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In order to serve you better, please select your Dominion Energy location services.
In order to serve you better, please select your Dominion Energy location services.
Gas Quality Data and More
Dominion Energy provides industrial customers in Idaho with data on gas quality, meter capacity information, degree day information, and environmental comparisons.
Much of the sulfur contained in the gas consists of compounds that naturally occur in the gas. Common sulfur compounds that may be found in the gas supply are Tetrahydrothiophene (THT), Tertiary Butyl Mercaptan (TBM), Dimethyl Sulfide (DMS), and Hydrogen Sulfide (H2S).
These compounds are harmless at low levels but can cause customer complaints due to excessive gas odor, or in the case of Hydrogen Sulfide, become dangerous at very high levels.
We continuously monitor the gas stream for specific sulfur compounds at several points on its system as part of its program to ensure that the gas is properly odorized and that sulfur levels are within established limits.
Comparison of typical fossil-fuel-emissions levels
(pounds per billion Btu of energy input)
| Emission Component | Natural Gas | Oil | Coal |
| Carbon Dioxide | 117,000 |
164,000 |
208,000 |
| Carbon Monoxide | 40 | 33 | 208 |
| Nitrogen Oxide | 92 | 448 | 457 |
| Sulfur Dioxide |
1 | 1,122 | 2,591 |
| Particulates |
7 | 84 | 2,744 |
| Mercury |
0.000 | 0.007 | 0.016 |
Typical emissions levels for natural gas-fired generating plants
(pounds per megawatt-hour)
| Plant Configuration |
Carbon Dioxide |
Carbon Monoxide |
Nitrogen Oxides |
Sulfur Oxides |
Particulate Matter |
Mercury |
| Combined-cycle |
760 | 0.26 | 0.60 | 0.01 | 0.05 | 0.00000 |
| Simple-cycle |
1,140 | 0.39 | 0.90 | 0.01 | 0.07 | 0.00000 |
Typical emissions levels for coal and fuel-oil-fired generating plants
(pounds per megawatt-hour)
| Plant Configuration | Carbon Dioxide | Carbon Monoxide | Nitrogen Oxides | Sulfur Oxides | Particulate Matte | Mercury |
| Coal-fired/ steam |
2,028 | 2.03 | 4.45 | 25.26 | 26.75 | 0.00016 |
| Oil-fired/ steam |
1,600 | 0.32 | 4.37 | 10.93 | 0.82 | 0.00007 |
Comparison of emissions for auto engines
(pounds per million Btu)
| Fuel Type | Carbon Dioxide | Carbon Monoxide | Nitrogen Oxides | Total Hydrocarbons | Particulate Matter |
| Natural Gas | 119.6 | 0.409 | 0.082 | 0.193 | |
| Gasoline | 160.7 | 1.125 | 0.095 | 0.061 |
Comparison of emissions for heavy-duty truck engines
(pounds per million Btu)
| Fuel Type | Carbon Dioxide | Carbon Monoxide | Nitrogen Oxides | Total Hydrocarbons | Particulate Matter |
| Natural Gas | 125.6 | 0.004 | 0.844 | 0.893 | 0.001 |
| Diesel | 166.7 | 0.078 | 1.443 | 0.045 | 0.025 |
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