TidalMapZekiah Swamp Run near Newtown, MD Water Level Today
NWS river forecast
| When | Stage | Flow |
|---|
Forecast from the NOAA National Water Prediction Service. Issued a few times a day and only while a forecast is active. Not for navigation.
Last 30 days
About this gauge
USGS gauge 01660920 sits on Zekiah Swamp Run and reads everything draining 80 square miles of the Lower Potomac basin. Its datum sits 34 feet above sea level NAVD88. Daily flow has been on record here since 1983, 41 years of it.
Normal flows here
Zekiah Swamp Run runs a median of 51 cfs at this gauge across 41 years of record. March is the fullest month at a median 104 cfs, and September the leanest at 3.5 cfs. The highest daily mean on record is 11,200 cfs in 2011, and the lowest is 0.0 cfs in 1999.
| Month | Median flow | Share of annual median |
|---|---|---|
| Jan | 82 cfs | 161% |
| Feb | 98 cfs | 192% |
| Mar | 104 cfs | 204% |
| Apr | 98 cfs | 193% |
| May | 62 cfs | 122% |
| Jun | 24 cfs | 48% |
| Jul | 8.2 cfs | 16% |
| Aug | 5.8 cfs | 11% |
| Sep | 3.5 cfs | 7% |
| Oct | 14 cfs | 27% |
| Nov | 39 cfs | 76% |
| Dec | 67 cfs | 131% |
Medians from the USGS daily-statistics record, 1983 to 2025. A month at 100% is running at its own long-term median.
Flood stages and record crests
Zekiah Swamp Run reaches flood stage at this gauge at 11 feet. NWS starts watching it at 5 feet. The highest crest on record is 6.8 feet, in September 2011.
| Category | Gage height |
|---|---|
| Action | 5 ft |
| Minor flooding | 11 ft |
| When | Crest |
|---|---|
| September 2011 | 6.8 ft |
| October 2018 | 6 ft |
| May 2008 | 5.5 ft |
| September 1999 | 5.5 ft |
| March 1994 | 5.3 ft |
Flood categories and crest history from the NOAA National Water Prediction Service, gauge ZSRM2. Stages are gage height, not depth. Not for navigation.
Nearby river gauges
- Mattawoman Creek near Pomonkey, MD
- Piscataway Creek at Piscataway, MD
- St Clements Creek near Clements, MD
- Mcintosh Run near Leonardtown, MD
- Cameron Run at Alexandria, VA
- Western Branch at Upper Marlboro, MD
- Fourmile Run at Alexandria, VA
- Accotink Creek at Keene Mill Rd at Springfield, VA
- Beaverdam Creek near Cheverly, MD
- Accotink Creek near Annandale, VA
- Long Branch near Annandale, VA
- Northwest Branch Anacostia River at Brentwood, MD
Live streamflow and gage height: USGS gauge 01660920. Percentile context computed against the gauge's period of record. Not for navigation.
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