 Fecal contamination 55 Resistant bacteria 55 effluents discharged 55 haloacetic acid 55 Coliform bacteria 55 enteric bacteria 54 coliform contamination 54 Nitrate contamination 54 parasite cryptosporidium 54 faecal coliforms 54 toxic algae bloom 54 microcystin 54 potability 54 bacteria listeria monocytogenes 54 Radioactive contamination 54 algal toxin 54 Perchlorate contamination 54 naturally occurring radium 54 bioaerosol 54 E.Coli bacteria 54 e.coli bacteria 53 radioactive isotope iodine 53 Total Coliform 53 measurable tritium 53 bacterial contamination 53 contaminant concentrations 53 Turbidity 53 Enterococcus 53 exceedance 53 chemical malachite green 53 marine biotoxin 53 groundwater withdrawals 53 arsenic contamination 53 contamination 53 pesticide contamination 53 drinking unpasteurised milk 53 chlorine residual 53 Methyl mercury 53 enterococcus 53 shallow aquifers 53 tutin 53 coliform bacteria 53 haloacetic acids 53 coliform 53 turbid water 53 antibiotic residues 53 contaminant 53 alachlor 53 Pong dam 53 bacterium Listeria monocytogenes 53 inorganic arsenic 53 saline intrusion 53 Vibrio parahaemolyticus 53 disinfectant byproducts 52 decaying algae 52 bacteria Listeria monocytogenes 52 THMs 52 atrazine concentrations 52 simazine 52 TTHMs 52 tritium contamination 52 Manchhar Lake 52 HSADL Bhopal 52 arsenic contaminated 52 Scanty rainfall 52 Karnal bunt 52 oil sheens 52 effluent discharged 52 heptachlor 52 colon bacillus 52 Polluted runoff 52 fecal material 52 mercury concentrations 52 dioxin PCBs 52 chlorine disinfectant 52 Brackish water 52 flame retardants PBDEs 52 salmonella typhi 52 Sewage spills 52 Groundwater contamination 52 shellfish harvesting 52 Trihalomethanes 52 microbiological contamination 51 embayments 51 sulfate concentrations 51 San Justo Reservoir 51 contaminated 51 groundwaters 51 waterborne microorganisms 51 recreational shellfish harvesting 51 nitrofuran 51 tetrachlorethylene PCE 51 Lake Loramie 51 trihalomethane 51 naturally occurring arsenic 51 residual chlorine 51 siphonage 51 perfluorochemicals PFCs 51 groundwater aquifer 51 toxin domoic acid 51 E Coli 51 clenbuterol positives 51 Salmonella Enteritidis SE 51 antibiotic residue 51 goose feces 51 non O# STEC 51 enterococci 51 E. Coli contamination 51 E. coli bacteria 51 veligers 51 salinity intrusion 51 pathogenic bird flu 51 unchlorinated water 51 H7 variant 51 organophosphate pesticide 51 listeria salmonella 51 invasive zebra mussels 51 bacteria enterococci 51 discharging untreated 51 fecal indicator 51 bioaerosols 51 spokeswoman Skylar McElhaney 50 freshwater lakes rivers 50 Nitrates 50 contaminate groundwater 50 Intersex fish 50 Contaminated groundwater 50 avian botulism 50 Campylobacter infections 50 phosphorous fertilizers 50 Microcystis 50 discharging effluents 50 intranasal zinc 50 pH alkalinity 50 dioxin Zimpfer 50 pesticide residue 50 bioaccumulates 50 effluent discharge 50 bacteriologically 50 toxic algae blooms 50 Uchchal 50 Coliforms 50 pollutes groundwater 50 biotoxin 50 nitrogen leaching 50 Satluj river 50 arsenic concentrations 50 Hydrogen sulphide 50 fecal chloroform 50 vibrio parahaemolyticus 50 biphenyls 50 ciguatera toxin 50 contaminants leach 50 Largemouth Bass Virus 50 Haystack Reservoir 50 exceedances 50 hydrogen