ArticleEnvironmental geochemistry and health2026
Assam's Digaru River under threat: Integrated water quality and human health risk assessment of an industry-laden system through the lens of multivariate statistics and water quality indexing.
Article in Environmental geochemistry and health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
River contamination in India has become a critical issue owing to gross mismanagement of resources, poor planning, and limited understanding of contaminant dynamics. In this context, we conducted a systematic yet comprehensive study of the Digaru River, a tributary of the Brahmaputra River, which has been subjected to untreated municipal and industrial discharges for many decades. We analysed thirty physicochemical water quality parameters through periodic monitoring, focusing on identifying pollution sources and contaminant correlations using multivariate statistics. To assess river health, we employed a novel Modified Entropy-Weighted Water Quality Index (MEWQI) and assessed human health risks associated with it. Based on 144 samples collected over four seasons, the study highlighted strong spatiotemporal variability and limited self-replenishment, with monsoon months showing significantly elevated pollutants, including turbidity (> 500 NTU, mean: 56 ± 104), BOD
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