NO_x Emissions 1970-2002

Source Category	1970	1971	1972	1973	1974	1975	1976	1977	1978	1979	1980	1981	1982	1983	1984	1985	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002
TOTAL ALL SOURCES	26,883	26,741	27,025	27,305	26,958	26,377	27,237	27,646	27,502	27,260	27,079	26,836	26,422	26,169	26,717	25,757	25,422	25,582	26,074	25,378	25,529	25,179	25,260	25,357	25,349	24,956	24,787	24,705	24,348	22,845	22,598	21,547	21,102
FUEL COMBUSTION TOTAL (Tier 0 - 01)	10,061	10,372	10,806	11,179	10,903	10,486	11,291	11,740	11,602	11,409	11,320	11,188	10,992	10,728	11,352	10,048	9,870	10,014	10,472	10,537	10,894	10,779	10,928	11,111	11,015	10,827	10,513	10,554	10,383	9,198	8,819	8,454	8,294
FUEL COMB. ELEC. UTIL. (Tier 1 - 01)	4,900	5,080	5,410	5,789	5,743	5,694	6,120	6,567	6,423	6,433	7,024	7,054	6,776	6,921	7,268	6,127	6,111	6,246	6,545	6,593	6,663	6,519	6,504	6,651	6,565	6,384	6,164	6,276	6,232	5,721	5,330	4,917	4,699
Coal	3,888	4,022	4,303	4,761	4,749	4,828	5,287	5,689	5,553	5,538	6,123	6,175	6,003	6,222	6,515	5,240	5,239	5,376	5,666	5,676	5,642	5,559	5,579	5,744	5,636	5,579	5,601	5,644	5,436	4,909	4,563	4,208	4,094
bituminous	2,112	2,150	2,274	2,498	2,518	2,590	2,849	3,040	2,988	3,027	3,439	3,510	3,472	3,614	3,820	4,378	4,386	4,465	4,542	4,595	4,532	4,435	4,456	4,403	4,207	3,830	3,802	3,828	3,635	3,512	3,218	2,937	2,632
subbituminous	1,041	1,059	1,120	1,231	1,240	1,276	1,403	1,497	1,472	1,491	1,694	1,729	1,710	1,780	1,882	668	635	702	867	837	857	874	868	1,087	1,167	1,475	1,570	1,591	1,575	1,137	1,087	1,035	1,296
anthracite & lignite	344	348	366	400	403	414	453	484	472	479	542	551	546	566	597	194	218	209	256	245	254	250	255	255	262	273	229	225	226	256	255	233	163
other	391	465	542	632	587	548	582	668	621	541	447	385	274	261	217	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	3	3	3	3
Oil	1,012	1,058	1,107	1,029	993	866	833	878	870	895	901	879	774	699	752	193	263	217	273	285	221	212	170	180	163	96	118	145	223	201	166	170	130
residual	40	56	109	125	135	101	97	122	123	78	39	26	18	17	23	178	247	201	256	268	207	198	158	166	149	94	116	142	220	185	152	156	121
distillate	972	1,001	998	904	858	765	736	756	747	818	862	853	756	682	729	15	16	16	16	17	14	14	13	14	14	2	2	2	3	16	14	13	8
other	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
Gas	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	646	559	605	557	582	565	580	579	551	591	562	285	319	381	434	422	359	270
natural	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	646	559	605	557	582	565	580	579	551	591	562	273	306	363	426	414	352	264
process	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	12	13	19	7	8	7	6
Other	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	7	8	28	41	40	41	54
Internal Combustion	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	48	50	48	50	49	235	168	175	176	175	148	153	161	164	137	140	139	152
FUEL COMB. INDUSTRIAL (Tier 1 - 02)	4,325	4,445	4,531	4,546	4,353	4,007	4,331	4,357	4,348	4,193	3,555	3,445	3,520	3,160	3,415	3,209	3,065	3,063	3,187	3,209	3,035	2,979	3,071	3,151	3,147	3,144	3,151	3,101	3,050	2,709	2,723	2,757	2,870
Coal	771	640	614	566	528	520	485	461	469	509	444	511	498	512	573	608	613	596	617	615	584	570	574	589	602	597	540	537	524	419	408	432	447
bituminous	532	442	426	392	366	359	333	318	324	352	306	354	345	355	397	430	439	435	447	446	399	387	405	413	420	412	366	364	357	244	237	250	232