sulfide gases 50 Fecal coliforms 50 vomitoxin 50 Polychlorinated biphenyls PCBs 50 HAAs 50 Thoroughly cooking eggs 50 dechlorinated 50 Chromium VI 50 exceedences 50 Khadakvasla dam 50 Sulfates 50 Pesticide residues 50 mouthwashes containing 50 cyanobacterial blooms 50 chlorine byproducts 50 depleting groundwater 50 phytoplankton zooplankton 50 somatic cell counts 50 nutrient inputs 50 organochlorines 50 Toxic algae 50 Ebola Reston virus 49 vibriosis 49 tetrachloroethene 49 NIV Pune 49 Demand BOD 49 Hydrogen Sulfide H2S 49 selenium concentrations 49 beachwater quality 49 E.coli O# H7 49 trichloroethene 49 heterotrophic bacteria 49 chlordane 49 microscopic larvae 49 perfluorinated chemicals 49 legionella bug 49 Methylmercury 49 Campylobacter bacteria 49 Salmonella spp 49 E.Coli 49 Viral Hemorrhagic Septicemia 49 oysters harvested 49 microbial contamination 49 Total Dissolved Solids 49 ecoli 49 chloride salts 49 toxic algal bloom 49 Salmonella saintpaul 49 phosphates nitrates 49 molds fungi 49 faecal pollution 49 effluent discharges 49 acid sulphate soil 49 atmospheric deposition 49 O# strain 49 Khadakwasla dam 49 borne pathogen 49 Inorganic arsenic 49 endosulfan pesticide 49 turbidity 49 organochlorine 49 E. coli 49 phosphorus concentrations 49 campylobacteriosis 49 pesticide methamidophos 49 molluscan shellfish 49 Discolored water 49 nondetectable 49 nitrates phosphates 49 Cyclospora 49 cryptosporidium parasite 49 pesticide residues 49 wastewater effluent 49 contaminate drinking 49 deplete aquifers 49 legionella bacterium 49 mosquito trapping 49 PCV1 49 herbicide residues 49 unboiled water 49 Domoic acid 49 ciguatera 49 Ugum 49 BSE prions 49 aflatoxin naturally occurring 49 undercooked beef 49 Swine flu viruses 49 Pesticide residue 49 seagull droppings 49 groundwater contaminant 49 tritium concentrations 49 shellfish beds 49 C. perfringens 49 deplete oxygen 49 mussel infestation 49 Pepacton 49 Maliuc 48 TTHM 48 bacteriological samples 48 oversulfated chondroitin sulfate OSCS 48 dichlorvos 48 organochlorine pesticides 48 Abnormal radiation 48 Severe infestations 48 carcinogenic polycyclic aromatic hydrocarbons 48 Hydrogen sulfide 48 H7 strain 48 acid sulphate 48 sulfolane 48 Quagga mussel 48 E coli O# 48 aerially sprayed 48 dieldrin 48 microscopic parasite 48 Cryptosporidium parasite 48 Wreck Pond 48 beachwater samples 48 Enterobacter sakazakii 48 Freshwater mussels 48 salmonella bacterium 48 #,#,# trichloroethane 48 contaminants 48 E. coli Escherichia coli 48 tritium plume 48 undercooked contaminated 48 microbial spoilage 48 Stripe rust 48 contamination Nishiyama 48 carcinogenic dioxins 48 e coli 48 epicenter overflowed 48 sicken humans 48 Tittabawassee River floodplain 48 perfluorooctanoic acid PFOA 48 listeria monocytogenes 48 EHEC bacteria 48 patulin 48 ponded 48 Cryptosporidiosis 48 benzene ethylbenzene 48 H5 avian flu 48 golden alga 48 Clostridium botulinum spores 48 estrogenic compounds 48 northern leopard frogs 48 freshwater aquifer 48 turbidity cloudiness 48 nitrates nitrites 48 drinking unpasteurized milk 48 E. Coli 48 Vibrio bacteria 48 potato wart 48 Chlordane 48 benzene contamination 48 chemical diethylene glycol 48 trichloroethene TCE 48 chemical bromate 48 Dieldrin 48 Dongling smelter 48 Mtera dam 48 