“KARAKTERISTIK DAN STATUS MUTU KUALITAS AIR SUNGAI SANGATTA,  KUTAI TIMUR BERDASARKAN METODE INDEKS PENCEMARAN DAN STORET  ”. Jurnal Tropical Aquatic Sciences 5, no. 2 (October 10, 2026): 128–138. Accessed October 12, 2026. http://e-journals2.unmul.ac.id/index.php/mes/article/view/4765.