id	keyword
gc-1214	groundwater
gc-1214	samples
gc-1214	quality
gc-1214	health
gc-1214	et al
gc-1214	risk
gc-1214	pakistan
gc-1214	area
gc-1214	assessment
gc-1214	groundwater samples
gc-1214	study
gc-1214	arsenic
gc-1214	gujranwala
gc-1214	groundwater quality
gc-1214	environmental