Northwest Harris County
Site ID: 48-201-0029 · 30.0395°N, 95.6740°W
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Monitors
| Parameter | POC | First Year | Last Sample |
|---|---|---|---|
| Nitric oxide (NO) | 1 | 1997 | 2025-08-31 |
| Nitrogen dioxide (NO2) | 1 | 1997 | 2025-08-31 |
| Oxides of nitrogen (NOx) | 1 | 1997 | 2025-08-31 |
| Sum of PAMS target compounds | 2 | 2000 | 2003-12-31 |
| Sum of PAMS target compounds | 3 | 2000 | 2003-10-15 |
| Total NMOC (non-methane organic compound) | 1 | 1998 | 1998-10-26 |
| Total NMOC (non-methane organic compound) | 2 | 1998 | 2013-05-28 |
| Total NMOC (non-methane organic compound) | 3 | 1998 | 2009-07-02 |
| 1-Hexene & 2-Methyl-1-pentene | 2 | 2000 | 2013-05-28 |
| 1-Hexene & 2-Methyl-1-pentene | 3 | 2000 | 2009-07-02 |
| Ethane | 1 | 1998 | 1998-10-26 |
| Ethane | 2 | 1998 | 2013-05-28 |
| Ethane | 3 | 1998 | 2009-07-02 |
| Ethylene | 1 | 1998 | 1998-10-26 |
| Ethylene | 2 | 1998 | 2013-05-28 |
| Ethylene | 3 | 1998 | 2009-07-02 |
| Propane | 1 | 1998 | 1998-10-26 |
| Propane | 2 | 1998 | 2013-05-28 |
| Propane | 3 | 1998 | 2009-07-02 |
| Propylene | 1 | 1998 | 1998-10-26 |
| Propylene | 2 | 1998 | 2013-05-28 |
| Propylene | 3 | 1998 | 2009-07-02 |
| Acetylene | 1 | 1998 | 1998-10-26 |
| Acetylene | 2 | 1998 | 2013-05-28 |
| Acetylene | 3 | 1998 | 2009-07-02 |
| Ethyl acetate | 1 | ||
| Ethyl acetate | 2 | 2004 | 2008-08-16 |
| Ethyl acetate | 3 | 2004 | 2008-08-09 |
| n-Butane | 1 | 1998 | 1998-10-26 |
| n-Butane | 2 | 1998 | 2013-05-28 |
| n-Butane | 3 | 1998 | 2009-07-02 |
| Isobutane | 1 | 1998 | 1998-10-26 |
| Isobutane | 2 | 1998 | 2013-05-28 |
| Isobutane | 3 | 1998 | 2009-07-02 |
| trans-2-Butene | 1 | 1998 | 1998-10-26 |
| trans-2-Butene | 2 | 1998 | 2013-05-28 |
| trans-2-Butene | 3 | 1998 | 2009-07-02 |
| cis-2-Butene | 1 | 1998 | 1998-10-26 |
| cis-2-Butene | 2 | 1998 | 2013-05-28 |
| cis-2-Butene | 3 | 1998 | 2009-07-02 |
| 1,3-Butadiene | 1 | 1998 | 1998-10-26 |
| 1,3-Butadiene | 2 | 1998 | 2013-05-28 |
| 1,3-Butadiene | 3 | 1998 | 2009-07-02 |
| n-Pentane | 1 | 1998 | 1998-10-26 |
| n-Pentane | 2 | 1998 | 2013-05-28 |
| n-Pentane | 3 | 1998 | 2009-07-02 |
| Isopentane | 1 | 1998 | 1998-10-26 |
| Isopentane | 2 | 1998 | 2013-05-28 |
| Isopentane | 3 | 1998 | 2009-07-02 |
| 1-Pentene | 1 | 1998 | 1998-10-26 |
| 1-Pentene | 2 | 1998 | 2013-05-28 |