Avian botulism 48 vibrio bacteria 48 prenatal exposures 48 PFOA concentrations 48 acid sulfate 48 colorless odorless radioactive 48 naturally occurring fluoride 48 spore forming bacteria 48 hydrous 48 Sulphur dioxide 48 benzene toluene ethylbenzene 48 domoic acid 48 trihalomethanes THMs 48 undercooked meats 48 fecal coli 48 freshwater swamps 48 hot peppers jalapenos 48 E. coli contamination 48 bacterium Mycobacterium 48 high flavanol cocoa 48 pH acidity 48 arsenic barium 48 plantlike bacteria 48 nutrient loadings 48 E.coli bacteria 48 low pathogenic strain 48 brucellosis infections 48 eucalyptol 48 benzopyrene 48 pathogenic E. coli 48 microbiological contaminants 48 Skylar McElhaney spokeswoman 48 Hirakud dam 48 Matthew Rodell 48 dichloroethene 48 PAHs polycyclic aromatic hydrocarbons 48 discharging effluent 48 triclocarban 48 dieoff 48 microbiological organisms 48 methyl mercury 48 wetland vegetation 48 Aflatoxin 48 vibrio parahaemolyticus bacteria 48 arsenic selenium 48 causes Legionnaire disease 48 Salmonella Schwarzengrund 48 clams mussels oysters 47 shigella bacteria 47 PAH concentrations 47 carcinogenic benzene 47 Danube delta 47 Wachusett reservoirs 47 harmful contaminants 47 Amur river 47 Mehedinti county 47 fed distiller grain 47 cancer causer 47 Palos Verdes Shelf 47 H#N# HPAI 47 total dissolved solids 47 Shigella bacteria 47 antibiotic chloramphenicol 47 contaminating groundwater 47 PFBA 47 low pathogenic H#N# 47 pathogenic avian influenza 47 radionuclide detection 47 leaky septic tanks 47 shallow aquifer 47 underprocessed 47 floodwater recedes 47 pesticide herbicide 47 Rawal Dam 47 chlorine disinfection 47 deformed beaks 47 hydrologically 47 salmonella montevideo 47 azinphos methyl 47 groundwater depletion 47 polychlorinated biphenyls PCB 47 Wickiup Reservoir 47 ozone particulate matter 47 phosphorus pollution 47 untreated effluent 47 pesticide atrazine 47 coliform organisms 47 Clostridium botulinum toxin 47 E.coli 47 Cohansey aquifer 47 detectable residues 47 Kotri barrage 47 Gary Erbeck director 47 contain tetrodotoxin 47 Algae blooms 47 dichlorobenzene 47 Bacillus cereus 47 waterborne parasites 47 Obleski 47 foodborne pathogen 47 genetically mutate 47 E coli contamination 47 toxins leaching 47 irrigable 47 stormwater discharges 47 rabbit droppings 47 ghariyals 47 V. parahaemolyticus 47 elevated PBDE 47 hormone disruptor 47 bays estuaries 47 brucellosis tuberculosis 47 BSE infectivity 47 Trichloroethylene TCE 47 Ciguatera 47 Dole Earthbound Farm 47 Agua Hedionda 47 Manchar Lake 47 brodifacoum 47 e.coli 47 algal bloom 47 acute toxicity 47 cow rumen Naczi 47 catfish eel 47 aphid infestations 47 H5 strain 47 parasite Cryptosporidium 47 mutagenicity 47 undercooked shellfish 47 denaturing gradient gel electrophoresis 47 produce briny wastewater 47 enterohaemorrhagic E. coli 47 bedrock aquifers 47 polychlorinated 47 Bluetongue virus 47 pathogenic organism 47 Ponding 47 coli O# 47 Koyna Dam 47 zinc orthophosphate 47 Bhatsa 47 Dazhu 47 vibrios 47 food borne pathogen 47 sulfated chondroitin sulfate 47 methamidophos 47 cyanobacteria blooms 47 tetrachloroethene PCE 47 Salmonella serotype Saintpaul 47 quaggas 47 polluting groundwater 47 irrigating crops 47 Stormwater runoff 47 groundwater 47 airborne pollutant 47 