Sumber airtanah dangkal sangat peka terhadap sumber pencemaran. Pada daerahdaerah dengan sistem pertanian intensif, pemakaian pupuk nitrogen merupakan sumber potensial terhadap pencemaran senyawa nitrat pada airtanah dangkal. Fluktuasi konsentrasi senyawa nitrat dipengaruhi oleh banyak faktor secara bersamaan, seperti hidrogeologi, geologi, jarak sawah ke sumur dan aktivitas pemupukan. Hasil observasi terhadap 36 lokasi sampel airtanah dangkal di daerah persawahan Bekasi Utara menunjukkan konsentrasi senyawa nitrat pada sampel airtanah tersebut masih di bawah nilai ambang batas untuk bahan baku air minum. Rendahnya konsentrasi senyawa nitrat tersebut menandakan bahwa pencemaran airtanah dangkal akibat pemakaian pupuk di daerah pesawahan daerah penelitian masih kecil.
Shallow groundwater is sensitived to contaminate. In the areas with intensive agriculture system, consumption of nitrogen fertilizers is the potential source where nitrate can contaminate groundwater. The fluctuation of nitrate concentration is influenced by many factors, including hidrogeological condition, geology, distance between rice field to the well and fertilization activities. According to observation on 36 location of shallow groundwater in rice field of North Bekasi, it showed that nitrate concentration on groundwater samples still below threshold level for drinking water?s raw material. The result indicates that contamination of shallow groundwater due to the fertilizing in agriculture area at North Bekasi is still insignificant.
