wcm.01.2025.184.189

The Central Bedadung Watershed (DAS) is an urban watershed susceptible to pollution due to human activities. Within this watershed, raw water collection is conducted by Perundam Tirta Pandalungan in Jember Regency. This study aims to assess water quality and analyze the impact of land cover on water quality in the Central Bedadung Sub-Watershed. A quantitative descriptive method was employed, utilizing one-tailed Spearman correlation analysis. The grab sampling method was used to collect samples from five locations during the low-discharge dry season. The tested parameters included temperature, pH, Total Dissolved Solids (TDS), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), and Dissolved Oxygen (DO). Water quality was evaluated based on Government Regulation Number 22 of 2021, Class I. The results indicated that temperature and BOD levels exceeded the specified quality standards. However, TDS, pH, and DO levels at all sample points complied with the quality standards. The Spearman correlation test revealed that land cover, particularly built-up and agricultural areas, significantly influenced water quality parameters, with a significance level (Sig. > 0.05). The relationship strength ranged from moderate to very strong. Water quality in the Central Bedadung Sub-Watershed met quality standards for TDS, pH, and DO. However, the Spearman correlation test indicated that land cover had no significant effect on water quality, with a significance level (Sig. > 0.05) and a relationship strength ranging from moderate to very strong.