Studi Analisis Kualitas Air Lau Borus (Outlet Danau Lau Kawar) Pasca Erupsi Gunung Sinabung di Kecamatan Naman Teran, Kabupaten Karo Provinsi Sumatera Utara

Abstract

Lau borus is an outlet who located on Lau Kawar Lake. the location of lau borus is located at the foot of mount sinabung where this mountain has experienced quite high eruptive activity for several years. Determination of the status of water quality in these waters using the Pollution Index method following the Minister of Environment Regulation number 115 of 2003 and Minister of Health Regulation number 32 of 2017 with the parameters to be tested in this research are TDS, pH, Fe, SO4, COD , BOD, Cu, Cl, Pb, NH3, Total Coliform. With 3 sample points taken by purposive sampling. The average results of the calculation of the Lau Borus Waters Pollution Index method Outlet Lau Kawar Lightly Polluted Lake (scores between 0.79 to 1.15). While the results of PERMENKES number 32 of 2017 the total coliform results show that this value has exceeded the average value. From these results, the quality status is influenced by pollutants from Total Coliform which are above the quality standard. The relationship between the eruption activity of Mount Sinabung and the quality of Lau Borus during sampling did not cause a significant pollution impact due to volcanic ash pollutants. The cause of Lau Borus pollution is from the direction of the eruption wind towards the Lau Borus Lake Lau Kawar Outlet, which is relatively small compared to the opposite direction, where the percentage of the eruption wind direction is towards Lau Kawar Lake. the direction of the lake in the opposite direction is 1: 8.