subbituminous	164	136	131	121	113	111	103	98	100	108	94	109	106	109	122	14	14	14	15	14	18	20	21	28	38	46	46	46	44	35	34	36	62
anthracite & lignite	75	62	57	53	49	51	49	46	45	48	44	48	46	48	54	33	31	27	29	30	26	26	26	26	27	26	19	19	18	22	21	23	35
other	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	131	129	119	126	124	141	137	122	122	117	112	109	108	105	118	114	122	119
Oil	332	388	409	431	402	354	432	470	457	340	286	245	247	175	175	309	300	292	296	294	265	237	244	245	241	247	224	216	209	192	201	214	175
residual	228	225	235	246	230	186	240	255	247	211	179	139	151	100	100	191	181	172	175	176	180	146	154	153	149	156	140	130	126	104	112	115	86
distillate	104	113	123	127	114	112	132	144	141	75	63	73	67	50	52	89	89	89	91	88	71	73	73	75	76	73	73	74	72	81	81	91	80
other	NA	50	51	57	59	56	60	71	69	54	44	33	29	25	24	29	30	31	31	29	14	18	17	17	17	17	11	12	11	8	8	8	8
Gas	3,060	3,270	3,349	3,386	3,260	2,983	3,245	3,250	3,231	3,143	2,619	2,493	2,587	2,277	2,457	1,520	1,433	1,505	1,584	1,625	1,181	1,250	1,301	1,330	1,333	1,324	1,204	1,189	1,175	1,033	1,048	1,044	1,058
natural	3,053	3,119	3,196	3,230	3,106	2,837	3,091	3,095	3,078	2,988	2,469	2,364	2,463	2,151	2,329	1,282	1,206	1,285	1,360	1,405	967	1,025	1,068	1,095	1,103	1,102	992	970	958	835	845	848	837
process	8	7	7	5	7	5	9	6	6	6	5	5	3	3	3	227	216	210	214	209	211	222	230	233	228	220	210	216	215	197	202	195	219
other	NA	144	147	151	147	140	145	149	148	149	145	125	121	123	125	11	10	10	10	10	3	3	3	2	2	2	3	3	3	1	1	1	3
Other	162	147	158	164	163	149	170	176	191	201	205	196	187	196	209	118	120	119	121	120	131	129	126	124	124	123	119	113	114	142	140	148	145
wood/bark waste	102	104	111	116	115	108	123	128	140	141	138	138	130	144	144	89	92	92	93	92	89	82	82	83	83	84	83	79	80	100	99	106	100
liquid waste	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	12	12	12	12	12	8	11	10	11	11	11	9	8	8	7	7	7	9
other	60	43	46	48	48	41	46	47	51	61	67	57	57	51	64	17	16	15	16	16	34	36	34	30	30	28	27	26	25	36	35	36	36
Internal Combustion	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	655	599	552	569	556	873	793	825	863	846	854	1,064	1,045	1,028	923	926	918	1,045
FUEL COMB. OTHER (Tier 1 - 03)	836	848	865	844	808	785	840	816	831	783	741	689	696	648	670	712	694	706	740	736	1,196	1,281	1,353	1,308	1,303	1,298	1,197	1,177	1,101	768	766	779	725
Commercial/Institutional Coal	23	27	30	34	38	33	33	35	40	34	25	29	33	34	37	37	36	37	39	38	40	36	38	40	40	38	33	35	37	36	37	38	38
Commercial/Institutional Oil	210	211	215	213	191	176	197	188	185	150	155	122	118	96	96	106	110	121	117	106	97	88	93	93	95	103	95	97	80	81	83	85	75
Commercial/Institutional Gas	120	125	130	130	128	125	133	125	130	139	131	126	130	122	126	145	139	144	157	159	200	210	225	232	237	231	247	252	243	244	249	257	229
Misc. Fuel Comb. (Except Residential)	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	11	12	11	11	11	34	32	28	31	31	30	22	23	23	35	36	37	24
Residential Wood	44	42	42	39	41	39	44	49	57	66	74	75	81	80	81	88	77	69	74	75	46	50	53	45	44	49	30	30	30	45	33	33	28
Residential Other	439	442	448	428	410	412	433	418	419	393	356	337	333	316	331	326	320	323	343	347	780	865	916	867	857	847	770	740	688	326	328	330	332
distillate oil	118	117	120	118	112	113	125	124	123	104	85	77	71	62	64	75	76	79	80	78	209	211	210	210	210	210	193	188	172	53	53	53	56
natural gas	242	249	256	244	239	246	252	241	245	248	238	227	232	219	228	248	241	241	259	267	449	469	489	513	516	519	470	437	400	208	209	211	235
