COOK COUNTY TRAILER
Site ID: 17-031-1601 · 41.6681°N, 87.9906°W
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Monitors
| Parameter | POC | First Year | Last Sample |
|---|---|---|---|
| Sulfur dioxide | 1 | 1982 | 2025-09-30 |
| SO2 max 5-min avg | 1 | 2010 | 2025-09-30 |
| Nitric oxide (NO) | 1 | 1984 | 1991-12-31 |
| Nitrogen dioxide (NO2) | 1 | 1982 | 1991-12-31 |
| Oxides of nitrogen (NOx) | 1 | 1984 | 1991-12-31 |
| Propylene | 1 | 1993 | 1994-05-26 |
| Propylene | 7 | 1991 | 1992-04-18 |
| Propylene | 9 | 1991 | 1992-02-06 |
| Acetylene | 7 | 1991 | 1992-04-18 |
| Acetylene | 9 | 1991 | 1992-02-06 |
| Freon 113 | 1 | 1993 | 1994-05-26 |
| Freon 114 | 1 | 1993 | 1994-05-26 |
| 1,3-Butadiene | 1 | 1993 | 1994-05-26 |
| 1,3-Butadiene | 7 | 1991 | 1992-04-18 |
| 1,3-Butadiene | 9 | 1991 | 1992-02-06 |
| n-Pentane | 1 | 1993 | 1994-05-26 |
| n-Hexane | 1 | 1993 | 1994-05-26 |
| n-Heptane | 1 | 1993 | 1994-05-26 |
| n-Octane | 1 | 1993 | 1994-05-26 |
| n-Octane | 7 | 1991 | 1992-04-18 |
| n-Octane | 9 | 1991 | 1992-02-06 |
| 3-Chloropropene | 1 | 1993 | 1994-05-26 |
| Chlorodifluoromethane | 1 | 1993 | 1994-05-26 |
| Formaldehyde | 1 | 1993 | 1994-05-26 |
| Acetaldehyde | 1 | 1993 | 1994-05-26 |
| Propionaldehyde | 1 | 1993 | 1994-05-26 |
| Acrolein - Unverified | 1 | 1993 | 1994-03-27 |
| Butyraldehyde | 1 | 1993 | 1994-05-26 |
| Isovaleraldehyde | 1 | 1993 | 1994-05-26 |
| Trans-Crotonaldehyde | 1 | 1993 | 1994-05-26 |
| Hexanaldehyde | 1 | 1993 | 1994-05-26 |
| Valeraldehyde | 1 | 1993 | 1994-05-26 |
| Acetone | 1 | 1993 | 1994-05-26 |
| Chloromethane | 1 | 1993 | 1994-05-26 |
| Chloromethane | 7 | 1991 | 1992-04-18 |
| Chloromethane | 9 | 1991 | 1992-02-06 |
| Dichloromethane | 1 | 1993 | 1994-05-26 |
| Dichloromethane | 7 | 1991 | 1992-04-18 |
| Dichloromethane | 9 | 1991 | 1992-02-06 |
| Chloroform | 1 | 1993 | 1994-05-26 |
| Chloroform | 7 | 1991 | 1992-04-18 |
| Chloroform | 9 | 1991 | 1992-02-06 |
| Carbon tetrachloride | 1 | 1993 | 1994-05-26 |
| Carbon tetrachloride | 7 | 1991 | 1992-04-18 |
| Carbon tetrachloride | 9 | 1991 | 1992-02-06 |
| Dibromomethane | 1 | 1994 | 1994-05-26 |
| Bromoform | 1 | 1993 | 1994-05-26 |
| Bromoform | 7 | ||
| Bromoform | 9 | ||
| Trichlorofluoromethane | 1 | 1993 | 1994-05-26 |
| Chloroethane | 1 | 1993 | 1994-05-26 |
| Chloroethane | 7 | 1991 | 1992-04-18 |
| Chloroethane | 9 | 1991 | 1992-02-06 |
| 1,1-Dichloroethane | 1 | 1993 | 1994-05-26 |
| 1,1-Dichloroethane | 7 | 1991 | 1992-04-18 |
| 1,1-Dichloroethane | 9 | 1991 | 1992-02-06 |
| Methyl chloroform | 1 | 1993 | 1994-05-26 |
| Methyl chloroform | 7 | 1991 | 1992-04-18 |
| Methyl chloroform | 9 | 1991 | 1992-02-06 |
| Ethylene dichloride | 1 | 1993 | 1994-05-26 |
| Ethylene dichloride | 7 | 1991 | 1992-04-18 |
| Ethylene dichloride | 9 | 1991 | 1992-02-06 |
| Tetrachloroethylene | 1 | 1993 | 1994-05-26 |
| Tetrachloroethylene | 7 | 1991 | 1992-04-18 |
| Tetrachloroethylene | 9 | 1991 | 1992-02-06 |
| 1,1,2,2-Tetrachloroethane | 1 | 1993 | 1994-05-26 |
| 1,1,2,2-Tetrachloroethane | 7 | ||
| 1,1,2,2-Tetrachloroethane | 9 | ||
| Bromomethane | 1 | 1993 | 1994-05-26 |
| Bromomethane | 7 | 1991 | 1992-04-18 |
| Bromomethane | 9 | 1991 | 1992-02-06 |
| 1,1,2-Trichloroethane | 1 | 1993 | 1994-05-26 |
| 1,1,2-Trichloroethane | 7 | 1991 | 1992-04-18 |
| 1,1,2-Trichloroethane | 9 | 1991 | 1992-02-06 |
