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USGS Daily Statistics for Maryland

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The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 01646500 POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA


Montgomery County, Maryland
Hydrologic Unit Code 02070008
Latitude  38°56'59.2", Longitude  77°07'39.5" NAD83
Drainage area 11,560  square miles
Gage datum 37.20 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month
Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1929-10-01 -> 2024-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 13,700 14,200 19,100 22,000 17,300 11,500 6,570 4,960 3,740 5,860 6,660 10,400
2 13,700 13,700 19,300 21,700 16,300 11,800 5,940 5,040 4,010 5,460 6,200 11,400
3 13,900 14,100 19,800 22,000 15,100 11,500 5,780 4,670 4,280 5,470 5,970 11,700
4 13,800 15,400 19,200 20,800 14,700 12,200 5,310 4,750 3,900 5,450 6,000 10,400
5 13,200 16,600 20,000 20,700 15,400 12,500 5,190 4,670 3,770 5,160 6,390 10,400
6 12,800 16,800 22,900 21,000 17,200 11,300 5,300 4,380 4,160 4,880 7,700 11,100
7 12,700 16,400 24,200 20,600 18,300 10,800 5,170 4,240 5,620 4,890 8,850 10,300
8 12,300 15,800 23,600 19,300 19,000 9,760 5,530 4,390 7,750 5,260 7,570 10,100
9 12,700 15,300 22,500 19,300 19,200 9,050 5,420 4,500 7,270 4,990 7,920 11,000
10 13,300 14,400 20,800 19,000 19,100 8,770 5,150 4,230 5,710 6,240 8,200 11,000
11 12,400 14,300 20,400 19,100 17,100 8,460 5,270 4,030 5,960 6,660 7,790 11,900
12 12,300 14,300 20,800 19,000 16,900 8,410 4,940 4,270 5,200 5,460 7,010 12,900
13 11,900 14,400 21,100 18,900 17,300 8,990 5,070 4,650 4,370 4,650 7,010 12,300
14 12,200 15,300 22,300 19,800 16,900 9,720 5,270 5,220 4,190 4,820 7,580 11,700
15 12,200 16,700 24,300 20,700 15,800 9,930 5,030 5,330 4,460 5,060 7,590 11,400
16 11,900 17,100 24,800 20,700 16,000 8,580 4,820 4,530 4,330 6,880 7,570 11,700
17 12,600 15,900 23,200 21,700 17,400 7,600 4,610 4,040 4,270 9,150 7,220 12,600
18 12,300 15,400 22,300 23,100 17,600 7,340 4,510 4,420 4,680 7,050 7,300 12,200
19 11,900 16,300 24,500 20,800 18,000 7,380 4,910 5,820 6,390 6,070 7,100 11,100
20 13,500 17,100 23,400 17,900 17,100 8,930 4,690 6,490 6,910 6,280 6,980 10,600
21 15,600 17,700 24,900 18,700 15,200 8,150 4,920 5,210 6,060 5,750 7,430 10,500
22 14,500 17,700 26,800 19,300 14,600 9,650 4,820 4,480 4,900 5,600 8,280 10,400
23 13,400 18,500 27,400 18,000 14,600 10,900 4,580 4,440 5,320 5,670 8,760 11,100
24 13,500 19,300 25,700 17,000 14,600 11,300 4,650 4,720 5,890 5,680 8,430 11,300
25 15,100 21,100 24,600 16,100 13,500 9,070 4,480 4,920 5,710 5,770 7,950 11,400
26 17,100 21,600 23,500 16,600 12,500 7,330 4,410 4,610 6,330 5,810 8,110 11,700
27 17,400 21,500 22,200 19,400 12,000 6,590 4,140 4,880 6,490 5,910 7,880 12,200
28 17,100 21,100 21,800 20,300 11,500 6,590 4,000 4,400 5,620 6,010 8,160 12,800
29 16,100 22,700 21,900 18,700 11,400 6,940 4,000 3,810 5,980 6,740 9,240 12,300
30 14,900   23,500 18,100 11,900 6,720 3,920 3,540 6,470 7,990 9,830 12,100
31 14,300   23,000   11,800   4,240 3,340   7,770   12,900