Assessment of Groundwater Quality in Phanom Sarakham District, Chachoengsao Province, Using Groundwater Quality Index
Keywords:
Groundwater Quality Assessment, Groundwater Quality Index, Phanom Sarakham DistrictAbstract
This research is a survey-based study aimed at investigating the chemical and toxic characteristics of groundwater in Ban Song and Tha Than subdistricts, Phanom Sarakham district, Chachoengsao province. It also seeks to assess groundwater quality using the Groundwater Quality Index (GWQI) across 16 parameters, in accordance with the standards for potable groundwater quality and groundwater quality. Sampling was conducted in March 2023.
The findings indicated that, among the 32 groundwater samples analyzed, 14 samples exhibited chemical characteristics exceeding the standards. Detected concentrations were in the ranges of Fe 1.1 ± 0.0 – 690 ± 17.0 mg/L, F- 1.4 ± 0.1 – 1.8 ± 0.1 mg/L, NO3- 47 ± 3 – 110 ± 10 mg/L, and Mn 0.6 ± 0.1 – 8.2 ± 0.1 mg/L. Regarding toxic characteristics, one sample exceeded the standards, with Ni detected at 0.0280 ± 0.0007 mg/L. Groundwater quality assessment using the Groundwater Quality Index (GWQI) revealed that the majority of the samples (n = 30) were classified as having very good quality, suitable for consumption, with GWQI values ranging from 0.04 to 21.67. However, one sample was classified as good quality (GWQI = 32.34), while another was classified as poor quality (GWQI = 59.30).
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