Liberty

Site Operator: Missouri Department of Natural Resources' Environmental Services Program

Pollutants Monitored: Ozone (O3), Nitrogen Dioxide (NO2), Inhalable Particulate (PM2.5)

Ozone (O3)

Updated: Monthly April through October.

National Ambient Air Monitoring Standard:

8-hour Standard
The three-year average of the fourth highest daily maximum 8-hour average must not be greater than .08 ppm (parts per million). Data reported in three decimal places must be rounded to two decimal places.

1-hour Standard 1970 to 1997-no longer applies to any area in Missouri.
A one-hour average of 0.12 ppm (parts per million).

Exceedances allowed without a violation being recorded:
The term exceedance does not apply to the eight-hour standard. The three-year average is used to determine designation of attainment or non-attainment.

DISCLAIMER: Yearly and quarterly data shown below has been subject to data review and validation procedures by the reporting agency. Monthly data and data shown graphically is raw, unreviewed and unvalidated data.

The units for all averages in this chart are parts per million.
YEAR	NUMBER OF DAYS OVER STANDARD	MAXIMUM 1-HOUR AVERAGE	MAXIMUM 8-HOUR AVERAGE	Fourth MAXIMUM 8-HOUR AVERAGE
1993	1	.128	not available	not available
1994	0	.115	not available	not available
1995	3	.161	not available	not available
1996	0	.124	not available	not available
1997	1	.133	not available	not available
1998	2	.141	not available	not available
1999	0	.115	not available	not available
2000	0	.117	not available	not available
2001	0	.110	not available	not available
2002	5	.119	.102	.087
2003	7	.115	.099	.088
2004	0	.087	.077	.071
2005	6	.107	.091	.088
2006	10	.121	.106	.093
2007	2	.111	.099	.081
2008
FIRST QUARTER	not available	.073	.066	.064
SECOND QUARTER	0
THIRD QUARTER	not available

Graph of Recent Ozone (O3) Data
Graph of O3 PPM.

Nitrogen Dioxide (NO2)

Updated: Monthly.

National Ambient Air Monitoring Standard: An annual average of 0.053 ppm (parts per million).

Exceedances allowed without a violation being recorded: None.

The units for all averages in this chart are parts per million.
YEAR	NUMBER OF EXCEEDANCES	ANNUAL AVERAGE	MAXIMUM 1-HOUR AVERAGE
1993	0	.009	.069
1994	0	.008	.064
1995	0	.009	.073
1996	0	.009	.063
1997	0	.009	.053
1998	0	.009	.048
1999	0	.009	.058
2000	0	.009	.051
2001	0	.008	.053
2002	0	.0078	.053
2003	0	.0074	.050
2004	0	.0066	.053
2005	0	.0067	.045
2006	0	.0069	.042
2007	0	.0065	.053
2008
THROUGH SECOND QUARTER	0	.0056	.053

Graph of Recent Nitrogen Dioxide (NO2) Data
Graph of NO2 PPM.

Inhalable Particulate (PM2.5)

Updated: Within 90 days after the end of a quarter.

National Ambient Air Monitoring Standard: (24-hour samples; one taken every third day) A three-year average of the 98th percentile 24-hour averages equal or greater than 35 ug/m³ (micrograms per cubic meter) and/or a three-year average of annual averages equal or greater than 15.0 ug/m³ (micrograms per cubic meter).

Exceedances allowed without a violation being recorded: Two percent of daily observations

The units for all averages in this chart are micrograms per cubic meter.
YEAR	FIRST MAXIMUM 24-HOUR AVERAGE	SECOND MAXIMUM 24-HOUR AVERAGE	ANNUAL AVERAGE
1999	28.9	27.9	11.18
2000	32.8	28.2	11.06
2001	32.1	31.5	12.3
2002	38.6	33.1	13.3
2003	41.8	33.9	11.7
2004	32.8	27.8	9.46
2005	34.1	32.6	12.21
2006	27.3	26.0	10.49
2007	31.3	30.0	11.07
2008
THROUGH SECOND QUARTER	28.2	19.1	9.97