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DC Subwatersheds

Published by Department of Energy and Environment | District of Columbia | Metadata Last Checked: January 27, 2026 | Last Modified: 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) Subsheds. This layer provided the granularity needed to facilitate further analysis.

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