• Organization: U.S. Environmental Protection Agency
• Updated: 2020-05-27

The data set is composed of inputs and outputs of the DST demonstration and application to risk-based TMDLs and water quality risk assessment in Midwest river basins (Upper Mississippi River, Ohio...

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• Organization: U.S. Environmental Protection Agency
• Updated: 2015-05-01T00:00:00.000+00:00

Archive geospatial download files for pre-2015 ATTAINS data, including: Pre-2015 303(d) Listed Impaired Waters Reach Indexed Dataset Archive, Pre-2015 305(b) Waters As Assessed Reach Indexed...

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• Organization: Vermont Center for Geographic Information
• Updated: 2022-03-24T11:53:23.000Z

The dataset contains the boundaries of the MS4 general permit, which are defined as the intersection of US Census urbanized areas and the watershed boundaries of the stormwater-impaired waters...

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• Organization: District of Columbia
• Updated: 2024-09-26T16:31:00.000Z

This layer depicts the conglomeration of the 4 layers used for TMDLs. It contains TMDL Subsheds, Direct Drain Overland (not piped), Direct Drain Sewersheds (piped), and Combined Sewer (CSS)...

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• Organization: U.S. Environmental Protection Agency
• Updated: 2016-12-31

Publicly available weblinks used to develop research project. This dataset is associated with the following publication: Hall, E., R. Hall, J. Aron, S. Swanson, M. Philbin, R. Schaefer, T....

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• Organization: Department of the Interior
• Updated: 2020-08-25T00:00:00Z

This data release provides a set of Hydrological Simulation Program--Fortran (HSPF) model files representing 5 EPA-selected future climate change scenarios for the Upper Charles River Basin in...

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• Organization: Department of the Interior
• Updated: 2020-11-17T00:00:00Z

Under section 303(d) of the 1972 Clean Water Act, states, territories, and authorized tribes are required to develop lists of impaired waters. These impaired waters do not meet water quality...

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• Organization: Vermont Center for Geographic Information
• Updated: 2022-05-25T13:11:29.000Z

Stormwater impaired watersheds occuring on both the Priority Waters (Part D - Completed TMDL) and 303(d) list of waters (Part A - need TMDL) The Vermont State Legislature has required the Agency...

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• Organization: U.S. Environmental Protection Agency
• Updated: 2025-04-08

Publication of EPA’s Nutrient Inventory is a critical step towards thorough mapping and accounting of sources of N and P to US landscapes. However, summaries of nutrients within accumulative...

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