other	79	76	71	66	58	54	55	54	51	41	33	33	31	36	40	3	3	3	3	3	121	185	218	144	131	118	108	114	117	65	66	66	42
INDUSTRIAL PROCESSES TOTAL (Tier 0 - 02)	1,215	830	800	795	754	697	697	708	719	720	666	658	554	544	579	891	872	841	860	852	892	816	857	861	878	873	950	994	1,010	940	943	977	1,000
CHEMICAL & ALLIED PRODUCT MFG (Tier 1 - 04)	271	240	243	251	243	221	217	227	218	230	213	207	158	145	161	262	264	255	274	273	168	165	163	155	160	158	125	127	129	102	105	107	105
Organic Chemical Mfg	70	45	52	61	57	53	50	60	61	67	54	57	48	56	57	37	38	38	42	42	18	22	22	19	20	20	21	21	21	14	15	15	18
Inorganic Chemical Mfg	201	195	191	191	186	168	167	166	156	163	159	150	110	89	104	22	19	17	18	18	12	12	10	5	6	7	6	6	6	7	7	8	8
Polymer & Resin Mfg	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	22	22	22	23	23	6	6	6	5	5	4	3	3	3	2	2	3	3
Agricultural Chemical Mfg	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	143	145	141	151	152	80	77	76	74	76	74	50	51	52	48	49	49	48
Paint, Varnish, Lacquer, Enamel Mfg	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Pharmaceutical Mfg	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Other Chemical Mfg	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	38	38	37	40	39	52	48	50	51	54	54	45	46	47	31	31	32	29
METALS PROCESSING (Tier 1 - 05)	77	72	78	88	83	73	79	76	83	82	65	70	45	49	54	87	80	75	82	83	97	76	81	83	91	98	83	89	89	86	89	94	84
Non-Ferrous Metals Processing	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	16	15	14	15	15	14	15	13	12	12	12	11	12	12	9	9	9	9
Ferrous Metals Processing	77	72	78	88	83	73	79	76	83	82	65	70	45	49	54	58	53	48	53	54	78	56	62	67	75	83	66	71	71	71	73	78	68
Metals Processing NEC	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	13	13	13	13	14	6	5	6	4	4	4	7	7	6	7	7	7	7
PETROLEUM & RELATED INDUSTRIES (Tier 1 - 06)	240	54	56	58	60	63	64	68	70	71	72	72	70	68	70	124	109	101	100	97	153	121	148	123	117	110	139	143	143	120	122	124	149
Oil & Gas Production	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	69	55	48	48	47	104	65	68	70	63	58	86	88	88	66	67	69	68
Petroleum Refineries & Related Industries	240	54	56	58	60	63	64	68	70	71	72	72	70	68	70	55	53	52	51	49	47	52	76	49	49	48	47	48	48	46	46	47	46
Asphalt Manufacturing	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	1	1	1	1	1	3	4	4	5	5	5	7	7	7	8	9	9	35
OTHER INDUSTRIAL PROCESSES (Tier 1 - 07)	187	192	201	210	204	182	198	208	220	219	205	200	179	191	203	327	328	320	315	311	378	352	361	370	389	399	433	460	467	451	479	501	487
Agriculture, Food, & Kindred Products	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	5	5	5	5	5	3	3	3	4	3	6	5	5	5	8	8	4	8
Textiles, Leather, & Apparel Products	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	1	1	1	0	0	0	0
Wood, Pulp & Paper, & Publishing Products	18	18	19	20	20	18	20	21	21	22	24	23	23	25	26	73	76	76	76	77	91	88	86	86	89	89	86	89	91	93	96	99	83
Rubber & Miscellaneous Plastic Products	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	0
Mineral Products	169	174	182	190	184	164	178	187	199	198	181	177	156	167	177	239	238	230	225	220	270	249	259	267	281	287	327	350	355	338	361	383	385
cement mfg	97	102	107	111	105	89	95	102	109	110	98	93	82	92	101	137	136	130	126	124	151	131	139	143	150	153	196	212	214	181	190	203	214
glass mfg	48	49	50	53	53	53	58	61	65	63	60	61	57	57	57	48	48	47	46	45	59	59	61	64	66	67	69	74	76	67	71	75	73
other	24	24	24	25	26	23	24	24	25	25	23	23	17	18	19	54	54	53	53	51	61	59	60	60	64	66	62	64	65	90	100	105	98
