? in the blood. There were three isomeric compounds of DDT in the fat and two in the blood were detectable. Conclusion There was still accumulation of HCH and DDT in human body fat and blood in Xiaogan population although the accumulative levels were significantly lower than that of the allowable residue standard of China.

?-HCH. The average of pp'-DDE in the surface water was the highest, 0.062 ?g/L. In the water in the deep well of 70 meters, organochlorine was still found. Conclusion The residues of organochlorine pesticide in different soil and water of the agricultural products base in Xiaogan have been detected, the contents are under the related national standard limitation, but the potential threat of the accumulation of organic chlorine pesticide should not be underestimated.