Bonne Terre - MoDNR

Bonne Terre Area Site

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

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

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 8-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
1996	1	.126	not available	not available
1997	0	.108	not available	not available
1998	0	.106	not available	not available
1999	0	.121	not available	not available
2000	0	.121	not available	not available
2001	0	.114	not available	not available
2002	8	.105	.094	.092
2003	3	.112	.098	.083
2004	0	.078	.073	.070
2005	2	.120	.093	.084
2006	1	.106	.091	.077
2007	8	.109	.098	.089
2008
FIRST QUARTER	not available	not available	not available	not available
SECOND QUARTER	not available
THIRD QUARTER	not available

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

Nitrogen Dioxide (NO2)

Updated: Monthly April through October.

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
1996	0	.004	.033
1997	0	.004	.028
1998	0	.004	.036
1999	0	.004	.026
2000	0	.004	.026
2001	0	.003	.020
2002	0	.0037	.025
2003	0	.0041	.035
2004	0	.0035	.033
2005	0	.0038	.031
2006	0	.0035	.023
2007	0	.0036	.033
2008
THROUGH FIRST QUARTER	not available	not available	not available

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
2004	33.8	29.8	12.39
2005	36.4	34.6	13.39
2006	60.5	33.1	11.53
2007	37.9	32.7	11.3
2008(TEOM) (Instrument removed )

Graph of Recient (PM2.5) Real Time Data
Graph of NO2 PPM.