Impact of raw water turbidity fluctuations on drinking water quality in a distribution system

The concentrations of suspended particles were measured in the drinking water of two distribution systems, and the nature of these particles documented. The concentrations of particulate matter were invariably found to be small (maximum 350 μg/L). They are globally in the very low range in comparison with dissolved matter concentrations, which are measured in several hundreds of mg/L. Except during special water quality events, such as turnover of the raw water resource, results show that organic matter represents the most important fraction of suspended solids (from 40 to 76%) in treated and distributed water. Examination of the nature of the particles made it possible to develop several hypotheses about the type of particles penetrating Montreal's distribution system during the turnover period (algae skeleton, clays). These particles were found to have been transported throughout the distribution systems quite easily, and this could result in the accumulation of deposits if their surface charge were ever even slightly destabilised, or if the particles were to penetrate the laminar flow areas that are fairly typical of remote locations in distribution systems.

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An Assessment Of Drinking Water Quality In Parts Of Skudai, Johor Bahru

Jurnal Teknologi ◽

10.11113/jt.v20.1061 ◽

1992 ◽

pp. 1-9

Author(s):

Ir. Abd. Rasid Othman Othman ◽

Mohd Asri Mohd Nor ◽

Azmi Aris ◽

Teng Keat Hui ◽

Jagjit Singh Jora Singh

Keyword(s):

Water Quality ◽

Drinking Water ◽

Distribution System ◽

Treatment Plant ◽

Drinking Water Quality ◽

World Health ◽

Piped Water ◽

Pipe Water ◽

Result Show ◽

Health Organization

In a assessment of drinking water quality in Skudai Johor Bahru, piped water samples in the distribution system from three different standpipe locations in Taman Sri Skudai, Taman Sri Pulai and Universiti Teknologi Malaysia (UTM) campus were collected and tested for selected ions and bacteriological quality. The result show that pipe water supplied from a treatment plant at Gunung Pulai in Pontian was low in mineral content. No Eschericia Coli were detected expected at the UTM Campus with concentration of 3 counts/100 mL in one out of 12 sample tested. Total coliforms were found at each site with concentration ranging from 1 to 13 counts/100 mL in 15 out of 6 samples. Except for the coliforms and the fluoride levels exceeding a little over 1.5 mg/L in 8% of the samples, drinking water in the distribution system in the study area can generally be said to have met the World Health Organization (WHO) guidelines during the study period. However, with the detection of coliforms and E. Coli at the household standpipes, the possibility of the distribution system in Skudai having pathogen contamination from time to time cannot be dismissed. Keywords: drinking water quality

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THE QUALITY OF DRINKING WATER IN SIGHETU MARMAŢIEI, MARAMUREŞ, ROMANIA

Scientific Bulletin Series D : Mining, Mineral Processing, Non-Ferrous Metallurgy, Geology and Environmental Engineering ◽

10.37193/sbsd.2017.2.03 ◽

2017 ◽

Vol 31 (2) ◽

pp. 19-25

Author(s):

Valeria Mirela Brezoczki ◽

◽

Gabriela Maria Filip ◽

Keyword(s):

Water Quality ◽

Drinking Water ◽

Distribution System ◽

Water Distribution ◽

Water Source ◽

Raw Water ◽

Water Quality Control ◽

Baia Mare ◽

Drinking Water Distribution

This paper presents the analysis of the quality indicator of a subterranean raw water source, captured in Crăciunesti, Sighetu Marmatiei, followed by the description of the technological flow of capturing and chlorinating water with the aim of making it drinkable, and the analysis of the obtained values of the physical, chemical and bacteriological indicators. The period within which water quality was monitored for this paper covers four months (December 2016, March, April and May 2017). Within this period the analyses regarding water quality control were carried out by the laboratory of the Water Treatment Baia Mare. The analysis of the obtained results highlighted a series of problems regarding the existence of certain indicators/parameters with values above the legally admissible threshold with regard to water quality. The manganese found in raw water exceeds the admissible threshold by 160%, in December 2016, and by 120% in March 2017, but it is within limits during the months of April and May. The occurrence of colonies developed at 37 °C and 22°C in the raw water requires chemical treatment of the raw water aimed at disinfecting it. The parameters of drinking water correspond to the values admissible through the laws in force, the water being distributed to the consumers through the Drinking water distribution system in Sighetu Marmatiei.

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