| 1-Pentene | 3 | 1998 | 2009-07-02 |
| trans-2-Pentene | 1 | 1998 | 1998-10-26 |
| trans-2-Pentene | 2 | 1998 | 2013-05-28 |
| trans-2-Pentene | 3 | 1998 | 2009-07-02 |
| cis-2-Pentene | 1 | 1998 | 1998-10-26 |
| cis-2-Pentene | 2 | 1998 | 2013-05-28 |
| cis-2-Pentene | 3 | 1998 | 2009-07-02 |
| 2-Methyl-2-butene | 1 | 1998 | 1998-10-26 |
| 2-Methyl-2-butene | 2 | 1998 | 2013-05-28 |
| 2-Methyl-2-butene | 3 | 1998 | 2009-07-02 |
| 3-Methylpentane | 1 | 1998 | 1998-10-26 |
| 3-Methylpentane | 2 | 1998 | 2013-05-28 |
| 3-Methylpentane | 3 | 1998 | 2009-07-02 |
| n-Hexane | 1 | 1998 | 1998-10-26 |
| n-Hexane | 2 | 1998 | 2013-05-28 |
| n-Hexane | 3 | 1998 | 2009-07-02 |
| n-Heptane | 1 | 1998 | 1998-10-26 |
| n-Heptane | 2 | 1998 | 2013-05-28 |
| n-Heptane | 3 | 1998 | 2009-07-02 |
| n-Octane | 1 | 1998 | 1998-10-26 |
| n-Octane | 2 | 1998 | 2013-05-28 |
| n-Octane | 3 | 1998 | 2009-07-02 |
| 4-Methyl-1-pentene | 1 | 1998 | 1998-10-26 |
| 4-Methyl-1-pentene | 2 | 1998 | 2013-05-28 |
| 4-Methyl-1-pentene | 3 | 1998 | 2009-07-02 |
| n-Nonane | 1 | 1998 | 1998-10-26 |
| n-Nonane | 2 | 1998 | 2013-05-28 |
| n-Nonane | 3 | 1998 | 2009-07-02 |
| n-Decane | 1 | 1998 | 1998-10-26 |
| n-Decane | 2 | 1998 | 2013-05-28 |
| n-Decane | 3 | 1998 | 2009-07-02 |
| Cyclopentane | 1 | 1998 | 1998-10-26 |
| Cyclopentane | 2 | 1998 | 2013-05-28 |
| Cyclopentane | 3 | 1998 | 2009-07-02 |
| Isoprene | 1 | 1998 | 1998-10-26 |
| Isoprene | 2 | 1998 | 2013-05-28 |
| Isoprene | 3 | 1998 | 2009-07-02 |
| 2,2-Dimethylbutane | 1 | 1998 | 1998-10-26 |
| 2,2-Dimethylbutane | 2 | 1998 | 2013-05-28 |
| 2,2-Dimethylbutane | 3 | 1998 | 2009-07-02 |
| 2-Methyl-1-pentene | 1 | 1998 | 1998-10-26 |
| 2-Methyl-1-pentene | 2 | 1998 | 2000-10-27 |
| 2-Methyl-1-pentene | 3 | 1998 | 2000-10-05 |
| 2,4-Dimethylpentane | 1 | 1998 | 1998-10-26 |
| 2,4-Dimethylpentane | 2 | 1998 | 2013-05-28 |
| 2,4-Dimethylpentane | 3 | 1998 | 2009-07-02 |
| Cyclohexane | 1 | 1998 | 1998-10-26 |
| Cyclohexane | 2 | 1998 | 2013-05-28 |
| Cyclohexane | 3 | 1998 | 2009-07-02 |
| 3-Methylhexane | 1 | 1998 | 1998-10-26 |
| 3-Methylhexane | 2 | 1998 | 2013-05-28 |
| 3-Methylhexane | 3 | 1998 | 2009-07-02 |
| 2,2,4-Trimethylpentane | 1 | 1998 | 1998-10-26 |
| 2,2,4-Trimethylpentane | 2 | 1998 | 2013-05-28 |
| 2,2,4-Trimethylpentane | 3 | 1998 | 2009-07-02 |
