Acadia NP - Ozone

This table summarizes conditions and trends for ozone, visibility, nitrogen, and sulfur. Monitoring data and risk assessments are used to identify the air quality condition status in each category as good, or of moderate or significant concern. Trends are calculated from data collected over a ten-year period at on-site or representative nearby monitors where available. more >>
Ground-level ozone can harm both humans and plants. Human health risk from ozone is measured using the 4th-highest daily maximum 8-hour ozone concentration in parts per billion (ppb). Impacts on vegetation are evaluated using the W126 Index metric that relates plant response to ozone exposure. Explore the tabs below to learn about trends, exceedances of the human health standard, and the status of ozone at the park.
Visibility is a measure of how far and how well we can see color and detail in distant views (learn more). Fine particles and gaseous air pollution form haze in the atmosphere that reduces visibility. The Clean Air Act visibility goal requires improvement on the 20% haziest days and no degradation on the 20% clearest days. Look at the tabs below to learn how visibility has changed over time, what is in the air on the clearest and haziest days, and the status of visibility at the park.
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Nitrogen pollution can harm ecosystems by acidifying or enriching soils and surface waters (learn more). Nitrogen deposition trends are evaluated using pollutant concentrations in precipitation (micro equivalents/liter) to account for yearly variations in rain, snow, and fog. Composition and status report pollutant loading to ecosystems (kilograms/hectare/year). Click on the tabs below to visualize how nitrogen deposition has changed over time, what compounds make up deposition, and the status of nitrogen deposition at the park.
Sulfur pollution can harm ecosystems by acidifying soils and surface waters (learn more). Sulfur deposition trends are evaluated using pollutant concentrations in precipitation (micro equivalents/liter) to account for yearly variations in rain, snow, and fog. Composition and status report pollutant loading to ecosystems (kilograms/hectare/year). Click on the tabs below to visualize how sulfur deposition has changed over time, what compounds make up deposition, and the status of sulfur deposition at the park.