SALSABILA, ANANDA TANIA (2022) PENENTUAN STATUS PENCEMARAN BERDASARKAN METODE INDEKS PENCEMARAN DI SUNGAI ELO KABUPATEN MAGELANG (22m115). Undergraduate thesis, Universitas Diponegoro.

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Abstract

ABSTRAK
Ananda Tania Salsabila, 26010118140090. Penentuan Status Pencemaran
Berdasarkan Metode Indeks Pencemaran di Sungai Elo Kabupaten Magelang (Siti
Rudiyanti dan Oktavianto Eko Jati)
Sungai Elo yang termasuk anak Sungai Progo terletak di Kabupaten Magelang,
memiliki panjang aliran sekitar 47 km. Sungai Elo dimanfaatkan untuk memenuhi
kebutuhan seperti pengairan area pertanian serta rekreasi dan telah mengalami
pencemaran akibat limbah pertanian, pemukiman, dan industri. Sehingga
dipandang perlu dilakukan analisis tingkat pencemaran. Penelitian dilakukan pada
Januari 2022. Tujuan penelitian untuk mengetahui konsentrasi variabel kualitas air
utama dan pendukung Sungai Elo Kabupaten Magelang, mengetahui status
pencemaran sungai berdasarkan nilai indeks pencemaran, dan mengetahui korelasi
antar variabel. Metode penelitian adalah survey. Penentuan lokasi sampling terdiri
atas tiga stasiun yang berdekatan dengan area pertanian, pemukiman, dan industri.
Stasiun 1 terletak di Desa Madusari, Kec. Secang, stasiun 2 di Desa Mertoyudan,
Kec. Mertoyudan, dan stasiun 3 di Desa Blondo Kec. Mungkid. Setiap stasiun
dilakukan pengukuran dan pengambilan sampel pada tiga titik. Pengukuran kualitas
air dilakukan dengan mengukur variabel utama (TSS, BOD, COD, nitrat, amonia)
serta variabel pendukung (temperatur, kecepatan arus, lebar sungai, debit sungai,
kedalaman sungai, pH, oksigen terlarut). Penentuan tingkat pencemaran dilakukan
melalui analisis indeks pencemaran (IP) serta uji korelasi. Hasil penelitian variabel
yang diuji telah memenuhi baku mutu air kelas 2 PP. No. 22 Tahun 2021 kecuali
variabel BOD. Hasil analisis indeks pencemaran stasiun 1 dan 2 sebesar 1,084 dan
1,746 termasuk kategori tercemar ringan, stasiun 3 sebesar 0,975 kategori
memenuhi baku mutu. Variabel yang diduga menyebabkan terjadinya pencemaran
adalah BOD. Variabel yang telah diuji tidak memiliki hubungan yang signifikan
namun memiliki korelasi sangat lemah hingga sangat kuat sebesar -0,950 hingga
0,900.
Kata Kunci: Indeks Pencemaran (IP), Pencemaran Perairan, Sungai Elo
vii
ABSTRACT
Ananda Tania Salsabila, 26010118140090. Determination of Pollution Status
Based on Pollution Index in Elo River, Magelang Regency (Siti Rudiyanti and
Oktavianto Eko Jati)
Elo River is located in Magelang Regency and belongs to The Progo tributary. Elo
River has a flow length about 47 km. Elo River used for humans life and has been
polluted due to agricultural, residential, and industrial waste. Necessary to analyze
the level of pollution. The study was conducted in January 2022. The purpose of
this study to determine the concentration of main and supporting water quality
variables, determine the status of river pollution based on the pollution index value,
and determine the correlation between variables. The research method is by survey
methods. Determination of the sampling location consists of three stations adjacent
to agricultural, residential, and industrial areas. Station 1 in Madusari, Secang,
station 2 in Mertoyudan, station 3 in Blondo, Mungkid. The station was measured
and sampled at three locations. Measurement of water quality is carried out by
measuring main variables (TSS, BOD, COD, nitrate, ammonia) and supporting
variables (temperature, current speed, river width, river discharge, river depth, pH,
dissolved oxygen). The results of this study that each variables meets the quality
standard class 2 PP No. 22 Tahun 2021 except BOD. The results of the pollution
index for the first and second stations were 1.084 and 1.746, included in light polluted, the third station was 0.975 has met the quality standard. Based on the
result, the concluded that the variable causes pollution is BOD. The variables don’t
have a significant relationship but have a very weak to very strong correlation by -0.950 to 0.900.
Keywords: Elo River, Pollution Index, Water Pollution

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