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July 7, 2026Discover GeoscienceOpen Access

Spatiotemporal dynamics and controlling factors of groundwater arsenic contamination in Murshidabad district of West Bengal

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Randomized trial assesses groundwater arsenic contamination levels in Murshidabad, highlighting seasonal effects and hydrogeochemical patterns.

This study aims to understand the spatiotemporal dynamics and controlling factors of groundwater arsenic contamination in Murshidabad.
Integrated a comprehensive secondary dataset of 15,035 records with seasonal primary field data.
Conducted Mann-Kendall trend analysis to identify annual changes in arsenic concentrations.
Performed spatial analysis and vertical stratification assessments to determine contamination patterns.
Identified arsenic levels peaking at 149.20 µg/L in pre-monsoon, with significant decreases during monsoon and slight recovery post-monsoon.
Notable annual increases in arsenic concentrations were observed (p < 0.05) in six blocks, with Sen’s slopes varying from + 0.271 to + 1.208 µg/L yr⁻ 1.
Groundwater level was found to be the dominant control on arsenic variability, significantly correlated with levels at ρ = − 0.646, p < 0.01.

Doha et al. (2026) studied this question.

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Randomized trial assesses groundwater arsenic contamination levels in Murshidabad, highlighting seasonal effects and hydrogeochemical patterns.