Threshold Dashboard
The threshold standards establish the shared goals for restoration and environmental quality in the Region. The goals range from specific targets for air and water quality, to broad visions for maintaining scenic beauty and enhancing the recreational experience. The Regional Plan, with all of its elements, as implemented through TRPA ordinances and rules and regulations, will achieve and maintain the adopted threshold standards while providing opportunities for orderly growth and development. Thresholds ensure that the “Tahoe experience” would not be lost for future generations.
Every four years, TRPA leads the development of a threshold evaluation report that assesses the environmental health of the Region relative to the adopted standards. We are proud to present the 2019 Threshold Evaluation to residents, visitors, and others concerned with the environmental health of the Tahoe Region. This is the seventh comprehensive report since the adoption of the 1987 Regional Plan. The evaluation is a collaborative endeavor that draws on the monitoring work and analytic expertise of federal, state, and local agencies, academic institutions, and private businesses. We look forward to working with all stakeholders to continue to protect and restore this spectacular place for generations to come.
Threshold Categories and Indicators
View the hierarchy of Threshold Indicators by Category below. The icons on the right summarize the status, trend, and confidence for each indicator based on evaluations conducted every four years. A legend for these icons is available at the bottom, or you can hover over the symbols for more information. For a simpler view, start by exploring the Threshold Categories.
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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.