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The Nonattainment Area - Lead (Pb-2008) dataset was updated on June 30, 2026 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of...
Search relevance: 1.00 | Views last month: 10 | Catalog Last Checked: August 03, 2026 at 02:52 PM -
This is the metadata associated with Pavlovic et al. (2023) entitled "Empirical nitrogen and sulfur critical loads of U.S. tree species and their uncertainties with machine learning"...
Search relevance: 1.00 | Views last month: 7 | Catalog Last Checked: August 03, 2026 at 12:49 AM -
The Nonattainment Area - 8 hr Ozone (1997) dataset was updated on June 30, 2026 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of...
Search relevance: 1.00 | Views last month: 6 | Catalog Last Checked: August 03, 2026 at 02:52 PM -
The Nonattainment Area - 8 hr ozone (2008) dataset was updated on June 30, 2026 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of...
Search relevance: 1.00 | Views last month: 6 | Catalog Last Checked: August 03, 2026 at 02:52 PM -
A list by county of the current attainment status of the National Ambient Air Quality Standards (NAAQS).
Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: August 01, 2026 at 09:10 AM -
The Nonattainment Area - 8 hr ozone (2015) dataset was updated on June 30, 2026 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of...
Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: August 03, 2026 at 02:52 PM -
The Nonattainment Area - Particulate Matter-2.5 (2012) dataset was updated on June 30, 2026 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: August 03, 2026 at 02:52 PM -
This is a dataset of the abundance of herbaceous species across ~15,000 plots across the US, along with related site date (e.g. climate, soil pH, etc.). This dataset is associated with the...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: August 03, 2026 at 12:44 AM -
The Nonattainment Area - Carbon Monoxide (CO-1971) dataset was updated on June 30, 2026 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: August 03, 2026 at 02:52 PM -
The Nonattainment Area - Nitrogen Dioxide (NO2-1971) dataset was updated on June 30, 2026 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: August 03, 2026 at 02:52 PM -
The Nonattainment Area - Particulate Matter- 10 (1987) dataset was updated on June 30, 2026 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: August 03, 2026 at 02:52 PM -
All 50 states and the District of Columbia submit annual reports of their CMAQ project obligations in March of every year. The FHWA uses these yearly submissions to maintain an active database...
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This dataset includes CMAQ model output, compiled publicly available observations, and model source code used in "Predicted impacts of heterogeneous chemical pathways on particulate sulfur over...
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To better understand the current air quality status in the District, the following summary highlights key pollutants and their compliance with the National Ambient Air Quality Standards (NAAQS)....
Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: August 03, 2026 at 02:40 AM -
This data includes gridded estimates of: (1) decadally averaged total N and S deposition for the conterminous US from 1800-2025, (2) critical loads from the National Critical Loads Database, and...
Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: August 03, 2026 at 12:42 AM -
The Nonattainment Area - Sulfur Dioxide (SO2-2010) dataset was updated on June 30, 2026 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation...
Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: August 03, 2026 at 02:52 PM -
January-February 2022 Fairbanks Emissions for the US EPA 1.33 km WRF-CMAQ domain. Portions of this dataset are inaccessible because: Raw emissions files in NetCDF IOAPI format are too large. Below...
Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: August 03, 2026 at 12:50 AM -
Maryland State Implementation Plans
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: August 02, 2026 at 11:11 PM -
The Nonattainment Area - Particulate Matter-2.5 Annual (1997) dataset was updated on June 30, 2026 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation...
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: August 03, 2026 at 02:52 PM -
This is the metadata for Coughlin et al. (2023) which estimates effects from atmospheric deposition of nitrogen (N) and sulfur (S) on tree species across the CONUS. The dataset is too large for...
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: August 03, 2026 at 12:49 AM
