ABSTRAK

Sungai Riam Kanan adalah bagian dari sub-sub DAS Riam Kanan. Penelitian ini bertujuan untuk mengetahui tingkat pencemaran dan kesuburan Sungai Riam Kanan. Metode penggambilan sampel dilakukan dengan purposive sampling. Penelitian ini menggunakan analisis indeks pencemaran, tingkat kesuburan yang ditinjau dari kandungan nitrat dan fosfat dan uji-t parameter kualitas air antar stasiun. Pengukuran kualitas air dengan parameter suhu, DO, pH, TSS, nitrat, fosfat, BOD dan COD. Hasil pengukuran akan dibandingkan dengan baku mutu PP. No. 22 Tahun 2021. Hasil menunjukkan terdapat 2 parameter yang melebihi 4 kelas baku mutu yaitu BOD dan fosfat. Indeks pencemaran menujukkan tercemar sedang untuk baku mutu air kelas 1 dan 2, tercemar ringan untuk baku mutu air kelas 3 dan 4. Berdasarkan kosentrasi nitrat perairan termasuk oligotrofik, dari konsentrasi fosfat perairan termasuk eutrofik. Hasil uji-t menunjukkan tidak terdapat perbedaan hasil pengukuran kualitas air antar stasiun.

Kata Kunci : Kualitas Air, Tingkat Pencemaran, Tingkat Kesuburan

ABSTRACT

The Riam Kanan River is part of the Riam Kanan watershed. This study aims to determine the level of pollution and fertility of the Riam Kanan River. The sampling method was carried out by purposive sampling. This study used analysis of pollution index, fertility level in terms of nitrate and phosphate content and t-test of water quality parameters between stations. Water quality measurement with parameters of temperature, DO, pH, TSS, nitrate, phosphate, BOD and COD. The measurement results will be compared with PP quality standards. No. 22 of 2021. The results show that there are 2 parameters that exceed 4 quality standard classes, namely BOD and phosphate. The pollution index shows moderate pollution for class 1 and 2 water quality standards, slightly polluted for class 3 and 4 water quality standards. Based on the concentration of nitrate in water, it is classified as oligotrophic, from the concentration of phosphate, the water is classified as eutrophic. The results of the t-test showed that there were no differences in the results of water quality measurements between stations.

Keywords: Water Quality, Pollution Level, Fertility Level