| 2,3,4-Trimethylpentane | 1 | 1998 | 1998-10-26 |
| 2,3,4-Trimethylpentane | 2 | 1998 | 2013-05-28 |
| 2,3,4-Trimethylpentane | 3 | 1998 | 2009-07-02 |
| 3-Methylheptane | 1 | 1998 | 1998-10-26 |
| 3-Methylheptane | 2 | 1998 | 2013-05-28 |
| 3-Methylheptane | 3 | 1998 | 2009-07-02 |
| Methylcyclohexane | 1 | 1998 | 1998-10-26 |
| Methylcyclohexane | 2 | 1998 | 2013-05-28 |
| Methylcyclohexane | 3 | 1998 | 2009-07-02 |
| Methylcyclopentane | 1 | 1998 | 1998-10-26 |
| Methylcyclopentane | 2 | 1998 | 2013-05-28 |
| Methylcyclopentane | 3 | 1998 | 2009-07-02 |
| 2-Methylhexane | 1 | 1998 | 1998-10-26 |
| 2-Methylhexane | 2 | 1998 | 2013-05-28 |
| 2-Methylhexane | 3 | 1998 | 2009-07-02 |
| 1-Butene | 1 | 1998 | 1998-10-26 |
| 1-Butene | 2 | 1998 | 2013-05-28 |
| 1-Butene | 3 | 1998 | 2009-07-02 |
| 3-Methyl-1-butene | 1 | 1998 | 1998-10-26 |
| 3-Methyl-1-butene | 2 | 1998 | 2013-05-28 |
| 3-Methyl-1-butene | 3 | 1998 | 2009-07-02 |
| Cyclopentene | 2 | 1999 | 2013-05-28 |
| Cyclopentene | 3 | 1999 | 2009-07-02 |
| 2,3-Dimethylbutane | 1 | 1998 | 1998-10-26 |
| 2,3-Dimethylbutane | 2 | 1998 | 2013-05-28 |
| 2,3-Dimethylbutane | 3 | 1998 | 2009-07-02 |
| 2-Methylpentane | 1 | 1998 | 1998-10-26 |
| 2-Methylpentane | 2 | 1998 | 2013-05-28 |
| 2-Methylpentane | 3 | 1998 | 2009-07-02 |
| trans-2-Hexene | 1 | 1998 | 1998-10-26 |
| trans-2-Hexene | 2 | 1998 | 2013-05-28 |
| trans-2-Hexene | 3 | 1998 | 2009-07-02 |
| cis-2-Hexene | 1 | 1998 | 1998-10-26 |
| cis-2-Hexene | 2 | 1998 | 2013-05-28 |
| cis-2-Hexene | 3 | 1998 | 2009-07-02 |
| 2,3-Dimethylpentane | 1 | 1998 | 1998-10-26 |
| 2,3-Dimethylpentane | 2 | 1998 | 2013-05-28 |
| 2,3-Dimethylpentane | 3 | 1998 | 2009-07-02 |
| Ethyl alcohol | 1 | ||
| Ethyl alcohol | 2 | ||
| n-Propyl alcohol | 1 | ||
| n-Propyl alcohol | 2 | ||
| n-Butyl alcohol | 1 | ||
| n-Butyl alcohol | 2 | ||
| n-Amyl alcohol | 1 | ||
| n-Amyl alcohol | 2 | ||
| 2-Propanol | 1 | ||
| 2-Propanol | 2 | ||
| 2-Chloropentane | 1 | 1998 | 1998-10-26 |
| 2-Chloropentane | 2 | 1998 | 2013-05-28 |
| 2-Chloropentane | 3 | 1998 | 2009-07-02 |
| 1-Hexanol | 1 | ||
| 1-Hexanol | 2 | ||
| Methyl tert-butyl ether | 1 | 1998 | 1998-10-26 |
| Methyl tert-butyl ether | 2 | 1998 | 2008-08-16 |
| Methyl tert-butyl ether | 3 | 1998 | 2008-08-09 |
| n-Propyl acetate | 1 | ||
| n-Propyl acetate | 2 | 2004 | 2008-08-16 |
