<![CDATA[SARISebagian besar penduduk Kabupaten Sumbawa Barat tinggal di kawasan pedesaan. Pertanian merupakan sumber utama pendapatan mereka. Sumber air tanah di Kabupaten Sumbawa Barat cukup melimpah, sehingga selain digunakan sebagai sumber air bersih, dapat juga dimanfaatkan untuk irigasi. Pengambilan percontoh air dilakukan di 8 kecamatan yaitu Kecamatan Sekongkang, Jereweh, Maluk, Taliwang, Brang Ene, Brang Rea, Seteluk, dan Poto Tano. Pendekatan berdasarkan diagram Wilcox dan perbandingan Serapan Natrium (Sodium Adsorption Ratio-SAR) digunakan untuk mengetahui kelayakan air tanah bagi keperluan irigasi. Kualitas air di Kabupaten Sumbawa Barat umumnya tidak memenuhi persyaratan kualitas air minum tetapi dapat digunakan untuk keperluan irigasi.Kata kunci: air tanah, irigasi, diagram Wilcox, Sumbawa BaratABSTRACTResidents of West Sumbawa Regency are mostly live in rural area. Agriculture represents the main source of their earnings. In West Sumbawa Regency groundwater is quite abundant and it is used either as the source of drinking water and can also be used for irrigation. Shallow groundwater samples were taken in 8 Sub Districts namely Sekongkang, Jereweh, Maluk, Taliwang, Brang Ene, Brang Rea, Seteluk and Poto Tano. An approach based on Wilcox diagram and Sodium Adsorption Ratio (SAR) are used to find out ground water elegibility for irrigation.Water quality in West Sumbawa Regency generally does not meet the quality requirements of drinking water but can be used for irrigation.Keywords: groundwater, irrigation, Wilcox diagram, West Sumbawa]]>
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