SOx	NOx	PST	COT	COV
Subsidiaria Pemex	Año
Pemex Exploración (PEP)	1999	259,207	62,768	848	22,065	-
	2000	247,524	63,279	726	40,821	-
	2001	153,765	43,809	1,657	52,016	39,295
	2002	99,721	40,811	1,906	30,885	15,342
	2003	121,995	49,513	1,741	31,742	15,897
	2004	61,721	49,533	1,739	30,862	14,394
	2005	71,990	41,602	1,022	13,160	13,466
	2006	110,024	43,194	860	12,540	13,284
	2007	230,119	53,512	1,152	14,832	11,145
	2008	612,591	59,781	992	14,146	12,981
	2009	511,275	59,967	1,191	15,865	11,173
	2010	372,829	53,228	151	12,356	9,775
	2011	192,367	67,486	1,070	20,976	8,488
	2012	124,062	62,774	1,203	17,677	9,749
	2013	157,646	67,355	1,235	23,377	9,118
Pemex Refinación (PR)	1999	265,037	30,223	16,996	158,133	-
	2000	243,774	26,655	15,791	152,253	-
	2001	376,483	25,193	19,937	38,800	36,764
	2002	338,093	32,645	20,606	37,187	34,913
	2003	446,094	35,623	34,749	35,764	31,997
	2004	413,839	34,316	17,732	35,642	32,147
	2005	395,931	33,382	16,917	4,093	36,599
	2006	371,944	34,502	17,687	4,237	31,465
	2007	293,417	34,382	17,482	4,321	31,446
	2008	298,723	31,192	17,227	4,067	32,829
	2009	285,651	30,733	18,085	4,687	30,504
	2010	236,054	27,606	7,815	5,034	30,170
	2011	252,642	28,940	19,166	4,920	29,054
	2012	240,691	29,582	14,650	3,321	26,115
	2013	253,984	31,376	15,886	3,541	24,715
Pemex Gas y Petroquímica Básica (PGPB)	1999	164,630	10,626	0	0	-
	2000	150,234	12,519	15	0	-
	2001	156,763	9,647	38,889	5,386	3,233
	2002	58,788	9,664	35,760	4,755	2,396
	2003	32,007	9,210	33,670	9,239	2,351
	2004	34,488	9,246	668	16,204	2,561
	2005	39,575	8,986	666	13,691	2,625
	2006	29,083	9,060	704	13,795	2,192
	2007	42,385	9,492	688	13,718	2,287
	2008	34,262	9,772	679	13,738	2,220
	2009	33,736	9,835	709	13,686	2,135
	2010	23,247	9,758	336	12,975	2,068
	2011	25,960	9,514	589	13,597	2,062
	2012	48,487	9,178	685	13,579	1,838
	2013	69,874	7,257	587	13,372	1,824
Pemex Petroquímica (PPQ)	1999	0	28,104	200	221	-
	2000	3	24,386	286	246	-
	2001	679	8,174	22,349	6,178	3,795
	2002	46	7,043	17,933	5,334	3,099
	2003	2,834	6,939	16,387	5,150	3,263
	2004	3,355	7,202	678	4,506	2,608
	2005	9,421	7,118	710	1,709	2,387
	2006	1,085	7,256	571	1,651	2,239
	2007	191	7,653	594	1,727	2,083
	2008	579	7,971	587	1,722	2,392
	2009	389	7,503	533	1,575	2,076
	2010	77	7,237	157	1,607	2,513
	2011	49	6,684	491	1,681	3,207
	2012	44	6,596	455	1,270	2,121
	2013	38	6,630	463	1,579	2,746
Total	1999	688,874	131,721	18,044	180,419	-
	2000	641,535	126,839	16,818	193,320	-
	2001	687,690	86,823	82,832	102,380	83,087
	2002	496,648	90,163	76,205	78,161	55,750
	2003	602,930	101,285	86,547	81,895	53,508
	2004	513,403	100,297	20,817	87,214	51,710
	2005	516,917	91,088	19,315	32,653	55,077
	2006	512,136	94,012	19,822	32,223	49,180
	2007	566,112	105,039	19,916	34,598	46,961
	2008	946,155	108,716	19,485	33,673	50,422
	2009	831,051	108,038	20,518	35,813	45,888
	2010	632,207	97,829	8,459	31,972	44,526
	2011	471,018	112,624	21,316	41,174	42,811
	2012	413,284	108,130	16,993	35,847	39,823
	2013	481,542	112,618	18,171	41,869	38,403