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(1997-2007)

Year

 

Malhotra Steel

Choudhary Steel

   SPM

 SO2

NOx

 SPM

 SO2

 NOx

1997

382

17

36

381

17

40

1998

413

16

41

422

18

41

1999

424

17

35

396

20

35

2000

399

13

31

393

12

31

2001

117

12

34

414

12

34

 

(2001-2007)

 

Year

 

Raj Steel

United Steel

   SPM/RSPM

 SO2

NOx

 SPM/RSPM

 SO2

 NOx

2001

417

12

34

414

12

34

2002

257

09

30

296

09

28

2003

272

11

34

271

10

33

2004

257

14

39

252

14

40

2005

235

17

31

242

16

31

2006

230

11

29

223

11

30

2007

249

11

30

252

13

30

Units : µg/m3

 


Source: Punjab Pollution Control Board , Patiala