Analysis of River Water Quality Based on Pollution Index Water Quality Status, Lombok District, NTB

Leneng River is one of the rivers in Praya City, Central Lombok Regency, which receives domestic, agricultural, and household industrial waste. Various community activities along banks have affected river water quality. Some communities on River, from upstream to downstream, still use for their daily needs. This study aims 1) analyze quality terms environmental parameters (Physical, chemical, biological) 2) Determine level pollution using Pollution Index (IP) method. measurements were carried out at 3 (three) sample points. Parameters measured observed physical parameters, namely Total Solid Suspend (TSS); chemical pH, Phosphate (T.PO4), Biological Oxygen Demand (BOD), Chemical (COD), Dissolved (DO), biological coliform Fecal Coliform. type research survey with a quantitative descriptive approach. The results showed that TSS value point 1 (upstream) exceeded required standard; highest concentration was 54 mg/L, lowest 2 (middle section) 2.50 mg/L. Value parameter pH 7.7-8.7, T.PO4 0.05 mg/L-0.29 BOD 0.17-0.42 COD 8 mg/L -9mg/L, DO 6.07 mg/L-7.57 this shows meets class I standards according PP 22 2021, while total Facel standards. 10,000 - 20,000 MPN/100 mL, 600 mL – 2,500 based status 2.84, middle part 1.97, downstream decrease river, lightly polluted category.