A comparative study of water quality using two quality indices and a risk index in a drinking water distribution network

This study compares the Canadian Council Water Quality Index (CCME WQI) and Arithmetic (WAWQI) methodologies for determining quality of water in city Azogues (Ecuador). Additionally, a drinking risk index (IRCA) was determined to evaluate degree disease occurrence related consumption. The data generated came from analyses twelve physicochemical parameters (pH, turbidity, colour, total dissolved solids, electrical conductivity, hardness, alkalinity, nitrates, phosphates, sulfates, chlorides, residual chlorine) 172 samples over six months. calculated average value CCME WQI (97.59 ± 1.08) indicates that 100% system ‘excellent’ quality. WAWQI be 26.36 1.13 indicating 16.67% distribution 83.33% ‘good’ IRCA all zones is between 0 5% therefore, distributed considered suitable human consumption rated at no-risk level. Furthermore, influenced by with low maximum allowed concentration (for example, turbidity 1 NTU Ecuadorian standard used instead 5 recommended WHO); conversely, CCME-WQI high (no parameter exceeded norm this study). support instrument guarantee supplied provider companies complies characteristics established water.