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Determination of Drinking Water Quality: a Case Study on Saline Prone South-west Coastal Belt of Bangladesh

T. K. Das*
Department of Environmental Science & Technology, Jessore Science & Technology University, Jessore-7408, Bangladesh.

M. Choudhury
Department of Environmental Science & Technology, Jessore Science & Technology University, Jessore-7408, Bangladesh.

M. Sultana
Department of Environmental Science & Technology, Jessore Science & Technology University, Jessore-7408, Bangladesh.

Abstract/ Executive Summary:

This research integrates quantitative data of underground and sub-surface sources of drinking water from two coastal union Gabura and Munshiganj of Shyamnagur upazila of Satkhira district. Four drinking water sources have been selected and sampled during dry season when the salinity rate is generally high. A total of 22 water samples have been collected of which 6 from protected pond, 6 from tube well, 6 from rainwater and 4 from pond sand filter (PSF). The average pH of tube well water, protected pond water, pond sand filter water and rain water were 6.59 (±.05), 6.46 (±1.03), 6.60 (±.52), 5.95 (±.87), respectively. The average EC (μs cm^-1) range of tube well water, protected pond water, pond sand filter water and rain water were 2059.16 (±49.43), 1756 (±14), 769 (±94.27), 64.33(±59.91) while the TDS (ppm) range were 1319.97 (±31.69), 1125.64 (±913.46), 492.94 (±60.43) and 15.38 (±118.59) respectively. The maximum concentration of salinity was found in tube well water which was 1.37 (±53) ppt. Most of the protected ponds were highly contaminated with sulphate and it ranges from 84.64 to 218.25 ppm. The average number of fecal Coliform in protected ponds were 1650 100 m l^-1 of water while in PSF source pond 2350 100ml^-1 and collection point 1.5 100ml^-1.

Keywords: Climate change, Ground water, Rainwater, Surface water, Water quality

Location: Gabura and Munshiganj union of Shyamnagur upazila of Satkhira district

Start Date: 00-12-2012

End Date:

Program Area: Quality and Nutrition

Commodity: Water quality

Objectives:

This research was targeted to determine the water quality of surface and ground water sources. This research will help policy makers to find out suitable drinking water source for the coastal people.

Methodology:

Twenty two water samples were collected from Gabura and Munshiganj union of Shyamnagur upazila of Satkhira district which is in the marginal line of coastal zone. The drinking water sources in the two unions are not so available like others. Six samples were collected from each of protected pond, tube well, rain water and four sample from PSF. The water sample were collected in December 2012. The water samples were collected in one liter plastic pot which was previously washed and rinsed three times with sample water. Only for fecal coli form the water sample were collected in 250 ml pot which was preserved in ice box. The PH was measured at the sampling site by Microprocessor pH meter model no. HANNA instrument, pH 211. EC, Salinity and TDS were also measured at the sampling site by Conductivity meter model-HI 8033. The measurement of sodium and potassium were done by flame photometric method model- Flame photometer - PEP7. Total Hardness, Calcium, Magnesium and Bi-carbonate were analyzed by titration colorimetric method and chloride by titration Argenometric method. Nitrate, Phosphate and Sulphate were measured by Turbidimetric method with Spectrophotometer model- Thermospectronic, UVvisible spectrophotometers, helios 9499230 45811. Fecal coliform was count by pore plate culture method (Ramesh and Anbu, 1996). Data were analyzed by Excel 2007 software. SPSS 20 software was used for statistical analysis, such as Pearson Correlation. Pearson Correlation establish relationship between parameters of water quality i.e. whether a parameter increase or decrease with the increase and decrease of other parameters.

Source of Information: J. Environ. Sci. & Natural Resources, 10(1): 101-108, 2017 ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the observation it can be concluded that the concentration of all water quality parameter in harvested rain water were within WHO and BSTI drinking water quality standards but other sources were not so suitable for drinking purpose. Most of the water quality parameter of protected pond, tube well and pond sand filter exceeds WHO and BSTI drinking water quality standards. As the coastal zone is situated in the transition zone of brackish water, the alternative drinking water sources is needed to ensure safe drinking water supply and reduce health risks of coastal people.

Knowledge Management: Journal