Risk assessment for non-carcinogenic effect posed by sulfates in water on the health of residents around The Sumpur River, West Sumatra-Indonesia

The extensive agricultural activity contributes to runoff and plays a significant role in elevated sulfate concentrations in many global water bodies. In tropical regions, sulfate pollution and its associated health hazards have intensified, emerging as an international concern. However, these issues are often overlooked despite their potential impact on water and citizen safety. Present study intends to assess the risks posed by sulfate contamination to human health, given its critical implications for water quality in the area. The assessment was conducted through observations in seven water sampling stations established along the Sumpur River and its estuary in Lake Singkarak. The analysis of the collected samples reveals that sulfate concentrations at all locations remain within permissible limits, confirming the water's suitability for consumption. The Sulfate Pollution Index (SPI) values at all sampling locations are below 1, classifying them as unpolluted with respect to sulfate content. Additionally, the Hazard Index (HI) values at all locations were below 1, indicating no significant non-carcinogenic health risks to the public. However, location S5 recorded the highest average HI value, nearing 1 (0.95). One of sampling observations at S5, located near rice fields and settlement areas along the riverbanks, showed a value exceeding 1, which requires attention. Sustainable management of agricultural is crucial for mitigating potential health and dangers sulfate contamination and ensuring the safety of water for consumption in this region. Mitigating sulfate pollution from agriculture and residential areas requires a combination of technology, education, and regulatory enforcement. This approach should actively involve the community to create a healthier and more sustainable environment.