Based on the GC-MS technique,we conducted a survey to investigate the concentration,distributions,and emission sources of sulfonamides( SAs),fluoroquinolones( FQs),tetracycline( TCs),β-lactam,and macrolides in groundwater in Beijing. Results indicated that SAs,FQs,and TCs were the main types of antibiotic in groundwater,and the detection ratios of trimethoprim,ciprofloxacin,and norfloxacin were above 70%. Concentration of antibiotics in sites from sewage irrigation areas were significantly higher than those...