Machinery Products	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	2	2	2	2	2	3	2	2	3	6	7	2	3	3	1	1	1	1
Electronic Equipment	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	0	0
Transportation Equipment	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Miscellaneous Industrial Processes	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	8	8	7	7	7	10	10	10	9	9	10	12	12	12	11	11	12	9
SOLVENT UTILIZATION (Tier 1 - 08)	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	2	3	3	3	3	1	2	3	3	3	3	2	3	3	4	4	4	8
Degreasing	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	3
Graphic Arts	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	1	1	1	1	1	1	1	1	1	1	1	1
Dry Cleaning	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	0	0
Surface Coating	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	2	2	2	2	2	1	2	2	2	2	2	2	2	2	3	3	3	3
Other Industrial	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Nonindustrial	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	0	0
Solvent Utilization NEC	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0
STORAGE & TRANSPORT (Tier 1 - 09)	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	2	2	2	2	2	3	6	5	5	5	6	15	16	16	14	15	16	16
Bulk Terminals & Plants	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	1	1	1	1	1	2	2	2	2	2	2	0
Petroleum & Petroleum Product Storage	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	1	1	1	1	1	2	2	0	0	0	0	7	8	8	1	1	1	1
Petroleum & Petroleum Product Transport	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Service Stations: Stage I	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0
Service Stations: Stage II	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0
Organic Chemical Storage	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	1	1	1	1	1	0	2	3	3	3	4	4	4	4	3	3	3	5
Organic Chemical Transport	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	0	0
Inorganic Chemical Storage	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Bulk Materials Storage storage	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	1	1	0	0	0	0	0	1	2	2	2	8	9	9	9
WASTE DISPOSAL & RECYCLING (Tier 1 - 10)	440	271	222	189	164	159	138	129	129	118	111	109	103	91	90	87	87	85	85	84	91	95	96	123	114	99	153	157	163	162	129	130	152
Incineration	110	63	58	55	50	56	46	41	41	41	37	37	33	24	24	27	29	29	31	31	49	51	51	74	65	53	51	53	54	54	56	57	51
Open Burning	330	208	164	134	113	103	92	88	88	76	74	72	70	67	66	59	58	56	54	52	42	43	43	44	44	44	98	101	106	103	68	68	95
POTW	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	0	0
Industrial Waste Water	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	0	0
TSDF	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0	0	0
Landfills	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	1	1	1	1	2	2	2	4	4	4	4
Other	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	1	1	4	3	1	1	1	1	0	0	0	1
TRANSPORTATION TOTAL (Tier 0 - 03)	15,277	15,238	15,186	15,133	15,081	15,029	15,017	15,004	14,992	14,916	14,845	14,778	14,710	14,643	14,575	14,508	14,422	14,375	14,015	13,695	13,373	13,298	13,221	13,143	13,066	12,989	12,912	12,970	12,776	12,456	12,560	11,932	11,452
HIGHWAY VEHICLES (Tier 1 - 11)	12,624	12,523	12,407	12,292	12,176	12,061	11,948	11,835	11,722	11,605	11,493	11,381	11,268	11,156	11,044	10,932	10,820	10,707	10,336	9,964	9,592	9,449	9,306	9,162	9,019	8,876	8,733	8,792	8,619	8,371	8,394	7,774	7,365
