Abstract
This document presents the physical-chemical parameters with the objective of evaluating and analyzing the drinking water quality in the Azogues city applying the water quality index (WQI) and to research the water stability in the distribution network using corrosion indexes. Thirty samples were collected monthly for six months throughout the drinking water distribution network; turbidity, temperature, electric conductivity, pH, total dissolved solids, total hardness, calcium, magnesium, alkalinity, chlorides, nitrates, sulfates and phosphates were determined; the physical-chemical parameters were measured using standard methods. The processed data revealed that the average values of LSI, RSI and PSI were 0.5 (±0.34), 6.76 (±0.6), 6.50 (±0.99) respectively. The WQI calculation indicated that 100% of the samples are considered excellent quality water. According to the Langelier, Ryznar and Pukorius indexes showed that drinking water in Azogues is corrosive. The quality of drinking water according to the WQI is in a good and excellent category.
Highlights
Table and figure In 30 points of the drinking water network for six months, 176 water samples were collected, stored and transferred to the lab using standard methods and the drinking water quality; turbidity, pH, temperature, total dissolved solids, total hardness, calcium hardness, alkalinity, nitrate, phosphate, chloride, sulfate and free chlorine were measured
Alkalinity, total hardness and calcium hardness were measured by titration method; the hydrogen ion concentration, temperature and total dissolved solids were analyzed with the HACH Multiparameter HQ 40d
Turbidity were measured with turbidimeter; nitrate, phosphate, chloride, and sulfate were determined with HACH DR 2500 spectrophotometer, free chlorine were measured with HACH DR890 and compared with internal standards
Summary
The Azogues city is located south of the Republic of Ecuador, its geographic coordinates are: latitude 2° 44'22 "S, longitude: 78° 50'54" W, they cover an area of approximately 1200 km, the average altitude of the city is 2518 m above sea level, the average temperature is 17 °C.
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