Distributing Characteristics of NH4-N Content in Yongxin Aquiculture Zone and Coastwise of Longwan District Wenzhou City

Based on investigating and analyzing the samples from circumjacent water area and coastwise of Yongxin inning bread aquatics zone of Longwan district Wenzhou city from August, 2004 to March, 2005, the results showed that the NH4-N content of waste water out letting from industrial park exceeded several ten times of normal quality. The NH4-N content near the Binhai industrial zone ranked first, followed by Lantian industrial zone,Fupin industrial zone,Gaoxing industrial zone.The industrial zone produced mostly compositive-hide,chemical products,galvanoplastics and pesticide.There was the NH4-N of high concentration in the waste water in letting from the industrial zone, the highest content up to 87.5 mg/L. The circumjacent entironment around the sea into which the waste water was drained was seriously polluted.