Evaluation of water quality and stability in the drinking water distribution network in the Azogues city, Ecuador

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.

Dataset on the assessment of water quality and water quality index of Ubogo and Egini rivers, Udu LGA, Delta State Nigeria

“…This involves the floating of a cork material in the lotic water at a given time and the current velocity was calculated in m/s using the formula: where implies current velocity, is the distance, and is time parameter. Related researches on water quality and its assessment are not limited to the following [1] , [2] , [3] , [4] , [5] , [6] , [7] , [8] , [9] , [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] .…”

Effect of Residual Chlorine on Copper Pipes in Drinking Water Systems

“…At chlorine concentrations of 2 mg/L and 5 mg/L, a greater copper release was generated. Chlorine concentrations between 0.3 to 0.7 mg/L are commonly found in the drinking water distribution network [45]; at this range, the copper concentration released is in the range of 180 to 220 µg/L, which is within the dissolved copper limits recommended by WHO (2004) [60].…”

“…The free chlorine concentration was in the treatment plant (filtration 0 mg/L and storage tanks 0.85 mg/L); in the house (corrosion test rack 0.37 mg/L). The water used for all the trials was the same drinking water that is distributed in the Azogues city, whose physicochemical characteristics were presented by [45].…”

“…The aggressiveness of the water in Azogues, Ecuador was defined using the Langelier, Ryznar Puckorius indexes [45,46]. In the calculation of these indices, other parameters that can also influence the corrosive processes were not included.…”

Development of Water Quality Indices (WQIs): A Review

“…Practical examples of this scenario are water classification scales developed by Luzati and Jaupaj [3], Hamid et al [54], Guettaf et al [60], Vatkar et al [89], Kalyani et al [90], and Shah and Joshi [91]. Zhao et al [20], Abtahi et al [57], García-Ávila et al [63], Al-Janabi et al [92], and Al Obaidy et al [93] attempted to resolve the problem by minimizing the difference between classes to a decimal fraction. Although the problem has been minimized, the fact remains that the categorization schema does not accommodate all the achievable index scores.…”