macroinvertebrate 47 Srisailam dam 47 carcinogen benzene 47 waterbody 47 Legionella bacterium 47 biosolids compost 47 Banklick Creek 47 nitrofurans 47 unapproved genetically engineered 47 Shihmen Reservoir 47 Sluice gates 47 clostridium botulinum 47 Hepatitis E 47 Bamboo flowering 47 bacterium Pseudomonas 47 soils sediments 47 invasive alga 47 bourne diseases 47 polychlorinated biphenyl PCB 47 microbiological sampling 47 Chilika lake 47 Clostridium Botulinum 47 Shopper Events specializes 47 amoeba Naegleria fowleri 47 full blown haemolytic 47 Fecal matter 47 chlorinated solvent 47 Kasargode district 47 trichloramine 47 mussels snails 47 Salmonella Saintpaul strain 47 phosphorus nutrient 47 Siltation 47 salinisation 47 brevetoxin 47 trans palmitoleate 47 stormwater overflows 47 Board UPPCB 47 highly pathogenic H#N# strain 47 toxic algae 47 iodine isotopes 47 PCBs mercury 47 Hooghly Howrah 47 Vesivirus 47 toxin microcystin 46 leaking septic tanks 46 ammonia nitrogen 46 sumithrin 46 epizootic hemorrhagic disease 46 Almatti 46 mussel harvesting 46 Sedimentation 46 Anabaena 46 Infected mosquitoes 46 PBDE contamination 46 contaminate shellfish 46 E. coli STEC 46 barium chromium 46 overflowing sewage 46 underwater obstructions 46 Bhavnagar Amreli 46 airborne particulates 46 dissolved oxygen levels 46 reservior 46 dichloroethane 46 bacterium Clostridium 46 detectable BPA 46 campsite uninhabitable 46 campylobacter infection 46 Dongting 46 legionella bacteria 46 scanty rains 46 atrazine herbicide 46 Arunachal Pradesh Assam 46 TCE vapors 46 polychlorinated PCBs 46 PFCAs 46 vibrio vulnificus 46 bioaccumulative 46 chlorinated hydrocarbon 46 coli salmonella 46 weed infestation 46 paddy transplantation 46 Enterobacter cloacae 46 highly pathogenic virus 46 airborne soot 46 hazardous substances pollutants 46 benzoates 46 herbicide Atrazine 46 Harmful algal blooms 46 Little Assawoman Bay 46 Elevated arsenic 46 diarrhea abdominal cramps nausea 46 nitrate poisoning 46 Crimean Congo Haemorrhagic Fever 46 rodent borne diseases 46 E. coli O# [001] 46 Saintpaul 46 Domoic acid neurotoxin 46 macroinvertebrates 46 contaminents 46 Untreated sewage 46 saxitoxin 46 Avian Influenza H#N# 46 H7 bird flu 46 contaminations 46 Upper Floridan Aquifer 46 disinfection byproducts DBPs 46 geese droppings 46 Beeds Lake 46 nutrient discharges 46 dissolved oxygen pH 46 E coli 46 Dissolved Oxygen 46 Previous observational studies 46 ammonium nitrogen 46 manure spills 46 endrin 46 Palar river 46 mercury contamination 46 organochlorine pesticide 46 Landslips 46 Delaware Inland Bays 46 vancomycin resistant 46 parvum 46 solvent toluene 46 thiosulphate 46 sylvatic plague 46 Hydrogen Sulfide 46 Goose droppings 46 oligotrophic 46 RapidChek R 46 PRRS virus 46 bacterial contaminants 46 Ukai Dam 46 H7 contamination 46 Himayatsagar 46 Mahim creek 46 subtidal 46 contaminant plume 46 seepages 46 Chlamydophila psittaci 46 Dharoi 46 paradichlorobenzene 46 Fetal heartbeats 46 H7 virus 46 eating undercooked meat 46 Bacterial contamination 46 E. Coli O# H7 46 mosquito pools 46 zebra mussel larvae 46 spokeswoman Tressa Tillman 46 intersex fish 46 Naegleria fowleri 46 Microcystis aeruginosa 46 porpoise vaults 46 plutonium americium 46 Kolhapur Sangli 46 BTV1 46 tritiated 46 Levisa 