Penelitian kualitas air pada sumber air distribusi tekMIRA dilakukan dengan menganalisis beberapa parameter seperti analisis pH, DHL, klorida, kesadahan, COD (Chemical Oxygen Demand), fosfat, amonia, nitrat, nitrit dan logam berat (Fe, Mn, Cu, Zn). Metode analisis yang digunakan adalah argentometri untuk analisis klorida, kompleksometri untuk analisis kesadahan, spektrofotometri untuk analisis fosfat, amonia, nitrat, dan nitrit, dan SSA untuk analisis logam berat. Dari hasil analisis, diperoleh hasil analisis sebagai berikut : air bak I (pH = 8,72, DHL = 0,410 μs/cm, klorida = 12,31 mg/L, kesadahan = 120 mg/L CaCO3, COD = 17,23 mg/L O2, fosfat = 0,113 mg/L, amonia = 0,0475 mg/L, nitrat = 0,0015 mg/L, nitrit = 0,0074 mg/L, Fe = 0,033 mg/L, Mn = 0,1470 mg/L, Cu = 0,0030 mg/L, dan Zn = 0,02 mg/L) dan air bak II (pH = 8,56, DHL = 0,393 μs/cm, klorida = 10,14 mg/L, kesadahan = 119,2 mg/L CaCO3, COD = 5,36 mg/L O2, fosfat = 0,147 mg/L, amonia = 0,2996 mg/L, nitrat = 0,1399 mg/L, nitrit = 0,0007 mg/L, Fe = 0,028 mg/L, Mn = 0,0041 mg/L, Cu = 0,0010 mg/L, dan Zn = 0,0175 mg/L). Maka, dapat disimpulkan bahwa kualitas air distribusi tekMIRA pada bak II baik karena nilai parameter uji memenuhi kriteria mutu air kelas satu berdasarkan Peraturan Pemerintah Nomor 82 Tahun 2001 dan Peraturan Menteri Kesehatan RI Nomor 492 Tahun 2010. Kata kunci: Analisis kimia air, unsur kimia.

The Research of water quality from the source of water distribution in tekMIRA have been done by using several parameters, they were pH analysis, DHL, chloride, hardness, COD (Chemical Oxygen Demand), phosphate, amonia, nitrate, nitrit and heavy metals (Fe, Mn, Cu, Zn). The methods of analysis were argentometry for chloride analysis, complexometry for hardness analysis, spectrophotometry for analysis of phosphate, amonia, nitrate, and nitrite and AAS (Atomic Absorption Spectrophotometry) for heavy metal analysis. The Results of the analysis for water quality in the first tube showed (pH = 8.72, DHL = 0.410 μs/cm, chloride = 12.31 mg/L, hardness = 120 mg/L CaCO3, COD = 17.23 mg/LO2, phosphate = 0.113 mg/L, amonia = 0.0475 mg/L, nitrate = 0.0015 mg/L, nitrite = 0.0074 mg/L, Fe = 0.033 mg/L, Mn = 0.1470 mg/L, Cu = 0.0030 mg/L, and Zn = 0.02 mg/L) and the second tube showed (pH = 8.56, DHL = 0.393 μs/cm, chloride = 10.14 mg/L, hardness = 119.2 mg/L CaCO3, COD = 5.36 mg/L O2, phosphate = 0.147 mg/L, amonia = 0.2996 mg/L, nitrate = 0.1399 mg/L, nitrite = 0.0007 mg/L, Fe = 0.028 mg/L, Mn = 0.0041 mg/L, Cu = 0.0010 mg/L, and Zn = 0.0175 mg/L). It can be concluded that the quality of water distribution in tekMIRA for the second tube is good, because the value of parameters at the second tube is appropriate with the first class criteria of water quality based on "Peraturan Pemerintah Nomor 82 Tahun 2001"� and "Peraturan Menteri Kesehatan RI Nomor 492 Tahun 2010"�. Key words: Chemical analysis of water, chemical elements.

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