Electronic Theses and Dissertation

Danau Aneuk Laot merupakan danau yang terletak di Pulau Weh, Kota Sabang, Provinsi Aceh. Danau Aneuk Laot merupakan sumber air bersih utama Kota Sabang yang dimanfaatkan oleh masyarakat sekitar dalam kegiatan sehari-hari. Aktivitas yang terjadi di sekitar danau menyebabkan tingginya masukan beban pencemaran ke dalam danau. Tujuan penelitian ini adalah untuk mengetahui status pencemaran danau Aneuk Laot Kota Sabang berdasarkan indeks storet, indeks pencemaran dan CCME WQI(Canadian counsil of ministers of the environment). Penentuan titik stasiun dilakukan dengan menggunakan metode purposive sampling. Pengambilan sampel air dilakukan pada 4 titik stasiun di bgian permukaan dan dasar perairan dengan menggunakan water sampler.Sampel air diambil dari setiap stasiun dandisimpan ke dalam botol sampel sebanyak 600 ml. Pengukuran parameter fisik meliputi kecerahan, suhu, pH dan DO. Pengukuran parameter kimia meliputi zat padat terlarut (TDS), residu tersuspensi (TSS), BOD, COD, amonia, nitrat, nitrit, besi, timbal, minyak dan lemak, deterjen, daya hantar listrik serta sulfida. Pengukuran parameter biologi meliputi e-coliform. Hasil penelitian menunjukkan analisis indeks storet tergolong tercemar sedang hingga tercemar berat dengan total skor untuk kelas I yaitu -94, kelas II total skor -72, kelas III total skor -48 dan kelas IV total skor -
16. Sedangkan hasil penelitian analisis indeks pencemaran tergolong kategori tercemar sedang untuk kelas I dengan total nilai 5,93, tergolong tercemar ringan untuk kelas II dan III dengan masing-masing total nilai 2,89 dan 2,46 dan kelas IV tergolong baik dengan total nilai 0,99. Serta hasil penelitian analisis CCME menunjukkan status perairan buruk untuk kelas I dengan total nilai 32,9, status perairan kurang baik untuk kelas II dengan total nilai 48,7, status perairan cukup untuk kelas III dengan total nilai 71,3 dan status perairan baik untuk kelas IV dengan total nilai 89,7. Hasil ini jika ditinjau dari kandungan nutrien berdasarkan baku mutu air danau maka, Danau Aneuk Laot cenderung mengalami pencemaran berat.

Kata kunci : Kualitas air, Pencemaran,Storet, CCME dan Danau Aneuk Laot

Aneuk Laot lake is a lake located in Weh Island, Sabang, Aceh Province. Aneuk Laot lake as the main source of freshwater in Sabang has been used by the community in their daily activities. Activities occur around in the lake caused a hight of pollution loads in the lake. Therefore, this study aimed to determine the pollution status based on the storet index, pollution index and CCME WQI (Canadian council of ministers water quality index) in Aneuk Laot lake, Sabang. The method used to determine the station point was purposive sampling. Water sampling was carried out at 4 stations points on the surface and bottom of the using a water sampler. The lake water samples at each station were put into 600 ml sample bottle. Measurement of physical parameters of the water include brightness, temperature, pH and DO. Measurement of chemical parameter were dissolved solids (TDS), suspended residue (TSS), BOD, COD, ammonia, nitrate, nitrite, iron, lead, oil and grease, detergent, electrical conductivity and sulfides. Measurementof biological parameters were e-coliform. The results of calculations using the storet index obtained that class I, II and III were classified as heavily polluted with a score of -94, -72 and -48 respectively, while class IV was classified as moderately polluted with a total score of - 16. The results of calculations using the pollution index showed that class I was moderately polluted with a total value of 5.93, while classes II and III were classified as lightly polluted with a total value of 2.89 and 2.46 and class IV was classified as good waters with a total value of 0.99. While the results of calculations using the Canadian council of ministers of the environment index obtained bad water status with a total value of 32.9 for class I, poor water status with a total value of 48.7 for class II, while class III classified as moderate water status with a total value of 71.3 and class IV the status of the waters is good with a total score of 89.7. If these results are reviewed based on nutritional content, Aneuk Laot Lake tends to be heavily polluted. Keywords: Water quality, Pollution, Storet, CCME and Aneuk Laot lake