Development of a dairy cattle drinking water quality index (DCWQI) based on fuzzy inference systems

► This is a fuzzy-based index for assessment of animal drinking water quality. ► Critical quality parameters for animal and human health are included in the index. ► The index can handle the uncertainties surrounding water quality issues. ► The index developed seems useful for assessment of animal drinking water quality. ► It can be used for routine assessment of water quality regarding animal drinking.