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Water quality
Water analysis, Water chemistry
Brackish water, Desalination, Drinking water, Environmental health, Environmental quality, Saline water, Sanitation, Waste water, Water pollution
Science > Hydrology
نوعية المياه (ar), جودة المياه (ar), Calidad del agua (es), Качество воды (ru), Qualité de l'eau (fr)
http://vocabularies.unesco.org/thesaurus/concept190