| n-Propyl acetate | 3 | 2004 | 2008-08-09 |
| Propionaldehyde | 1 | ||
| Propionaldehyde | 2 | ||
| Acrolein - Unverified | 1 | ||
| Acrolein - Unverified | 2 | ||
| Butyraldehyde | 1 | ||
| Butyraldehyde | 2 | 2004 | 2005-01-28 |
| Butyraldehyde | 3 | 2004 | 2004-10-28 |
| Isobutyraldehyde | 2 | 2004 | 2008-08-16 |
| Isobutyraldehyde | 3 | 2004 | 2008-08-09 |
| Isovaleraldehyde | 1 | ||
| Isovaleraldehyde | 2 | ||
| Butyl acetate | 1 | ||
| Butyl acetate | 2 | 2004 | 2008-08-16 |
| Butyl acetate | 3 | 2004 | 2008-08-09 |
| Trans-Crotonaldehyde | 1 | ||
| Trans-Crotonaldehyde | 2 | ||
| Hexanaldehyde | 1 | ||
| Hexanaldehyde | 2 | ||
| Valeraldehyde | 1 | ||
| Valeraldehyde | 2 | ||
| Methyl ethyl ketone | 1 | ||
| Methyl ethyl ketone | 2 | 2004 | 2008-08-16 |
| Methyl ethyl ketone | 3 | 2004 | 2008-08-09 |
| 3-Pentanone | 2 | ||
| 3-Pentanone | 3 | ||
| 3-Hexanone | 2 | 2004 | 2008-08-16 |
| 3-Hexanone | 3 | 2004 | 2008-08-09 |
| Methyl Butyl Ketone | 2 | 2004 | 2008-08-16 |
| Methyl Butyl Ketone | 3 | 2004 | 2008-08-09 |
| Methyl isobutyl ketone | 1 | ||
| Methyl isobutyl ketone | 2 | 2004 | 2008-08-16 |
| Methyl isobutyl ketone | 3 | 2004 | 2008-08-09 |
| 3-Heptanone | 2 | ||
| 2-Methyl-3-hexanone | 2 | 2004 | 2008-08-16 |
| 2-Methyl-3-hexanone | 3 | 2004 | 2008-08-09 |
| Chloromethane | 2 | 2004 | 2013-05-28 |
| Chloromethane | 3 | 2004 | 2009-07-02 |
| Dichloromethane | 1 | 1998 | 1998-10-26 |
| Dichloromethane | 2 | 1998 | 2013-05-28 |
| Dichloromethane | 3 | 1998 | 2009-07-02 |
| Chloroform | 1 | 1998 | 1998-10-26 |
| Chloroform | 2 | 1998 | 2013-05-28 |
| Chloroform | 3 | 1998 | 2009-07-02 |
| Carbon tetrachloride | 1 | 1998 | 1998-10-26 |
| Carbon tetrachloride | 2 | 1998 | 2013-05-28 |
| Carbon tetrachloride | 3 | 1998 | 2009-07-02 |
| Trichlorofluoromethane | 1 | 1998 | 1998-10-26 |
| Trichlorofluoromethane | 2 | 1998 | 2013-05-28 |
| Trichlorofluoromethane | 3 | 1998 | 2009-07-02 |
| 1,1-Dichloroethane | 1 | 1998 | 1998-10-26 |
| 1,1-Dichloroethane | 2 | 1998 | 2013-05-28 |
| 1,1-Dichloroethane | 3 | 1998 | 2009-07-02 |
| Methyl chloroform | 1 | 1998 | 1998-10-26 |
| Methyl chloroform | 2 | 1998 | 2013-05-28 |
| Methyl chloroform | 3 | 1998 | 2009-07-02 |
| Ethylene dichloride | 1 | 1998 | 1998-10-26 |
| Ethylene dichloride | 2 | 1998 | 2013-05-28 |
| Ethylene dichloride | 3 | 1998 | 2009-07-02 |
