Observation Sites
Yellow markers indicate discontinued sites
Thurmont, Maryland, United States [TMD]
Location
- Country: United States
- Latitude: 39.5768° North
- Longitude: 77.4881° West
- Elevation: 561.00 masl
- Time Zone: Local Standard Time + 5.0 hour(s) = UTC
Data
Cooperating Agencies
- NIST and Earth Networks
Earth Networks Tower: GHG61
GML Projects at Thurmont, Maryland
| Parameter | Formula | First Sample Date | Status |
|---|---|---|---|
| Carbon Dioxide | CO2 | 2017-08-01 | Ongoing |
| Methane | CH4 | 2017-08-01 | Ongoing |
| Carbon Monoxide | CO | 2017-08-01 | Ongoing |
| Molecular Hydrogen | H2 | 2017-08-01 | Ongoing |
| Nitrous Oxide | N2O | 2017-08-01 | Ongoing |
| Sulfur Hexafluoride | SF6 | 2017-08-01 | Ongoing |
| Sulfur Hexafluoride | SF6 | 2017-08-01 | Ongoing |
| Carbon-14/Carbon in Carbon Dioxide | D14C (CO2) | 2017-08-01 | Ongoing |
| HFC-134a | CH2FCF3 | 2017-08-01 | Ongoing |
| HCFC-22 | CHF2Cl | 2017-08-01 | Ongoing |
| CFC-12 | CCl2F2 | 2017-08-01 | Ongoing |
| Methyl Chloride | CH3Cl | 2017-08-01 | Ongoing |
| CFC-114 | CFC-114 | 2017-08-01 | Ongoing |
| HCFC-142b | CH3CF2Cl | 2017-08-01 | Ongoing |
| Halon-1211 | CBrClF2 | 2017-08-01 | Ongoing |
| Methyl Bromide | CH3Br | 2017-08-01 | Ongoing |
| CFC-11 | CCl3F (ion 103) | 2017-08-01 | Ongoing |
| HCFC-141b | CH3CCl2F | 2017-08-01 | Ongoing |
| Methyl Iodide | CH3I | 2017-08-01 | Ongoing |
| CFC-113 | CCl2FCClF2 | 2017-08-01 | Ongoing |
| Dichloromethane | CH2Cl2 | 2017-08-01 | Ongoing |
| Chloroform | CHCl3 | 2017-08-01 | Ongoing |
| Methyl Chloroform (97) | CH3CCl3 | 2017-08-01 | Ongoing |
| Carbon Tetrachloride | CCl4 | 2017-08-01 | Ongoing |
| Methylene Bromide | CH2Br2 | 2017-08-01 | Ongoing |
| Perchloroethylene (PCE) | C2Cl4 | 2017-08-01 | Ongoing |
| Bromoform | CHBr3 | 2017-08-01 | Ongoing |
| Benzene | C6H6 | 2017-08-01 | Ongoing |
| Carbonyl Sulfide | COS | 2017-08-01 | Ongoing |
| HCFC-21 | CHCl2F | 2017-08-01 | Ongoing |
| HFC-152a | CH3CHF2 | 2017-08-01 | Ongoing |
| HCFC-124 | CHClFCF3 | 2017-08-01 | Ongoing |
| Carbon Disulfide | CS2 | 2017-08-01 | Ongoing |
| Ethane | C2H6 | 2017-08-01 | Ongoing |
| Ethylene | C2H4 | 2017-08-01 | Ongoing |
| Propane | C3H8 | 2017-08-01 | Ongoing |
| Propylene | C3H6 | 2017-08-01 | Ongoing |
| Isobutane | i-C4H10 | 2017-08-01 | Ongoing |
| n-Butane | n-C4H10 | 2017-08-01 | Ongoing |
| isopentane | i-C5H12 | 2017-08-01 | Ongoing |
| n-Pentane | n-C5H12 | 2017-08-01 | Ongoing |
| n-Hexane | n-C6H14 | 2017-08-01 | Ongoing |
