Available online on: http://jurnalkesehatan.unisla.ac.id/index.php/jev/index - 70 - Efektifitas Filter Batang Pisang terhadap Penurunan Kadar Total Suspended Solid, Chemical Oxygen Demand dan Biological Oxygen Demand pada Limbah Domestik Emi Jayanti Dwi Pratiwi 1 , Eko Sulistiono 2 dan Mimatun Nasihah 2,* 1 Mahasiswa Program Studi Kesehatan Lingkungan Universitas Islam Lamongan 2 Dosen Program Studi Kesehatan Lingkungan Universitas Islam Lamongan * Correspondence author: mima@unisla.ac.id ; Telp.: 082331602188 Received: 29 June 2021; Accepted: 22 Agustus 2021; Published: 30 September 2021 Abstract Household waste is liquid waste resulting from residential (household) activities such as kitchens, baths, and laundry. Domestic waste is the largest amount of pollutants (85%) that enter water bodies. This study aims to determine the decrease in levels of TSS (Total Suspended Solid), COD (Chemical Oxygen Demand) and BOD (Biochemical Oxygen Demand) in domestic waste after filtering banana stems. This type of research uses experiments with ANOVA analysis test and is supported by REGRESSION analysis test. the results of the analysis of the quality of domestic wastewater will be compared with the quality standards of PERMEN LHK No. P68/2016. The results of the three banana stem thicknesses (5 cm, 10 cm, 15 cm) showed different results, the best 84% reduction in TSS was at 15 cm thickness of banana stem filter media, while the best COD reduction was 81% and the best BOD reduction was 58%. the best at 5 cm thickness of banana stem filter media. It can be concluded that the TSS test on domestic wastewater shows that the thicker the banana stem filter thickness, the lower the TSS value, while the COD and BOD test results in wastewater show that the thinner the banana stem filter thickness, the COD and BOD values will decrease. Keywords: Domestic wastewater, TSS, COD, BOD Abstrak Limbah rumah tangga adalah limbah cair hasil buangan dari kegiatan perumahan (rumah tangga) seperti dapur, mandi, dan cucian. Limbah domestik merupakan jumlah pencemar terbesar (85%) yang masuk ke badan air. Penelitian ini bertujuan untuk mengetahui penurunan kadar TSS (Total Suspended Solid), COD (Chemical Oxygen Demand) dan BOD (Biocemical Oxygen Demand) pada limbah domestik setelah dilakukan filter batang pisang. Jenis penelitian ini menggunakan eksperimen dengan uji analisis ANOVA dan didukung dengan uji analisis REGRESI. hasil analisis kualitas air limbah domestik akan dibandingkan dengan standart baku mutu PERMEN LHK No. P68/2016. Hasil penelitian dari tiga ketebalan batang pisang (5 cm, 10 cm, 15 cm) terdapat hasil yang berbeda-beda, penurunan TSS terbaik 84 % ada pada 15 cm ketebalan media filter batang pisang sedangkan penurunan COD terbaik 81% dan penurunan BOD terbaik 58% terbaik pada 5 cm ketebalan media filter batang pisang. Dapat disimpulkan bahwa uji TSS pada air limbah domestik menunjukkan semakin tebal ketebalan filter batang pisang maka nilai TSS akan semakin menurun, sedangkan hasil uji COD dan BOD pada air limbah menunjukkan bahwa semakin tipis ketebalan filter batang pisang maka nilai COD dan BOD akan semakin menurun. Kata kunci: : Air limbah domestik; TSS; COD.