ลำดับ	Parameter	วิธีวิเคราะห์
21	Nitrate	Cadmium Reduction Method
22	Nitrite	Colorimetric Method
23	Trichloroethene	GC
24	Tetrachloroethene	GC
25	Aldrin and Dieldrin	GC
26	Chlordane	GC
27	DDT	GC
28	2,4-D	GC
29	Heptachlor and Heptachlor Epoxide	GC
30	Hexachlorobenzene	GC