Light-Duty Gas Vehicles & Motorcycles	8,542	8,351	8,160	7,969	7,778	7,587	7,396	7,206	7,015	6,822	6,632	6,442	6,252	6,062	5,872	5,681	5,491	5,301	4,955	4,609	4,262	4,020	3,777	3,534	3,291	3,049	2,806	2,522	2,387	2,430	2,312	2,181	2,166
light-duty gas vehicles	8,542	8,350	8,158	7,966	7,774	7,583	7,391	7,199	7,007	6,812	6,621	6,429	6,238	6,046	5,855	5,663	5,472	5,280	4,934	4,587	4,240	3,999	3,758	3,516	3,275	3,033	2,792	2,507	2,372	2,415	2,297	2,168	2,152
motorcycles	0	1	2	3	3	4	6	7	8	10	11	13	14	15	17	18	20	21	21	22	22	21	19	18	17	15	14	15	15	15	15	14	14
Light-Duty Gas Trucks	1,540	1,544	1,548	1,551	1,555	1,559	1,563	1,567	1,571	1,574	1,578	1,582	1,586	1,590	1,594	1,598	1,602	1,606	1,572	1,538	1,504	1,495	1,487	1,478	1,469	1,461	1,452	1,459	1,453	1,450	1,436	1,469	1,401
light-duty gas trucks 1	868	877	887	896	906	915	924	934	943	952	962	971	981	990	999	1,009	1,018	1,028	1,006	984	962	969	976	983	990	997	1,004	973	960	1,014	999	1,036	974
light-duty gas trucks 2	672	666	661	655	650	644	639	633	628	622	616	611	605	600	595	589	584	578	566	554	542	526	511	495	479	464	448	486	493	436	437	434	427
Heavy-Duty Gas Vehicles	723	713	703	694	684	674	664	654	644	634	624	614	604	595	585	575	565	555	559	563	567	557	547	537	527	516	506	447	417	481	453	421	404
Diesels	1,833	1,915	1,996	2,078	2,159	2,241	2,324	2,408	2,492	2,575	2,659	2,742	2,826	2,910	2,994	3,078	3,161	3,245	3,250	3,254	3,259	3,377	3,495	3,614	3,732	3,850	3,968	4,365	4,362	4,010	4,192	3,702	3,395
heavy-duty diesel vehicles	1,764	1,846	1,928	2,010	2,093	2,175	2,257	2,339	2,422	2,503	2,585	2,668	2,750	2,832	2,915	2,997	3,079	3,162	3,172	3,183	3,194	3,318	3,442	3,567	3,691	3,816	3,940	4,021	4,077	3,986	4,178	3,687	3,378
light-duty diesel trucks	70	67	65	63	61	58	56	54	52	49	47	45	43	40	38	36	34	32	29	26	23	21	19	17	15	14	12	331	274	13	6	9	9
light-duty diesel vehicles	0	2	3	5	6	8	11	15	19	22	26	30	33	37	41	44	48	52	49	46	43	38	34	29	25	21	16	13	11	12	7	7	7
OFF-HIGHWAY (Tier 1 - 12)	2,652	2,715	2,779	2,842	2,905	2,968	3,069	3,169	3,269	3,311	3,353	3,397	3,442	3,487	3,531	3,576	3,602	3,667	3,680	3,731	3,781	3,849	3,915	3,981	4,047	4,113	4,179	4,178	4,156	4,084	4,167	4,158	4,086
Non-Road Gasoline	90	93	95	97	99	102	103	104	105	107	108	109	111	112	113	114	116	117	118	120	120	125	129	133	137	141	145	163	176	204	192	190	211
recreational	4	4	5	6	7	8	8	8	8	8	8	8	8	8	8	7	7	7	7	7	7	7	8	8	8	8	9	10	10	11	10	10	11
construction	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	5	5	5	6	6	6	6	6	6
industrial	30	29	28	28	27	27	26	26	25	24	24	23	23	22	22	21	20	20	19	19	18	18	17	17	16	16	15	16	16	29	14	13	13
lawn & garden	19	20	21	23	24	25	26	27	28	29	31	32	33	34	35	36	37	38	40	41	42	44	47	50	52	55	57	68	76	73	86	86	93
farm	2	2	2	2	2	2	2	2	2	2	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	4	4	4	4	5	4	4	5
light commercial	2	3	3	4	5	5	6	6	7	8	8	9	9	10	11	11	12	13	13	14	14	16	17	18	19	20	21	26	30	32	35	35	39
logging	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1
airport service	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	2	0	0	0
railway maintenance	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
recreational marine vessels	30	30	30	30	30	30	30	30	31	31	31	31	31	31	31	31	31	31	32	32	32	32	32	33	33	33	34	34	34	45	35	36	42
Non-Road Diesel	374	430	486	542	598	653	711	769	827	885	943	1,003	1,064	1,125	1,185	1,246	1,288	1,369	1,371	1,413	1,454	1,481	1,507	1,533	1,559	1,585	1,611	1,613	1,613	1,734	1,600	1,588	1,600
