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2000
Volume 21, Issue 8
  • ISSN: 1573-4110
  • E-ISSN: 1875-6727

Abstract

Background

Water quality assessment is a crucial task to manage water sources and control water pollution. The purpose of this study is to develop a Groundwater Quality Index (GWQI) to assess groundwater quality.

Methods

The GWQI was developed and functioned by weight (w) and sub-index (q) of ten selected water quality parameters. Principal Component Analysis (PCA) was applied to a water quality monitoring data set (year 2016 to 2019, 163 samples) at 27 locations in Quang Tri province, aiming to identify the weight of each parameter. Sub-index linear function was established based on the allowable limits for each parameter defined in the National Technical Regulation on drinking water quality. Multiplicate (GWQI), additive (GWQI), and reference (GWQI) formulas were used to compute the final GWQI indices. The sensitivity and suitability of the proposed GWQI in water quality evaluation were also tested.

Results

Among the three GWQI calculation methods, GWQI was found to be the most suitable in reflecting groundwater quality in the study area. From 2019 to 2022 (152 samples), in the province, 63.2% of GWQI values were classified as EXCELLENT or GOOD, 17.1% as POOR, and 19.7% as VERY POOR, or UNFIT FOR DRINKING.

Conclusion

This improved GWQI can be applied to assess groundwater quality at local or regional scales.

© 2025 Bentham Science Publishers
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A Groundwater Quality Index Proposed for Assessment of Groundwater Quality: A Case Study of Quang Tri Province, Central Vietnam
Current Analytical Chemistry 21, 1013 (2025); https://doi.org/10.2174/0115734110324144240924114752
/content/journals/cac/10.2174/0115734110324144240924114752
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  • Article Type:     Research Article
Keyword(s): groundwater; Groundwater quality index; principal component analysis; quang tri province; sub-index linear function; water quality assessment; water quality parameters; weight

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