Ключевые слова: alertness, attention, bacteria, bacterium, checking, chemical, concept, concepts, contaminants, contaminated water, dangerous, downpour, drop, examining, faucet, flow, flowing, focus, focus concept, fountain, fresh, freshness, germ, gush, health, healthy lifestyle, hygiene, ideas, jet, legionella pneumophila, magnifier, magnifying glass, norovirus, pathogen, poisonous, public drinking fountain, pure water, purified water, purity, rotavirus, searching, surveillance, unhygienic, virus, water, water jet,