TY JOUR TI THE MONITORING OF DRINKING WATER QUALITY OF THE CITY OF GROZNY OF THE CHECHEN REPUBLIC KW drinking water KW Grozny KW Chechen Republic KW heavy metals KW water hardness KW ecological state KW maximum permissible concentration KW turbidity of water KW bacterial contamination KW organoleptic qual-ities of water JO Bulletin of KSAU AU Askhabova, K.N. AU Ozdykhanov, M.S. AU Ilkhayeva, Z.S. PY 2017 IS PB Krasnoyarsk State Agrarian University