| Tetrachloroethylene | 1 | 1998 | 1998-10-26 |
| Tetrachloroethylene | 2 | 1998 | 2013-05-28 |
| Tetrachloroethylene | 3 | 1998 | 2009-07-02 |
| 1,1,2,2-Tetrachloroethane | 2 | 2000 | 2013-05-28 |
| 1,1,2,2-Tetrachloroethane | 3 | 2000 | 2009-07-02 |
| Bromomethane | 1 | 1998 | 1998-10-26 |
| Bromomethane | 2 | 1998 | 2013-05-28 |
| Bromomethane | 3 | 1998 | 2009-07-02 |
| 1,1,2-Trichloroethane | 1 | 1998 | 1998-10-26 |
| 1,1,2-Trichloroethane | 2 | 1998 | 2013-05-28 |
| 1,1,2-Trichloroethane | 3 | 1998 | 2009-07-02 |
| Dichlorodifluoromethane | 2 | 2004 | 2013-05-28 |
| Dichlorodifluoromethane | 3 | 2004 | 2009-07-02 |
| Trichloroethylene | 1 | 1998 | 1998-10-26 |
| Trichloroethylene | 2 | 1998 | 2013-05-28 |
| Trichloroethylene | 3 | 1998 | 2009-07-02 |
| 1,1-Dichloroethylene | 1 | 1998 | 1998-10-26 |
| 1,1-Dichloroethylene | 2 | 1998 | 2013-05-28 |
| 1,1-Dichloroethylene | 3 | 1998 | 2009-07-02 |
| 1,2-Dichloropropane | 1 | 1998 | 1998-10-26 |
| 1,2-Dichloropropane | 2 | 1998 | 2013-05-28 |
| 1,2-Dichloropropane | 3 | 1998 | 2009-07-02 |
| trans-1,3-Dichloropropene | 2 | 2000 | 2013-05-28 |
| trans-1,3-Dichloropropene | 3 | 2000 | 2009-07-02 |
| cis-1,3-Dichloropropene | 2 | 2000 | 2013-05-28 |
| cis-1,3-Dichloropropene | 3 | 2000 | 2009-07-02 |
| Chloroprene | 2 | 1999 | 2005-12-24 |
| Chloroprene | 3 | 1999 | 2005-08-25 |
| Ethylene dibromide | 2 | 2000 | 2013-05-28 |
| Ethylene dibromide | 3 | 2000 | 2009-07-02 |
| Vinyl chloride | 1 | 1998 | 1998-10-26 |
| Vinyl chloride | 2 | 1998 | 2013-05-28 |
| Vinyl chloride | 3 | 1998 | 2009-07-02 |
| Heptanal | 1 | ||
| Heptanal | 2 | ||
| n-Undecane | 1 | 1998 | 1998-10-26 |
| n-Undecane | 2 | 1998 | 2013-05-28 |
| n-Undecane | 3 | 1998 | 2009-07-02 |
| 2-Methylheptane | 1 | 1998 | 1998-10-26 |
| 2-Methylheptane | 2 | 1998 | 2013-05-28 |
| 2-Methylheptane | 3 | 1998 | 2009-07-02 |
| Ozone | 1 | ||
| Ozone | 2 | 1981 | 2025-08-31 |
| m/p Xylene | 1 | 1998 | 1998-10-26 |
| m/p Xylene | 2 | 1998 | 2013-05-28 |
| m/p Xylene | 3 | 1998 | 2009-07-02 |
| Benzene | 1 | 1998 | 1998-10-26 |
| Benzene | 2 | 1998 | 2013-05-28 |
| Benzene | 3 | 1998 | 2009-07-02 |
| Toluene | 1 | 1998 | 1998-10-26 |
| Toluene | 2 | 1998 | 2013-05-28 |
| Toluene | 3 | 1998 | 2009-07-02 |
| Ethylbenzene | 1 | 1998 | 1998-10-26 |
| Ethylbenzene | 2 | 1998 | 2013-05-28 |
| Ethylbenzene | 3 | 1998 | 2009-07-02 |
