Watersheds of the Chesapeake Bay
Bohemia Creek | Broad Creek | C&D Canal West | Chester River | Choptank River | Deep Creek | Elk River | Gravelly Branch | Gum Branch | Marshyhope Creek | Nanticoke River | Perch Creek | Pocomoke River | Sassafras River | Wicomico River
The drainage area of the Choptank River Watershed within Delaware is approximately 97 mi2.
The designated uses for the Choptank River Watershed include primary contact recreation, secondary contact recreation, fish, aquatic life and wildlife, agricultural water supply, and industrial water supply.
Nutrient TMDLs for the Choptank River Watershed include a yearly-average cap on total nitrogen at 1,359 pounds per day and a 40% reduction in phosphorus levels. Also, the nonpoint source bacteria load in the Choptank requires a 29% reduction.
EPA established a Total Maximum Daily Load for nitrogen, phosphorus, and sediment for the entire Chesapeake Bay Watershed. This TMDL requires reductions of approximately 24% for nitrogen and 20% for phosphorus between 2009 and 2025 from all of the Chesapeake watersheds within Delaware. Sediment loads from Delaware's portion of the Chesapeake must remain at 2009 levels under this TMDL.
Each of the sites is sampled through the program listed above for a consistent suite of environmental contaminants. These contaminants are broadly classified as Volatile Organic Compounds (VOCs), Semi-Volatile Organic Compounds (SVOCs), Pesticides, Polychlorinated Biphenyls (PCBs) and Metals as listed using USEPA and DNREC defined standards. When sites are adjacent to water bodies sediment samples are collected to assess potential impact from a site on the health of the waters.
If you would like to view reports for any of the sites in the SIRS program please follow the link theDNREC Environmental Navigator to search by map for the Choptank Watershed.
Total Maximum Daily Loads (TMDLs) Analysis for Chesapeake Bay Drainage Basin, Delaware: Chester River, Choptank River, Marshyhope Creek, Nanticoke River, Gum Branch, Gravelly Branch, Deep Creek, Broad Creek, and Pocomoke River Watersheds
Assessment Report of Delaware's Chesapeake Basin
Delaware's Chesapeake Bay Watershed Implementation Plan (WIP)
U.S. EPAs Chesapeake Bay TMDL documents