12-8  Sea Area, Areas of Fishing Ground and Water Quality
Sea					Evaluation of Seawater Quality in Offshore Area
	Sea Area	Area of Fishing	Average	Maximum
	(1 000	Ground of	Depth	Depth	Clean	Lightly	Moderately	Heavily
	hectares)	Continental Shelf	(m)	(m)	Area	Polluted Area	Polluted Area	Polluted Area
		(1 000 hectares)			(10 000 sq.km)	(10 000 sq.km)	(10 000 sq.km)	(10 000 sq.km)
Total	472700	280000			4.24	3.15	2.14	4.78
Bohai Sea	7700	7700	18	70	0.83	0.75	0.44	0.29
Huanghai Sea	38000	35300	44	140	0.94	0.70	0.58	0.65
Donghai Sea	77000	54900	370	2719	1.85	0.87	0.92	3.04
Nanhai Sea	350000	182100	1212	5559	0.63	0.83	0.21	0.79