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Federal
Substance Identification Information from EPA's Substance Registry
U.S. Environmental Protection Agency —
The Substance Registry Services (SRS) is the authoritative resource for basic information about substances of interest to the U.S. EPA and its state and tribal... -
Federal
StEWI v1.0.5 Data Products
U.S. Environmental Protection Agency —
Data products generated from StEWI v1.0.5. The source code and release notes can be found at https://github.com/USEPA/standardizedinventories/releases/tag/v1.0.5...