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Tyler-Longview-Marshall Region Monitor Summary

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Parameter Monitored POC First Valid Data Monitor Status
Longview C19/A127/C644
    Sulfur Dioxide 3 R May 26, 1999 Active
Nitric Oxide 1 Jun 18, 1998 Active
Nitrogen Dioxide 1 R Jun 18, 1998 Active
Oxides of Nitrogen 1 Jun 18, 1998 Active
Total Non-Methane Organic Compounds 1 Jun 28, 2005 Deactivated Mar 30, 2010
Methane 1 Jun 29, 2005 Deactivated Mar 30, 2010
Ozone 2 R Nov 5, 1997 Active
Wind Speed 1 Nov 5, 1997 Active
Resultant Wind Speed 1 Nov 5, 1997 Active
Resultant Wind Direction 1 Nov 5, 1997 Active
Maximum Wind Gust 1 Nov 5, 1997 Active
Standard Deviation of Horizontal Wind Direction 1 Nov 5, 1997 Active
Outdoor Temperature 1 Nov 5, 1997 Active
Solar Radiation 1 Jun 10, 2004 Active
Precipitation 1 Apr 26, 2005 Active
Cypress River Airport C50  Deactivated: Mar 22, 2001
    Nitric Oxide 1 Apr 27, 1998 Deactivated Mar 22, 2001
Nitrogen Dioxide 1 R Apr 27, 1998 Deactivated Mar 22, 2001
Oxides of Nitrogen 1 Apr 27, 1998 Deactivated Mar 22, 2001
Ozone 1 R Apr 23, 1998 Deactivated Mar 21, 2001
Wind Speed 1 Apr 23, 1998 Deactivated Mar 22, 2001
Resultant Wind Speed 1 Apr 23, 1998 Deactivated Mar 22, 2001
Resultant Wind Direction 1 Apr 23, 1998 Deactivated Mar 22, 2001
Maximum Wind Gust 1 Apr 23, 1998 Deactivated Mar 22, 2001
Standard Deviation of Horizontal Wind Direction 1 Apr 23, 1998 Deactivated Mar 22, 2001
Outdoor Temperature 1 Apr 23, 1998 Deactivated Mar 22, 2001
Tyler Airport Relocated C82
    Sulfur Dioxide 1 N Mar 3, 2010 Active
Nitric Oxide 1 May 26, 2000 Active
Nitrogen Dioxide 1 R May 26, 2000 Active
Oxides of Nitrogen 1 May 26, 2000 Active
Ozone 1 R May 26, 2000 Active
Wind Speed 1 May 25, 2000 Active
Resultant Wind Speed 1 May 25, 2000 Active
Resultant Wind Direction 1 May 25, 2000 Active
Maximum Wind Gust 1 May 25, 2000 Active
Standard Deviation of Horizontal Wind Direction 1 May 25, 2000 Active
Outdoor Temperature 1 May 25, 2000 Active
Solar Radiation 1 Aug 19, 2002 Active
Karnack C85/AFHP303
    Nitric Oxide 1 Sep 5, 2001 Active
Nitrogen Dioxide 1 R Sep 5, 2001 Active
Oxides of Nitrogen 1 Sep 5, 2001 Active
Ozone 1 R Sep 6, 2001 Active
Wind Speed 1 Aug 31, 2001 Active
Resultant Wind Speed 1 Aug 31, 2001 Active
Resultant Wind Direction 1 Aug 31, 2001 Active
Maximum Wind Gust 1 Aug 28, 2001 Active
Standard Deviation of Horizontal Wind Direction 1 Aug 31, 2001 Active
Outdoor Temperature 1 Aug 28, 2001 Active
Visibility 1 Sep 6, 2001 Active
Solar Radiation 1 Aug 19, 2002 Active
PM-2.5 (Local Conditions) 3 N Sep 6, 2001 Deactivated Jan 1, 2007
PM-2.5 (Local Conditions) Acceptable 3 Jan 1, 2007 Active
Tyler Airport C86  Deactivated: May 17, 2000
    Nitric Oxide 1 Jun 3, 1999 Deactivated May 17, 2000
Nitrogen Dioxide 1 R Jun 3, 1999 Deactivated May 17, 2000
Oxides of Nitrogen 1 Jun 3, 1999 Deactivated May 17, 2000
Ozone 1 R Nov 4, 1997 Deactivated May 17, 2000
Wind Speed 1 Nov 4, 1997 Deactivated May 17, 2000
Resultant Wind Speed 1 Nov 4, 1997 Deactivated May 17, 2000
Resultant Wind Direction 1 Nov 4, 1997 Deactivated May 17, 2000
Maximum Wind Gust 1 Nov 4, 1997 Deactivated May 17, 2000
Standard Deviation of Horizontal Wind Direction 1 Nov 4, 1997 Deactivated May 17, 2000
Outdoor Temperature 1 Nov 4, 1997 Deactivated May 17, 2000
Winona C133  Deactivated: Apr 1, 1997
