Middle Potomac-Anacostia-Occoquan HUC8 02070010
A 3,375 km² sub-basin of the Mid-Atlantic region in DC, MD, VA. Drought coverage is from the US Drought Monitor (map of 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
65
Moderate
Drought index
102
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
47%
of 15 reporting
Median flow
45%
p25 of record
Water assets
4,324
14 springs · 1,483 wells
USGS gauges (27)
- Northwest Branch Anacostia River nr Colesville, MD016505001 cfsp5 · much below normal
- PAINT BRANCH NEAR COLLEGE PARK, MD016491901 cfsp6 · much below normal
- PAINT BRANCH TRIBUTARY NEAR COLESVILLE, MD016491500 cfsp7 · much below normal
- NORTHEAST BRANCH ANACOSTIA RIVER AT RIVERDALE, MD016495007 cfsp7 · much below normal
- Rock Creek at Joyce Rd Washington, DC016480107 cfsp13 · below normal
- FOURMILE RUN AT ALEXANDRIA, VA016525003 cfsp19 · below normal
- SLIGO CREEK NEAR TAKOMA PARK, MD016508001 cfsp20 · below normal
- HICKEY RUN AT NATIONAL ARBORETUM AT WASHINGTON, DC016517700 cfsp25 · normal
- LONG BRANCH NEAR ANNANDALE, VA016545000 cfsp32 · normal
- WATTS BRANCH AT WASHINGTON, DC016518001 cfsp42 · normal
- ACCOTINK CREEK NEAR ANNANDALE, VA016540004 cfsp43 · normal
- PISCATAWAY CREEK AT PISCATAWAY, MD016536005 cfsp50 · normal
- FLATLICK BRANCH ABOVE FROG BRANCH AT CHANTILLY, VA016569032 cfsp53 · normal
- CAMERON RUN AT ALEXANDRIA, VA0165300010 cfsp56 · normal
- CEDAR RUN NEAR CATLETT, VA016560009 cfsp59 · normal
- TURKEY BRANCH NEAR ROCKVILLE, MD01647850no readingno long-term record
- ROCK CREEK AT SHERRILL DRIVE WASHINGTON, DC0164800082 cfsno long-term record
- Luzon Branch above Rock Creek at Washington DC016480110 cfsno long-term record
- NORTHWEST BRANCH ANACOSTIA RIVER AT BRENTWOOD, MD016510036 cfsno long-term record
- BEAVERDAM CREEK NEAR CHEVERLY, MD01651730-5 cfsno long-term record
- ANACOSTIA RIVER AT KENILWORTH AT WASHINGTON, DC01651760no readingno long-term record
- Anacostia River nr Buzzard Point at Washington, DC01651827-526 cfsno long-term record
- FOUR MILE RUN AT HWY 29 AT FALLS CHURCH, VA016520900 cfsno long-term record
- TRIPPS RUN AT FALLS CHURCH, VA016526200 cfsno long-term record
- MEETINGHOUSE BRANCH AT CAMP SPRINGS, MD016536200 cfsno long-term record
- LONG BRANCH AT OLLEY LANE NR FAIRFAX, VA016541071 cfsno long-term record
- ACCOTINK CREEK AT KEENE MILL RD AT SPRINGFIELD, VA016546706 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 102 | 0 | 7/15 | p25 |
Top water assets
- 66Lake Frankreservoir
- 66New Bald Eagle Road Swmreservoir
- 66Greencastle Lakes Dam (Ballinger Drive)reservoir
- 66Lake Needwoodreservoir
- 66Parker Farms Damreservoir
- 66Winslow Damreservoir
- 66Contee Main Settling Pondreservoir
- 65Sligo Creek Near Takoma Park, Mdriver
- 65Piscataway Creek At Piscataway, Mdriver
- 65Paint Branch Near College Park, Mdriver