coliform, enterococcus, contaminants, turbidity, arsenic, tetrachlorethylene, nitrates, dieldrin, listeria monocytogenes, chlordane, bromate, bacteria, bacteriological, contamination, enteric bacteria, exceedance, radium, faecal matter, legionella, ecoli, heptachlor, groundwater, chlorination, cyanuric acid, perchlorate, salmonella, tritium, ppb, coli, hydrogen sulfide, toxaphene, dioxane, giardia, bacterial, orthophosphate, fecal matter, effluent, wastewater, chlorine, domoic acid, chloramine, contaminated, carbon tetrachloride, benzene, salmonella enteritidis, cryptosporidiosis, listeria, dioxin, potability, shigellosis, biochemical oxygen demand, chromium, sewage, saxitoxin, sodium hypochlorite, fluoride, toxin, pollutants, cyanobacteria, norovirus, radon, giardiasis, salmonella typhi, vinyl chloride, sanitarian, nitrobenzene, faecal, disinfection, endotoxins, septic, adulterants, trichloroethane, atrazine, leachate, vibrio, sanitizer, microbiological, fecal, arboviruses, daphnia, shigella, water, hydrogen sulphide, backflow, algae, mercaptan, selenium, acrolein, detectible, l. monocytogenes, chloride, simazine, mosquitoes, reinspect, pesticide, phosphorous, phosphorus, furan, cadmium, sediment, pentachlorophenol, carbon monoxide