    Wind Speed 1 Dec 31, 1996 Deactivated Mar 19, 1997
Resultant Wind Speed 1 Dec 31, 1996 Deactivated Mar 19, 1997
Resultant Wind Direction 1 Dec 31, 1996 Deactivated Mar 19, 1997
Standard Deviation of Horizontal Wind Direction 1 Dec 31, 1996 Deactivated Mar 19, 1997
Outdoor Temperature 1 Dec 31, 1996 Deactivated Mar 19, 1997
Relative Humidity 1 Dec 31, 1996 Deactivated Mar 19, 1997
Longview Big Woods C605  Deactivated: Oct 22, 2001
    Nitric Oxide 1 Aug 31, 2000 Deactivated Oct 22, 2001
Nitrogen Dioxide 1 R May 15, 2001 Deactivated Oct 22, 2001
Oxides of Nitrogen 1 Aug 31, 2000 Deactivated Oct 22, 2001
Ozone 1 R Aug 30, 2000 Deactivated Oct 22, 2001
Wind Speed 1 Aug 22, 2000 Deactivated Oct 22, 2001
Resultant Wind Speed 1 Aug 22, 2000 Deactivated Oct 22, 2001
Resultant Wind Direction 1 Aug 22, 2000 Deactivated Oct 22, 2001
Maximum Wind Gust 1 Aug 22, 2000 Deactivated Oct 22, 2001
Standard Deviation of Horizontal Wind Direction 1 Aug 22, 2000 Deactivated Oct 22, 2001
Waskom C612  Deactivated: Oct 21, 2003
    Nitric Oxide 1 May 30, 2002 Deactivated Oct 20, 2003
Nitrogen Dioxide 1 R May 30, 2002 Deactivated Oct 20, 2003
Oxides of Nitrogen 1 May 30, 2002 Deactivated Oct 20, 2003
Ozone 1 R May 30, 2002 Deactivated Oct 20, 2003
Wind Speed 1 May 30, 2002 Deactivated Oct 20, 2003
Resultant Wind Speed 1 May 30, 2002 Deactivated Oct 20, 2003
Resultant Wind Direction 1 May 30, 2002 Deactivated Oct 20, 2003
Maximum Wind Gust 1 May 30, 2002 Deactivated Oct 20, 2003
Standard Deviation of Horizontal Wind Direction 1 May 30, 2002 Deactivated Oct 20, 2003
Panola C627  Deactivated: Oct 30, 2006
    Sulfur Dioxide 1 R Apr 29, 2005 Deactivated Oct 29, 2006
Nitric Oxide 1 Jul 14, 2004 Deactivated Oct 29, 2006
Nitrogen Dioxide 1 R Jul 14, 2004 Deactivated Oct 29, 2006
Oxides of Nitrogen 1 Jul 14, 2004 Deactivated Oct 29, 2006
Ozone 1 N Jul 13, 2004 Deactivated Oct 29, 2006
Wind Speed 1 Jul 9, 2004 Deactivated Oct 29, 2006
Resultant Wind Speed 1 Jul 9, 2004 Deactivated Oct 29, 2006
Resultant Wind Direction 1 Jul 9, 2004 Deactivated Oct 29, 2006
Maximum Wind Gust 1 Jul 9, 2004 Deactivated Oct 29, 2006
Standard Deviation of Horizontal Wind Direction 1 Jul 9, 2004 Deactivated Oct 29, 2006
Wamba NTRD C645  Deactivated: Nov 7, 2006
    Ozone 1 N Jul 22, 2005 Deactivated Nov 5, 2006
Wind Speed 1 Oct 6, 2005 Deactivated Nov 5, 2006
Resultant Wind Speed 1 Oct 6, 2005 Deactivated Nov 5, 2006
Resultant Wind Direction 1 Oct 6, 2005 Deactivated Nov 5, 2006
Maximum Wind Gust 1 Jul 20, 2005 Deactivated Nov 5, 2006
Standard Deviation of Horizontal Wind Direction 1 Oct 6, 2005 Deactivated Nov 5, 2006
Outdoor Temperature 1 Jul 20, 2005 Deactivated Nov 5, 2006
Dew Point Temperature 1 Jul 20, 2005 Deactivated Nov 5, 2006
Relative Humidity 1 Jul 20, 2005 Deactivated Nov 5, 2006
Palestine C647  Deactivated: Oct 25, 2006
    Ozone 1 N Jul 28, 2005 Deactivated Oct 25, 2006
Wind Speed 1 Jul 28, 2005 Deactivated Aug 3, 2005
Resultant Wind Speed 1 Jul 28, 2005 Deactivated Aug 3, 2005
Resultant Wind Direction 1 Jul 28, 2005 Deactivated Aug 3, 2005
Maximum Wind Gust 1 Jul 27, 2005 Deactivated Aug 3, 2005
Standard Deviation of Horizontal Wind Direction 1 Jul 28, 2005 Deactivated Aug 3, 2005
Outdoor Temperature 1 Jul 27, 2005 Deactivated Aug 3, 2005
Relative Humidity 1 Jul 27, 2005 Deactivated Aug 3, 2005
Clarksville NTRD C648/C668  Deactivated: Dec 15, 2006
    Carbon Monoxide 1 N Oct 2, 2006 Deactivated Dec 14, 2006
