Peak Daily One-Hour Ozone Averages for November 2008

The table below lists the peak daily one-hour ozone concentrations measured in November 2008 in each community where the DAQEM measures ozone. Concentrations are color-highlighted based on the EPA-defined Air Quality Index colors. (See Interpreting the AQI.) All ozone measurements are in parts per billion, and are truncated to an integer number.

The values that go into this table are calculated at 3:30 am each morning. Therefore, the current day will almost always have very low hourly averages that are not truly representative of local conditions for the day. Because of this, the report does not display the current day's data.

Use the selection boxes below to customize this report. You may select a different month, a different year, a different report format, and whether or not to include time on the report. Click on the Generate Report button once you have made your selections.

Month:	Year:	Report Format:	Include time:
			Include time
Highlight using AQI colors

Area	Monitoring Site	POC	November 2008																				POC	Monitoring Site
Area	Monitoring Site	POC	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	POC	Monitoring Site
Clark County
	E. Craig Road	1 ^N	37	36	42	38	36	30	30	31	37	26	31	28	28	40	38	35	23	22	23	30	1	E. Craig Road
	Apex	1 ^N	39	38	49	44	40	38	35	35	43	37	37	31	31	43	43	36	34	38	40	38	1	Apex
	Mesquite	1 ^N	32	40	45	51	37	39	37	34	41	38	33	35	27	49	44	41	31	31	36	34	1	Mesquite
	Paul Meyer	1 ^N	28	41	49	44	42	31	32	31	NA	33	27	23	29	45	42	37	23	28	28	27	1	Paul Meyer
	Walter Johnson	1 ^N	29	42	49	42	42	29	30	30	40	29	30	26	29	45	42	33	27	30	29	26	1	Walter Johnson
	Lone Mountain	1 ^N	31	41	47	44	42	31	33	31	41	33	32	30	33	47	44	36	26	29	28	25	1	Lone Mountain
	Palo Verde	1 ^N	31	41	48	42	42	29	31	29	41	30	32	24	31	47	46	36	27	27	28	28	1	Palo Verde
	Joe Neal	1 ^N	35	41	46	75	39	32	33	33	41	32	33	29	34	44	40	37	29	29	29	29	1	Joe Neal
	Winterwood	1 ^N	36	38	45	42	39	37	33	33	40	30	34	30	22	43	42	36	25	27	20	24	1	Winterwood
	Boulder City	1 ^N	38	44	51	45	42	39	37	35	42	38	36	32	29	47	46	38	30	36	41	34	1	Boulder City
	Jean	1 ^N	35	46	53	47	43	36	36	36	42	36	40	37	36	45	44	41	36	35	42	32	1	Jean
	Orr	1 ^N	35	37	44	41	39	36	34	31	39	26	31	30	22	41	41	36	27	25	NA	NA	1	Orr
	JD Smith	1 ^N	29	33	39	37	34	30	27	24	35	20	27	25	16	39	34	26	21	22	21	5	1	JD Smith
NA - Data not available.
^N - Data from this instrument does not meet EPA quality assurance criteria and cannot be used for regulatory purposes.

Interpreting the AQI

Air Quality Index

Each NAAQS pollutant has a separate AQI scale, with an AQI rating of 100 corresponding to the concentration of the Federal Standard for that pollutant. Additional information about the AQI and how it can be used is available from the EPA Exit

Place your mouse pointer over the scale displayed above to view information about the Air Quality Index, and each of the rating levels.

The actual index calculation is different for each parameter measured and is specified by the EPA. The following table shows the various breakpoints used in calculating the AQI.

AQI Breakpoint Definitions
AQI Range	1hr Ozone in ppm	8hr Ozone in ppm	8hr Carbon Monoxide in ppm	24hr Sulfur Dioxide in ppm	24hr PM-10 in ug/m3	24hr PM-2.5 in ug/m3
0 - 50	Not Defined	0 - 0.059	0 - 4.4	0 - 0.034	0 - 54	0 - 15.4
51 - 100	Not Defined	0.06 - 0.075	4.5 - 9.4	0.035 - 0.144	55 - 154	15.5 - 40.4
101 - 150	0.125 - 0.164	0.076 - 0.095	9.5 - 12.4	0.145 - 0.224	155 - 254	40.5 - 65.4
151 - 200	0.165 - 0.204	0.096 - 0.115	12.5 - 15.4	0.225 - 0.304	255 - 354	65.5 - 150.4
201 - 300	0.205 - 0.404	0.116 - 0.374	15.5 - 30.4	0.305 - 0.604	355 - 424	150.5 - 250.4
301 - 400	0.405 - 0.504	Not Defined	30.5 - 40.4	0.605 - 0.804	425 - 504	250.5 - 350.4
401 - 500	0.505 - 0.604	Not Defined	40.5 - 50.4	0.805 - 1.004	505 - 604	350.5 - 500.4
500	Not Defined	Not Defined	Not Defined	Not Defined	605 - 4999	500.5 - 999.9