| Dichlorodifluoromethane | 1 | 1993 | 1994-05-26 |
| Trichloroethylene | 1 | 1993 | 1994-05-26 |
| Trichloroethylene | 7 | 1991 | 1992-04-18 |
| Trichloroethylene | 9 | 1991 | 1992-02-06 |
| 1,1-Dichloroethylene | 1 | 1993 | 1994-05-26 |
| Bromodichloromethane | 1 | 1993 | 1994-05-26 |
| Bromodichloromethane | 7 | 1991 | 1992-04-18 |
| Bromodichloromethane | 9 | 1991 | 1992-02-06 |
| 1,2-Dichloropropane | 1 | 1993 | 1994-05-26 |
| 1,2-Dichloropropane | 7 | 1991 | 1992-04-18 |
| 1,2-Dichloropropane | 9 | 1991 | 1992-02-06 |
| trans-1,3-Dichloropropene | 7 | 1991 | 1992-04-18 |
| trans-1,3-Dichloropropene | 9 | 1991 | 1992-02-06 |
| cis-1,3-Dichloropropene | 7 | 1991 | 1992-04-18 |
| cis-1,3-Dichloropropene | 9 | 1991 | 1992-02-06 |
| Dibromochloromethane | 1 | 1993 | 1994-05-26 |
| Dibromochloromethane | 7 | 1991 | 1992-04-18 |
| Dibromochloromethane | 9 | 1991 | 1992-02-06 |
| Chloroprene | 1 | 1993 | 1994-05-26 |
| Chloroprene | 7 | 1991 | 1992-04-18 |
| Chloroprene | 9 | 1991 | 1992-02-06 |
| Bromochloromethane | 7 | 1991 | 1992-04-18 |
| Bromochloromethane | 9 | 1991 | 1992-02-06 |
| trans-1,2-Dichloroethylene | 7 | 1991 | 1992-04-18 |
| trans-1,2-Dichloroethylene | 9 | 1991 | 1992-02-06 |
| 1,2-Dichloroethene(total) | 1 | 1993 | 1994-05-26 |
| 1,3-Dichloropropene(total) | 1 | 1993 | 1994-05-26 |
| Ethylene dibromide | 1 | 1993 | 1994-05-26 |
| Hexachlorobutadiene | 1 | 1993 | 1994-05-26 |
| Vinyl chloride | 1 | 1993 | 1994-05-26 |
| Vinyl chloride | 7 | 1991 | 1992-04-18 |
| Vinyl chloride | 9 | 1991 | 1992-02-06 |
| Ozone | 1 | 1983 | 2025-09-30 |
| m/p Xylene | 1 | 1993 | 1994-05-26 |
| m/p Xylene | 7 | 1991 | 1992-04-18 |
| m/p Xylene | 9 | 1991 | 1992-02-06 |
| Styrene and o-xylene | 7 | ||
| Styrene and o-xylene | 9 | ||
| o-Xylene & 1,1,2,2-tetrachloroethane | 7 | 1991 | 1992-04-18 |
| o-Xylene & 1,1,2,2-tetrachloroethane | 9 | 1991 | 1992-02-06 |
| Benzene | 1 | 1993 | 1994-05-26 |
| Benzene | 7 | 1991 | 1992-04-18 |
| Benzene | 9 | 1991 | 1992-02-06 |
| Toluene | 1 | 1993 | 1994-05-26 |
| Toluene | 7 | 1991 | 1992-04-18 |
| Toluene | 9 | 1991 | 1992-02-06 |
| Ethylbenzene | 1 | 1993 | 1994-05-26 |
| Ethylbenzene | 7 | 1991 | 1992-04-18 |
| Ethylbenzene | 9 | 1991 | 1992-02-06 |
| o-Xylene | 1 | 1993 | 1994-05-26 |
| 1,3,5-Trimethylbenzene | 1 | 1993 | 1994-05-26 |
| 1,2,4-Trimethylbenzene | 1 | 1993 | 1994-05-26 |
| Styrene | 1 | 1993 | 1994-05-26 |
| Styrene | 7 | 1991 | 1992-04-18 |
| Styrene | 9 | 1991 | 1992-02-06 |
| Benzene,(1-methylethenyl)- | 1 | 1993 | 1994-05-26 |
| Benzaldehyde | 1 | 1993 | 1994-05-26 |
| 2,5-Dimethylbenzaldehyde | 1 | 1993 | 1994-05-26 |
| Tolualdehydes | 1 | 1993 | 1994-05-26 |
| Chlorobenzene | 1 | 1993 | 1994-05-26 |
| Chlorobenzene | 7 | 1991 | 1992-04-18 |
| Chlorobenzene | 9 | 1991 | 1992-02-06 |
| 1,2-Dichlorobenzene | 1 | 1993 | 1994-05-26 |
| 1,2-Dichlorobenzene | 7 | 1991 | 1992-04-18 |
| 1,2-Dichlorobenzene | 9 | 1991 | 1992-02-06 |
| 1,3-Dichlorobenzene | 1 | 1993 | 1994-05-26 |
| 1,3-Dichlorobenzene | 7 | 1991 | 1992-04-18 |
| 1,3-Dichlorobenzene | 9 | 1991 | 1992-02-06 |
| 1,4-Dichlorobenzene | 1 | 1993 | 1994-05-26 |
| 1,4-Dichlorobenzene | 7 | 1991 | 1992-04-18 |
| 1,4-Dichlorobenzene | 9 | 1991 | 1992-02-06 |
| Benzyl chloride | 1 | 1993 | 1994-05-26 |
| 1,2,4-Trichlorobenzene | 1 | 1993 | 1994-05-26 |