Penilaian Status Kualitas Air Waduk Gajahmungkur Menggunakan Metode Indeks Pencemaran (IP) sebagai Evaluasi Kondisi Lingkungan Perairan

Riska Aprilia Triyadi; Nuha Amiratul Afifah; Herwin Lukito; Aditya Pandu Wicaksono; I Putu Gema Bujangga Waisnawa; Asep Mulyana

doi:10.55681/armada.v4i9.4295

Authors

Riska Aprilia Triyadi Teknik Lingkungan UPN "Veteran" Yogyakarta, Indonesia
Nuha Amiratul Afifah Teknik Lingkungan UPN "Veteran" Yogyakarta, Indonesia
Herwin Lukito Teknik Lingkungan UPN "Veteran" Yogyakarta, Indonesia
Aditya Pandu Wicaksono Teknik Lingkungan UPN "Veteran" Yogyakarta, Indonesia
I Putu Gema Bujangga Waisnawa Teknik Lingkungan UPN "Veteran" Yogyakarta, Indonesia
Asep Mulyana DAI USAID Indonesia Urban Resilient Water, Sanitation, dan Hygiene (IUWASH Tangguh), Indonesia

DOI:

https://doi.org/10.55681/armada.v4i9.4295

Keywords:

Waduk Gajah Mungkur, Kualitas Air, Indeks Polusi

Abstract

Waduk Gajah Mungkur merupakan sumber daya air strategis yang mendukung irigasi, pengendalian banjir, perikanan, pembangkit listrik, dan pariwisata. Namun, peningkatan beban pencemar berpotensi menurunkan kualitas air dan keberlanjutan pemanfaatannya. Penelitian ini bertujuan menentukan status kualitas air Waduk Gajah Mungkur menggunakan metode Indeks Pencemaran (IP) serta mengevaluasi variasi kualitas air berdasarkan kedalaman. Sampel air dianalisis pada kedalaman 0,3 m, 5 m, dan 10 m menggunakan data tahun 2017 dan 2022 yang mewakili musim hujan dan kemarau. Parameter yang dianalisis meliputi pH, DO, BOD, COD, TSS, fosfat, nitrat, dan total coliform. Hasil penelitian menunjukkan peningkatan pencemaran terutama pada parameter BOD, COD, dan total coliform. Nilai IP meningkat dari 1,35–1,40 pada tahun 2017 menjadi 1,88–2,12 pada tahun 2022, dengan peningkatan tertinggi sebesar 56,8% pada kedalaman 0,3 m. Meskipun masih dalam kategori tercemar ringan, tren peningkatan IP menunjukkan penurunan kualitas air secara bertahap. Pemantauan berkala dan pengendalian sumber pencemar organik serta mikrobiologis diperlukan untuk menjaga kualitas Waduk Gajah Mungkur.

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