Air Pollution Trends in the United States

	A	B	C	D	E	F	G	H	I	J
1	Data Source : https://www.epa.gov/outdoor-air-quality-data/air-quality-statistics-report
2	Data Collection Location : United States Sampling
3	Data Notes: This data displays air pollution values related to national standards for air quality. This report includes pertinent values for all six criteria pollutants.
4	The data ranges from 1980 to 2013
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6	Air Quality Indicators
7	Carbon monoxide (ppm)- CO 2nd Max 8-hr--> NAAQS = 9 ppm
8	Nitrogen dioxide (ppb)- NO2 Mean 1-hr --> NAAQS = 53 ppb
9	Ozone (ppm)- 4th Max 8-hr --> NAAQS = 0.070ppm
10	Sulfur dioxide (ppb)- SO2 Mean 1-hr --> NAAQS = 75 ppb
11	Particulate Matter 10 (µg/m3)- PM10 Mean 24-hr --> NAAQS = 150 µg/m3
12	Lead Max (µg/m3)- 3 mo Avg --> NAAQS = 0.15 µg/m3
13	Carbon Dioxide (ppm)- annual mean atmospheric CO2 concentration measured at Mauna Loa, Hawaii
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15	Year	Carbon monoxide (ppm)	Nitrogen dioxide (ppb)	Ozone (ppm)	Sulfur dioxide (ppb)	Particulate Matter 10 µg/m3	Lead (µg/m3)	Carbon dioxide (ppm)	Total US Population (millions)	World Population (billions)
16	1980	8.92	27.85	0.105	12.06		1.57	338.68	227.2	4.45
17	1981	8.73	27.45	0.101	11.42		1.23	340.1	229.5	4.53
18	1982	8.28	26.34	0.098	10.21		1.04	341.44	231.7	4.61
19	1983	8.39	25.53	0.098	9.86		1.06	343.03	233.8	4.7
20	1984	7.87	26.08	0.097	9.92		1.03	344.58	235.8	4.77
21	1985	7.29	26.05	0.097	9.74		1.18	346.04	237.9	4.86
22	1986	7.57	26.06	0.093	9.13		0.69	347.39	240.1	4.94
23	1987	6.85	25.64	0.094	8.85		0.9	349.16	242.3	5.03
24	1988	6.71	26.49	0.098	9.17	93.85	1.14	351.56	244.5	5.11
25	1989	6.78	25.72	0.097	8.81	98.14	0.58	353.07	246.8	5.2
26	1990	6.34	24.28	0.095	8.39	89.39	0.39	354.35	249.6	5.29
27	1991	6.02	24.23	0.09	8.31	88.01	0.37	355.57	253	5.37
28	1992	5.49	23.1	0.088	7.77	77.1	0.32	356.38	256.5	5.46
29	1993	5.22	22.46	0.087	7.77	74.81	0.28	357.07	259.9	5.54
30	1994	5.34	23.59	0.086	7.54	73.14	0.41	358.82	263.1	5.62
31	1995	4.8	22.69	0.088	5.95	73.04	0.29	360.8	266.3	5.7
32	1996	4.45	22.08	0.088	5.93	66.29	0.26	362.59	269.4	5.78
33	1997	4.07	20.99	0.087	5.86	67.54	0.23	363.71	272.7	5.86
34	1998	3.96	21.03	0.087	5.66	63.9	0.23	366.65	275.9	5.94
35	1999	3.97	21.75	0.087	5.29	71.03	0.25	368.33	279	6.01
36	2000	3.47	20.2	0.086	5.06	66.43	0.24	369.52	282.2	6.09
37	2001	3.29	20.18	0.085	4.71	66.54	0.29	371.13	285	6.17
38	2002	2.83	19.37	0.085	4.26	64.14	0.21	373.22	287.6	6.24
39	2003	2.66	18.68	0.085	4.21	68.08	0.17	375.77	290.1	6.32
40	2004	2.49	17.23	0.082	4.12	57.51	0.27	377.49	292.8	6.4
41	2005	2.25	17	0.079	4.23	61.2	0.25	379.8	295.5	6.47
42	2006	2.2	16.14	0.078	3.74	61.32	0.16	381.9	298.4	6.55
43	2007	1.93	15.51	0.08	3.68	63.13	0.17	383.76	301.2	6.63
44	2008	1.74	14.67	0.078	3.15	59.57	0.29	385.59	304.1	6.71
45	2009	1.68	13.63	0.075	2.39	52.69	0.13	387.37	306.8	6.79
46	2010	1.58	13.1	0.073	2.33	53.65	0.11	389.85	308.1	6.87
47	2011	1.66	12.84	0.073	1.99	56.33	0.13	391.63	310.5	6.94
48	2012	1.53	12.4	0.075	1.77	53.33	0.14	393.82	312.9	7.02
49	2013	1.45	11.78	0.073	1.52	57.35	0.13	396.48	315.2	7.1
50	2014							398.61	317.7	7.18
51	2015							400.83	320.2
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