| o-Xylene | 1 | 1998 | 1998-10-26 |
| o-Xylene | 2 | 1998 | 2013-05-28 |
| o-Xylene | 3 | 1998 | 2009-07-02 |
| 1,3,5-Trimethylbenzene | 1 | 1998 | 1998-10-26 |
| 1,3,5-Trimethylbenzene | 2 | 1998 | 2013-05-28 |
| 1,3,5-Trimethylbenzene | 3 | 1998 | 2009-07-02 |
| 1,2,4-Trimethylbenzene | 1 | 1998 | 1998-10-26 |
| 1,2,4-Trimethylbenzene | 2 | 1998 | 2013-05-28 |
| 1,2,4-Trimethylbenzene | 3 | 1998 | 2009-07-02 |
| n-Propylbenzene | 1 | 1998 | 1998-10-26 |
| n-Propylbenzene | 2 | 1998 | 2013-05-28 |
| n-Propylbenzene | 3 | 1998 | 2009-07-02 |
| Isopropylbenzene | 1 | 1998 | 1998-10-26 |
| Isopropylbenzene | 2 | 1998 | 2013-05-28 |
| Isopropylbenzene | 3 | 1998 | 2009-07-02 |
| o-Ethyltoluene | 1 | 1998 | 1998-10-26 |
| o-Ethyltoluene | 2 | 1998 | 2013-05-28 |
| o-Ethyltoluene | 3 | 1998 | 2009-07-02 |
| m-Ethyltoluene | 1 | 1998 | 1998-10-26 |
| m-Ethyltoluene | 2 | 1998 | 2013-05-28 |
| m-Ethyltoluene | 3 | 1998 | 2009-07-02 |
| p-Ethyltoluene | 1 | 1998 | 1998-10-26 |
| p-Ethyltoluene | 2 | 1998 | 2013-05-28 |
| p-Ethyltoluene | 3 | 1998 | 2009-07-02 |
| m-Diethylbenzene | 1 | 1998 | 1998-10-26 |
| m-Diethylbenzene | 2 | 1998 | 2013-05-28 |
| m-Diethylbenzene | 3 | 1998 | 2009-07-02 |
| p-Diethylbenzene | 1 | 1998 | 1998-10-26 |
| p-Diethylbenzene | 2 | 1998 | 2013-05-28 |
| p-Diethylbenzene | 3 | 1998 | 2009-07-02 |
| Styrene | 1 | 1998 | 1998-10-26 |
| Styrene | 2 | 1998 | 2013-05-28 |
| Styrene | 3 | 1998 | 2009-07-02 |
| 1,2,3-Trimethylbenzene | 1 | 1998 | 1998-10-26 |
| 1,2,3-Trimethylbenzene | 2 | 1998 | 2013-05-28 |
| 1,2,3-Trimethylbenzene | 3 | 1998 | 2009-07-02 |
| Benzaldehyde | 1 | ||
| Benzaldehyde | 2 | ||
| Chlorobenzene | 1 | 1998 | 1998-10-26 |
| Chlorobenzene | 2 | 1998 | 2013-05-28 |
| Chlorobenzene | 3 | 1998 | 2009-07-02 |
| Wind Speed - Scalar | 1 | 1998 | 2025-08-31 |
| Wind Direction - Scalar | 1 | 2022 | 2025-08-31 |
| Wind Speed - Resultant | 1 | 1981 | 2025-08-31 |
| Wind Direction - Resultant | 1 | 1981 | 2025-08-31 |
| Peak Wind Gust | 1 | 1997 | 2025-08-31 |
| Std Dev Hz Wind Direction | 1 | 1998 | 2025-08-31 |
| Outdoor Temperature | 1 | 1981 | 2025-08-31 |
| Dew Point | 1 | 2002 | 2025-08-31 |
| Relative Humidity | 1 | 2002 | 2025-08-31 |
| Solar radiation | 1 | 1998 | 2025-08-31 |
| PM10 Total 0-10um STP | 1 | 1997 | 2003-02-26 |
| PM10 - LC | 1 | 1998 | 1999-12-26 |