46 Algal bloom 46 ICE HOUSE RESERVOIR 46 Gangetic dolphins 46 radioactive leakage 46 Radioactive isotopes 46 H5 subtype 46 hormone disrupter 46 downstream Kotri 46 toxic residues 46 ug l 46 Legionella bacteria 46 airborne particulate matter 46 serrano peppers 46 swimmer itch 46 aquatic biota 46 Hadnot Point 46 causes Legionnaires disease 46 Almatti reservoir 46 Epizootic Hemorrhagic Disease 46 benzene carcinogen 46 dockside sampling 46 salmonella infections 46 ethyl glucuronide 46 shellfish poisoning 46 industrial effluents 46 Carrowmore Lake 46 V. vulnificus 46 Fine particulates 46 methyl tert butyl ether 46 Pesticide Residue 46 Wales NPHS 46 Elephant Butte Reservoir 46 MBTE 46 aldrin 46 Escherichia coli E. coli 46 cryptosporidiosis 46 cryptosporidium 46 hypoglycin 46 detectible 46 acetochlor 46 raw sewage discharges 46 sedimentation ponds 46 Head Marala 46 mildly acidic 46 e Coli 46 Anand Kheda 46 Sewage overflows 46 allergenic proteins 46 petroleum hydrocarbons 46 Dehalococcoides 46 infectious prions 46 foodborne infections 46 PCBs dioxins 46 downgradient 46 acanthamoeba 46 Columnaris 46 Koi Herpes Virus 46 malachite green 46 coli 46 DDT dieldrin 46 Gnangara Mound 46 detected 46 bioaccumulation 46 magnesium carbonate 46 Thoroughly cooking 46 powerful neurotoxin 46 river catchments 46 Kaladera 45 toxic effluents 45 iodine deficient 45 toxic polychlorinated biphenyls 45 Ascochyta 45 harmful algae blooms 45 Cryptosporidium parvum 45 pelicans turtles 45 groundwater contamination 45 barges ballast 45 toxic hydrogen sulfide 45 B. cepacia 45 Microbiological 45 Thi Vai River 45 salmonella listeria 45 disinfections 45 carcinogenic substance 45 zebra mussel infestation 45 assimilative capacity 45 Hammonasset River 45 epidemiologically linked 45 overflowing septic tanks 45 cocaine alkaloid 45 unintentional ingestion 45 campylobacter bacteria 45 UPPCB 45 endocrine disrupting compounds 45 LPAI H#N# 45 Ebola Reston 45 discharged untreated wastewater 45 elevated radon 45 foothills bordered 45 radium naturally occurring 45 toluene benzene 45 IKAROS alterations 45 dioxin concentrations 45 endosulphan 45 pesticide carbofuran 45 desalted 45 karnal bunt 45 clinical mastitis 45 airborne mold spores 45 E.coli O# 45 groundwater aquifers 45 borne pathogens 45 H5 avian influenza 45 aquatic invertebrate 45 Desilting 45 Cotinine 45 dichloro 45 Dennis Fewless 45 waterborne pathogens 45 pesticides chlorpyrifos 45 attracting vermin 45 inadvertently puncturing 45 fecally contaminated 45 E.coli bacterium 45 PCBs pesticides 45 dioxane 45 Sodium cyanide 45 Aedes breeding 45 spokeswoman Clair Boatwright 45 Salmonella contamination 45 Listeria bacteria 45 selenium poisoning 45 Thatta Badin 45 Chlorination 45 phthalate metabolites 45 inactivate viruses 45 undercooked hamburger 45 sewage effluent 45 Listeria infection 45 microbial degradation 45 salmonella strain 45 insecticide malathion 45 sewer outfalls 45 TCE trichlorethylene 45 ruminant feed 45 pseudorabies 45 Betsy Mallison spokeswoman 45 Zazac 45 Seveso Italy 45 trans Ganga 45 bathing beaches 45 anomalous radon 45 biosecurity breaches 45 Dear EarthTalk Are 45 DBPs 45 Retesting 45 Leptospira 45 accompanying Danelo 45 Shiranui Sea 45 NO3 N 45 low pathogenic avian 45 benzo pyrene 45 Listeria