| Halon-1301 | CF3Br | 2017-08-01 | Ongoing |
| Halon-2402 | CBrF2CBrF2 | 2017-08-01 | Ongoing |
| HFC-143a | CH3CF3 | 2017-08-01 | Ongoing |
| HFC-227ea | CF3CHFCF3 | 2017-08-01 | Ongoing |
| HFC-365mfc | CH3CF2CH2CF3 | 2017-08-01 | Ongoing |
| CFC-115 | CClF2CF3 | 2017-08-01 | Ongoing |
| HFC-125 | CHF2CF3 | 2017-08-01 | Ongoing |
| CFC-13 | CClF3 | 2017-08-01 | Ongoing |
| HFC-23 | CHF3 | 2017-08-01 | Ongoing |
| PFC-218 | C3F8 | 2017-08-01 | Ongoing |
| Acetylene | C2H2 | 2017-08-01 | Ongoing |
| HFC-32 | CH2F2 | 2017-08-01 | Ongoing |
| HFC-134 | CHF2CHF2 | 2017-08-01 | Ongoing |
| Halon-1011 | CH2BrCl | 2017-08-01 | Ongoing |
| PFC-14 | CF4 | 2017-08-01 | Ongoing |
| PFC-116 | CF3CF3 | 2017-08-01 | Ongoing |
| Trifluoroamine | NF3 | 2017-08-01 | Ongoing |
| Sulfuryl Fluoride | SO2F2 | 2017-08-01 | Ongoing |
| HFC-236fa | CF3CH2CF3 | 2017-08-01 | Ongoing |
| HCFC-133a | CH2ClCF3 | 2017-08-01 | Ongoing |
| CFC-112 | CCl3CClF2 | 2017-08-01 | Ongoing |
| Trichloroethylene (TCE) | C2HCl3 | 2017-08-01 | Ongoing |
| HFO-1234yf | CH2=CFCF3 | 2017-08-01 | Ongoing |
| HFO-1234zeE | CHF=CHCF3 | 2017-08-01 | Ongoing |
| ethylene dichloride (1,2 DCE) | CH2ClCH2Cl | 2017-12-24 | Ongoing |
| HCFC-123 | CHCl2CF3 | 2017-12-24 | Ongoing |
| Morpholine | C5F11NO | 2017-11-09 | Ongoing |
| Perfluorotriethylamine (PFTEA) | (C2F5)3N | 2017-11-09 | Ongoing |
| Perfluorotripropylamine (PFTPA) | (C3F7)3N | 2017-11-09 | Ongoing |
| HFC-245fa | 2022-06-05 | Ongoing |
| Parameter | Formula | First Sample Date | Status |
|---|---|---|---|
| Carbon Dioxide | CO2 | 2017-08-01 | Ongoing |
| Methane | CH4 | 2017-08-01 | Ongoing |
| Carbon Monoxide | CO | 2017-08-01 | Ongoing |
| Molecular Hydrogen | H2 | 2017-08-01 | Ongoing |
| Nitrous Oxide | N2O | 2017-08-01 | Ongoing |
| Sulfur Hexafluoride | SF6 | 2017-08-01 | Ongoing |
| Sulfur Hexafluoride | SF6 | 2017-08-01 | Ongoing |
| Carbon-14/Carbon in Carbon Dioxide | D14C (CO2) | 2017-08-01 | Ongoing |
| HFC-134a | CH2FCF3 | 2017-08-01 | Ongoing |
| HCFC-22 | CHF2Cl | 2017-08-01 | Ongoing |
| CFC-12 | CCl2F2 | 2017-08-01 | Ongoing |
| Methyl Chloride | CH3Cl | 2017-08-01 | Ongoing |
| CFC-114 | CFC-114 | 2017-08-01 | Ongoing |
| HCFC-142b | CH3CF2Cl | 2017-08-01 | Ongoing |
| Halon-1211 | CBrClF2 | 2017-08-01 | Ongoing |
| Methyl Bromide | CH3Br | 2017-08-01 | Ongoing |
| CFC-11 | CCl3F (ion 103) | 2017-08-01 | Ongoing |
| HCFC-141b | CH3CCl2F | 2017-08-01 | Ongoing |
| Methyl Iodide | CH3I | 2017-08-01 | Ongoing |
| CFC-113 | CCl2FCClF2 | 2017-08-01 | Ongoing |