recreational	0	0	0	0	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	2	2	2	2	2
construction	167	196	225	254	283	312	340	369	398	427	456	485	514	543	571	600	621	658	662	682	702	715	727	739	751	764	776	774	772	858	762	754	764
industrial	35	41	47	54	60	67	73	79	86	92	99	105	112	118	124	131	132	144	134	135	136	137	138	138	139	139	140	139	138	126	133	132	132
lawn & garden	0	0	0	0	0	0	0	0	0	0	0	2	5	7	9	11	14	16	19	21	24	26	28	31	33	35	38	40	42	38	45	46	49
farm	112	131	151	170	190	209	229	248	268	287	307	326	346	365	385	404	419	443	449	463	478	487	496	505	514	523	532	533	533	576	530	525	521
light commercial	0	1	2	3	4	5	8	11	14	17	20	23	26	28	31	34	37	40	43	46	48	51	54	57	59	62	65	67	69	73	72	74	76
logging	57	56	56	55	54	54	53	52	52	51	50	50	49	48	48	47	45	46	42	41	39	37	36	34	32	31	29	26	25	27	22	21	20
airport service	0	0	0	0	0	0	0	0	0	0	0	1	1	2	2	3	4	5	5	6	7	7	7	8	8	8	9	9	9	11	9	9	9
railway maintenance	0	0	0	0	0	0	0	0	1	1	1	1	1	1	2	2	2	2	2	2	2	2	3	3	3	3	3	3	3	3	3	3	3
recreational marine vessels	3	4	5	5	6	6	7	8	8	9	10	10	11	11	12	13	13	14	15	15	16	16	17	18	18	19	20	20	21	21	22	23	24
Aircraft	50	51	52	53	55	56	57	59	60	61	63	64	65	66	68	69	70	72	71	70	70	70	71	72	73	73	74	83	91	96	88	81	81
Marine Vessels	978	980	981	983	984	986	962	938	914	933	951	970	988	1,006	1,025	1,043	1,062	1,080	1,054	1,029	1,003	1,012	1,021	1,030	1,039	1,049	1,058	1,008	958	857	1,008	1,013	1,011
diesel	NA	NA	NA	NA	NA	NA	NA	NA	721	735	750	764	779	793	808	822	837	851	831	811	791	800	809	817	826	835	844	801	757	672	795	799	797
residual oil	NA	NA	NA	NA	NA	NA	NA	NA	194	198	201	205	209	213	217	221	225	229	223	218	212	213	213	213	213	213	213	207	200	182	214	215	214
other	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	2	NA	NA	NA
Railroads	1,136	1,130	1,125	1,119	1,114	1,108	1,164	1,220	1,275	1,230	1,185	1,139	1,094	1,048	1,003	958	912	867	893	919	945	962	979	996	1,014	1,031	1,048	1,061	1,073	939	1,001	999	889
Other	24	31	39	47	55	63	71	80	88	96	104	112	120	129	137	145	154	163	172	181	189	199	207	216	225	234	243	251	246	255	278	286	295
liquified petroleum gas	5	13	20	28	35	43	50	58	66	73	81	89	97	104	112	120	129	137	145	154	162	171	179	188	196	204	213	221	215	215	246	254	262
compressed natural gas	19	19	19	20	20	21	21	22	22	22	23	23	24	24	25	25	26	26	26	27	27	28	28	29	29	30	30	30	31	39	32	32	33
MISCELLANEOUS (Tier 0 - 04)	330	300	234	198	219	165	233	194	189	214	248	213	165	254	210	310	259	352	727	293	369	286	255	241	390	267	412	187	179	251	276	184	356
MISCELLANEOUS (Tier 1 - 13)	330	300	234	198	219	165	233	194	189	214	248	213	165	254	210	310	259	352	727	293	369	286	255	241	390	267	412	187	179	251	276	184	356
Agriculture & Forestry	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	2	NA	NA	2
agricultural livestock	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	2	NA	NA	2
Other Combustion	330	300	234	198	219	165	233	194	189	214	248	213	165	254	210	310	259	352	727	293	368	285	253	240	388	265	412	187	179	249	276	184	354
Health Services	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0	0	0	0	0	0	0
Cooling Towers	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	NA	0	0	NA	NA	NA	NA	NA	NA	NA
Fugitive Dust	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	1	1	1	1	1	1	0	0	0	0	0	0	0
Other	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	NA	NA	NA	NA

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NOx Emissions 1970-2002

NO_x Emissions 1970-2002