monocytogenes bacteria 45 estrogen mimicking 45 Viral Hemorrhagic Septicemia VHS 45 nitrobenzene 45 erode tooth enamel 45 vancomycin resistant enterococci 45 Bt toxin 45 Contaminants 45 stormwater outfalls 45 leaky septic 45 PCBs polychlorinated biphenyls 45 Serologic 45 semicarbazide 45 intestinal infections 45 Listeria Monocytogenes 45 Avian influenza H#N# 45 Neisseria meningitides 45 Clostridium perfringens 45 sow paddy 45 Volatile Organic Compounds VOCs 45 macro invertebrate 45 Pseudo nitzschia 45 Chlorpyrifos 45 Maximum Contaminant Levels 45 organophosphate insecticide 45 enterohaemorrhagic E. coli EHEC 45 Gwalior Jabalpur 45 eutrophic 45 Songhuajiang River 45 Kafue River 45 Ochratoxin 45 gender bending chemicals 45 Seepage 45 undercooked poultry 45 Perchlorate 45 insect repellent DEET 45 schistosome 45 Legionella pneumophila 45 O# H7 45 headwater stream 45 sulfur dioxide nitrogen dioxide 45 TCE PCE 45 recontaminated 45 estrogenic chemicals 45 microbiological testing 45 beachwater pollution 45 toxicosis 45 Elevated contaminant levels 45 plausible explanation CAS 45 Highly pathogenic avian influenza 45 malodour 45 Elevated mercury 45 salmonella enteritidis 45 chemically contaminated 45 Equine herpes 45 toxic alga 45 erosion sedimentation 45 Dorena Reservoir 45 hexavalent chromium contamination 45 itch mite 45 benzenes 45 environmentalist Adrienne Esposito 45 desilted 45 Soil erosion 45 perfluorinated compounds 45 low pathogenic H5 45 largemouth bass northern pike 45 chemical residues 45 PCBs DDT 45 dissolved salts 45 methylhexanamine 45 diarrhea cramps nausea 45 PFOAs 45 diazinon malathion 45 suspected carcinogen 45 naturally occurring algae 45 sodium magnesium 45 weevil infestation 45 Contamination 45 polluted stormwater runoff 45 Cyanobacteria 45 influenza A/H#N# virus 45 columnaris 45 Radioactive Iodine 45 waterfowls 45 carbon monoxide particulate matter 45 salmonella typhimurium 45 Board CGWB 45 discharging wastewater 45 toxic algal blooms 45 leach toxins 45 contaminate aquifers 45 para dichlorobenzene 45 Thorough cooking kills 45 Palsana 45 Kawkawlin River 45 E. coli strain 45 chikunguniya 45 sewage discharges 45 sulfur fumes 45 oysters shrimp crabs 45 fine particulate pollution 45 Artibonite river 45 H5NI virus 45 DuPont DeLisle plant 45 ciguatera fish 44 greenbugs 44 Carbon monoxide CO 44 Creatinine 44 hazardous solvents 44 Hindon river 44 adulterant 44 dioxin TCDD 44 radionuclide contamination 44 cladophora 44 Tahquamenon River 44 Bholakpur 44 Inert ingredients 44 degreasing agent 44 HN# [002] 44 campylobacter salmonella 44 ethylene dibromide 44 Yersinia enterocolitica 44 Masato Ishikawa 44 dechlorination 44 Asian carp DNA 44 brominated compounds 44 Manchar 44 rodent burrows 44 filter impurities 44 salmonella bacteria 44 Salmonella Campylobacter 44 PCB resuspension 44 backwashing 44 salinization 44 EEE virus 44 waterbodies 44 MtBE 44 Shigella dysentery 44 simian foamy virus 44 potent carcinogen 44 vesicular stomatitis 44 Sparta aquifer 44 beachwater 44 purity potency 44 giardia 44 Umiam 44 cfu 44 Giardia parasite 44 Salmonella enteritidis 44 perchlorate plume 44 diarrhea typhoid 44 microbiologically 44 RWIs 44 saline groundwater 44 wastewater discharges 44 Bacillus Thuringiensis 44 carbamate insecticides