| Dichloromethane | CH2Cl2 | 2017-08-01 | Ongoing |
| Chloroform | CHCl3 | 2017-08-01 | Ongoing |
| Methyl Chloroform (97) | CH3CCl3 | 2017-08-01 | Ongoing |
| Carbon Tetrachloride | CCl4 | 2017-08-01 | Ongoing |
| Methylene Bromide | CH2Br2 | 2017-08-01 | Ongoing |
| Perchloroethylene (PCE) | C2Cl4 | 2017-08-01 | Ongoing |
| Bromoform | CHBr3 | 2017-08-01 | Ongoing |
| Benzene | C6H6 | 2017-08-01 | Ongoing |
| Carbonyl Sulfide | COS | 2017-08-01 | Ongoing |
| HCFC-21 | CHCl2F | 2017-08-01 | Ongoing |
| HFC-152a | CH3CHF2 | 2017-08-01 | Ongoing |
| HCFC-124 | CHClFCF3 | 2017-08-01 | Ongoing |
| Carbon Disulfide | CS2 | 2017-08-01 | Ongoing |
| Ethane | C2H6 | 2017-08-01 | Ongoing |
| Ethylene | C2H4 | 2017-08-01 | Ongoing |
| Propane | C3H8 | 2017-08-01 | Ongoing |
| Propylene | C3H6 | 2017-08-01 | Ongoing |
| Isobutane | i-C4H10 | 2017-08-01 | Ongoing |
| n-Butane | n-C4H10 | 2017-08-01 | Ongoing |
| isopentane | i-C5H12 | 2017-08-01 | Ongoing |
| n-Pentane | n-C5H12 | 2017-08-01 | Ongoing |
| n-Hexane | n-C6H14 | 2017-08-01 | Ongoing |
| Halon-1301 | CF3Br | 2017-08-01 | Ongoing |
| Halon-2402 | CBrF2CBrF2 | 2017-08-01 | Ongoing |
| HFC-143a | CH3CF3 | 2017-08-01 | Ongoing |
| HFC-227ea | CF3CHFCF3 | 2017-08-01 | Ongoing |
| HFC-365mfc | CH3CF2CH2CF3 | 2017-08-01 | Ongoing |
| CFC-115 | CClF2CF3 | 2017-08-01 | Ongoing |
| HFC-125 | CHF2CF3 | 2017-08-01 | Ongoing |
| CFC-13 | CClF3 | 2017-08-01 | Ongoing |
| HFC-23 | CHF3 | 2017-08-01 | Ongoing |
| PFC-218 | C3F8 | 2017-08-01 | Ongoing |
| Acetylene | C2H2 | 2017-08-01 | Ongoing |
| HFC-32 | CH2F2 | 2017-08-01 | Ongoing |
| HFC-134 | CHF2CHF2 | 2017-08-01 | Ongoing |
| Halon-1011 | CH2BrCl | 2017-08-01 | Ongoing |
| PFC-14 | CF4 | 2017-08-01 | Ongoing |
| PFC-116 | CF3CF3 | 2017-08-01 | Ongoing |
| Trifluoroamine | NF3 | 2017-08-01 | Ongoing |
| Sulfuryl Fluoride | SO2F2 | 2017-08-01 | Ongoing |
| HFC-236fa | CF3CH2CF3 | 2017-08-01 | Ongoing |
| HCFC-133a | CH2ClCF3 | 2017-08-01 | Ongoing |
| CFC-112 | CCl3CClF2 | 2017-08-01 | Ongoing |
| Trichloroethylene (TCE) | C2HCl3 | 2017-08-01 | Ongoing |
| HFO-1234yf | CH2=CFCF3 | 2017-08-01 | Ongoing |
| HFO-1234zeE | CHF=CHCF3 | 2017-08-01 | Ongoing |
| ethylene dichloride (1,2 DCE) | CH2ClCH2Cl | 2017-12-24 | Ongoing |
| HCFC-123 | CHCl2CF3 | 2017-12-24 | Ongoing |
| Morpholine | C5F11NO | 2017-11-09 | Ongoing |
| Perfluorotriethylamine (PFTEA) | (C2F5)3N | 2017-11-09 | Ongoing |
| Perfluorotripropylamine (PFTPA) | (C3F7)3N | 2017-11-09 | Ongoing |
| HFC-245fa | 2022-06-05 | Ongoing |