Sulfur Dioxide 1 N Aug 2, 2006 Deactivated Dec 14, 2006
NOy 2 Aug 1, 2006 Deactivated Dec 14, 2006
Nitric Oxide 1 Aug 2, 2006 Deactivated Dec 14, 2006
Nitric Oxide 2 Aug 1, 2006 Deactivated Dec 14, 2006
Nitrogen Dioxide 1 N Aug 2, 2006 Deactivated Dec 14, 2006
Oxides of Nitrogen 1 Aug 2, 2006 Deactivated Dec 14, 2006
Ozone 1 N Jul 29, 2005 Deactivated Dec 14, 2006
Wind Speed 1 Jul 26, 2005 Deactivated Dec 14, 2006
Resultant Wind Speed 1 Jul 26, 2005 Deactivated Dec 14, 2006
Resultant Wind Direction 1 Jul 26, 2005 Deactivated Dec 14, 2006
Maximum Wind Gust 1 Jul 26, 2005 Deactivated Dec 14, 2006
Standard Deviation of Horizontal Wind Direction 1 Jul 26, 2005 Deactivated Dec 14, 2006
Outdoor Temperature 1 Jul 26, 2005 Deactivated Dec 14, 2006
Dew Point Temperature 1 Jul 26, 2005 Deactivated Dec 14, 2006
Relative Humidity 1 Jul 26, 2005 Deactivated Dec 14, 2006
Texarkana New Boston C1031
    Wind Speed 1 Feb 25, 2016 Active
Resultant Wind Speed 1 Feb 25, 2016 Active
Resultant Wind Direction 1 Feb 25, 2016 Active
Maximum Wind Gust 1 Feb 25, 2016 Active
Standard Deviation of Horizontal Wind Direction 1 Feb 25, 2016 Active
Outdoor Temperature 1 Feb 25, 2016 Active
PM-2.5 (Local Conditions) 2 R Jan 9, 2019 Active
PM-2.5 (Local Conditions) Acceptable 3 Mar 17, 2016 Deactivated Jan 8, 2019
Cookville FM 4855 C1078
    Sulfur Dioxide 1 R Oct 4, 2016 Active
Wind Speed 1 Sep 30, 2016 Active
Resultant Wind Speed 1 Sep 30, 2016 Active
Resultant Wind Direction 1 Sep 30, 2016 Active
Maximum Wind Gust 1 Sep 30, 2016 Active
Standard Deviation of Horizontal Wind Direction 1 Sep 30, 2016 Active
Outdoor Temperature 1 Sep 30, 2016 Active
Hallsville Red Oak Road C1079
    Sulfur Dioxide 1 R Oct 27, 2016 Active
Wind Speed 1 Oct 25, 2016 Active
Resultant Wind Speed 1 Oct 25, 2016 Active
Resultant Wind Direction 1 Oct 25, 2016 Active
Maximum Wind Gust 1 Oct 25, 2016 Active
Standard Deviation of Horizontal Wind Direction 1 Oct 25, 2016 Active
Outdoor Temperature 1 Oct 25, 2016 Active
Tatum CR 2181d Martin Creek Lake C1082
    Sulfur Dioxide 1 R Oct 31, 2017 Active
Wind Speed 1 Nov 1, 2017 Active
Resultant Wind Speed 1 Nov 1, 2017 Active
Resultant Wind Direction 1 Nov 1, 2017 Active
Maximum Wind Gust 1 Nov 1, 2017 Active
Standard Deviation of Horizontal Wind Direction 1 Nov 1, 2017 Active
Outdoor Temperature 1 Nov 1, 2017 Active
 R - Data from this instrument meets EPA quality assurance criteria for regulatory purposes.
 N - Data from this instrument does not meet EPA quality assurance criteria and cannot be used for regulatory purposes.

PLEASE NOTE:  This data has not been verified by the TCEQ and may change. This is the most current data, but it is not official until it has been certified by our technical staff. Data is collected from TCEQ ambient monitoring sites and may include data collected by other outside agencies. This data is updated hourly. All times shown are in local standard time unless otherwise indicated.

Following EPA reporting guidelines, negative values may be displayed in our hourly criteria air quality data, down to the negative of the EPA listed Method Detection Limit (MDL) for the particular instrument that made the measurements. The reported concentrations can be negative due to zero drift in the electronic instrument output, data logger channel, or calibration adjustments to the data. Prior to 1/1/2013, slightly negative values were automatically set to zero.