The Effect Of Hausehold Waste Disposal On Water Quality Of The Ngelom River In Ngelom Village, Taman District, Sidoarjo Regency, East Java

Hasil survey pendahuluan menunjukkan 9% dari 224 penduduk sempadan sungai Ngelom membuang limbah rumah tangga di sungai sehingga dapat menyebabkan pencemaran sungai. Sungai juga memiliki kemampuan untuk pemurnian alami pada saat mencapai hilir. Penelitian ini bertujuan untuk mengetahui 1) Status Pencemaran limbah rumah tangga di Sungai Ngelom Kelurahan Ngelom Kecamatan Taman Kabupaten Sidoarjo 2) Self purification yang terjadi di Sungai Ngelom, Kelurahan Ngelom Kecamatan Taman Kabupaten Sidoarjo.

Penelitian ini menggunakan metode survey dengan pendekatan dekriptif kuantitatif. Lokasi penelitian di Sungai Ngelom, Kelurahan Ngelom. Sampel air yang diambil menggunakan teknik purposive sampling sebanyak 5 titik dalam sekali pengambilan dengan volume 2 liter. Sampel air sungai Ngelom dilakukan pengujian laboratorium untuk mengetahui tingkat kualitas air sungai dengan parameter fisika, kimia, dan biologi (pH, BOD, COD, TSS, minyak dan lemak, amoniak, dan total coliform). Analisis data yang digunakan adalah menghitung indeks pencemaran menggunakan metode Indeks Pencemaran dan self purifikasi.

 Hasil penelitian menunjukkan bahwa 1) Sungai Ngelom memiliki indeks pencemaran tercemar sedang dengan dengan parameter pencemar COD, TSS, Total Koliform serta Minyak dan Lemak yang melebihi ambang batas. 2) Tidak terjadi self purifikasi di Sungai Ngelom karena pada titik pertama hingga ke lima menunjukkan peningkatan parameter BOD artinya terus ada pencemaran pada hulu hingga hilir.

Kata Kunci: kualitas air, self purification, Sungai Ngelom.

Preliminary survey results show that 9% of the 224 residents of the Ngelom river border throw household waste in the river so that it can cause river pollution. Rivers also have the ability for natural purification when they reach downstream. This study aims to determine 1) the status of household waste pollution in the Ngelom River, Ngelom Village, Taman District, Sidoarjo Regency 2) Self purification that occurs in the Ngelom River, Ngelom Village, Taman District, Sidoarjo Regency.

           This study uses a survey method with a quantitative descriptive approach. The research location is on the Ngelom River, Ngelom Village. Water samples were taken using a purposive sampling technique as many as 5 points in one take with a volume of 2 liters. Ngelom river water samples were tested by laboratory to determine the level of river water quality with physical, chemical, and biological parameters (pH, BOD, COD, TSS, oil and fat, ammonia, and total coliform). Analysis of the data used is to calculate the pollution index using the Pollution Index and self-purification methods.

           The results showed that 1) the Ngelom River had a moderately polluted pollution index with pollutant parameters COD, TSS, Total Coliform and Oil and Fat that exceeded the threshold. 2) There is no self-purification in the Ngelom River because the first to fifth points show an increase in the BOD parameter, meaning that there is continued pollution from upstream to downstream.

Keywords: water quality, self purification, Ngelom River