Ключевые слова: apartment, avenues, big city, building, condominium, constructions, contaminated laugh, contaminated water, drain, drinking water, duct, dwelling, engineer, environment, family, for rent, gutter, laugh, municipal wastewater, nature, open sewage, pipe, polluted, pollution, rent, residential building, rotten water, sewage, sewer pipe, sewerage, sewers, stool river, storm, streets, traffic, ulcerated, union, unsafe water, untethered, waste, wastewater, water, water leak, water treatment,