Carbon Monoxide (CO)
Carbon monoxide (CO) is a tasteless, odorless, and colorless gas. It is a public health concern because elevated concentrations affect human and animal health by reducing the supply of oxygen to body tissues. The primary anthropogenic sources of CO in the Tahoe Region are on-road motor vehicles, residential wood burning, motorized watercraft, and off-highway vehicles. Wildfires are a natural source of CO. Policy and management actions implemented through the Regional Plan to control CO emissions focus on reducing private automobile use through improvements to public transportation and bike/pedestrian trail infrastructure. Vehicle emission standards enacted by state and federal governments also reduce CO emissions in the Region, mainly by requiring improvements in engine and exhaust technologies. The conversion to electric vehicles and the use of non-carbon-based fuels is also expected to have a growing effect on the reduction of carbon monoxide.
Indicators
| THRESHOLD CATEGORY REPORTING CATEGORY INDICATOR |
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| THRESHOLD CATEGORY REPORTING CATEGORY INDICATOR |
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The threshold evaluation assigns a status to an indicator relative to the adopted standard. As shown on the icon legend below, the background color of the reporting icon communicates the indicator “status” or estimate of current condition. For numerical standards, the status of an indicator is classified into “better” or “worse” categories based on the percent divergence of the current indicator value from the standard or interim target. For most indicators, the current value is taken directly from the value recorded in the most recent year. In some cases, the average value calculated from all data collected during the evaluation period is used. When an average value is used, it is noted and explained on the indicator evaluation page for that specific evaluation year.
Note: Thresholds reported as "Implemented" refer to thresholds that were adopted as policy guidance in the development of the Regional Plan. In these cases, the subject policies, ordinances, or environmental protections have been incorporated into the TRPA Regional Plan and TRPA Code of Ordinances.