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The document summarizes an investigation into the quality of groundwater in an area of Sri Lanka around a university and garbage dumping site. 96 domestic wells were sampled and tested for 14 physical, chemical and biological parameters. The results found that over 95% of wells had pH levels making the water unsuitable for drinking. Other parameters like turbidity, total solids and nitrite levels were also found to negatively impact water quality. Statistical analysis found significant differences in nitrate, nitrite and other contaminant levels between different areas. The study concludes the groundwater in the area is generally not suitable for drinking due to contamination from human activities. Recommendations are made to improve waste management and further study groundwater quality variations.
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- 12. Methods Parameter Method Nitrite concentration Colorimetric method Nitrate concentration UV spectrometric screening method Total iron concentration Phenanthroline method Total hardness EDTA titrimetric method Dissolved oxygen Winkler method Total solids Gravimetric method Heavy metals Atomic absorption spectrometry Chemical oxygen demand Open reflux method Biochemical oxygen demand 5-day BOD test Total Coiform and E.coli Multiple fermentation tube method