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Environmental Thresold Categories
In 1982, TRPA adopted nine environmental threshold carrying capacities (thresholds), which set environmental standards for the Lake Tahoe Basin and indirectly define the capacity of the Region to accommodate additional land development. The nine thresholds are water quality, soil conservation, air quality, vegetation, wildlife, fisheries, scenic resources, noise, and recreation. Many of the environmental thresholds will take generations to achieve and a sustained commitment to conservation is imperative.
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Water Quality
Reduce nutrient and sediment loads from surface runoff, groundwater, and atmosphere to meet 1960s level of water clarity and algal productivity. Learn more about Water Quality.
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Soil Conservation
Preserve natural stream environment zones (SEZ), restore 25% of disturbed SEZ (1,100 acres), reduce total land coverage in the Region. Learn more about Soil Conservation.
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