District businesses selling food or alcohol are required to charge $.05 for each disposable paper or plastic carryout bag. Find out about DC's Bag Law.
The District Department of the Environment offers the following maps for your review:
- DC Detailed Flood Zone Map
- DC Flood Index Map
- DC Radon Map
- Green DC Map
- Map of Entire Anacostia Watershed
- Map of Known Wetlands
- Real-time Water Quality Map
- Map of Watershed Protection Restoration Projects
A tool to help District of Columbia property owners design, plan, and install green projects on their properties. You can lower your bills and protect the environment by saving energy and reducing stormwater runoff.
Provides data on the District's environmental sustainability performance, download data and charts, as well as learn more about various measures of sustainability.
DC Water operates a wastewater collection system comprised of "separate" and "combined" sewers. Since the early 1900's, sewers constructed within the District have been separate systems and no new combined sewer system (CSS) have been built.
Separate systems are comprised of two independent piping systems: one system for "sanitary" sewage (i.e. sewage from homes and businesses) and one system for storm water. In the District, approximately two thirds of the District is served by a municipal separate storm sewer system (MS4). The remaining one-third is served by a CSS. The CSS is outside the legal jurisdiction of the Storm Water Administration.
The MS4 system discharges into portions of the Potomac, Anacostia and Rock Creek watersheds. To learn what watershed you live and weather you live in the CSO or MS4 area.