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USGS Daily Statistics for the Nation

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 -> 2019-09-30)

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 13,900 14,400 19,000 22,400 17,000 11,700 6,680 5,090 3,720 6,000 6,550 10,600
2 13,800 14,000 18,700 22,100 15,700 11,900 6,010 5,170 3,760 5,590 6,010 11,700
3 14,000 14,400 19,300 22,500 14,700 11,700 5,820 4,790 3,510 5,600 5,880 12,000
4 13,700 15,700 19,000 21,200 14,400 12,500 5,310 4,810 3,540 5,570 5,950 10,600
5 13,100 16,800 19,800 21,100 15,300 12,800 5,230 4,730 3,610 5,250 6,410 10,500
6 12,800 16,800 23,000 21,500 17,000 11,500 5,360 4,430 4,080 4,950 7,820 11,400
7 12,700 16,400 24,500 21,000 17,900 11,000 5,200 4,230 5,660 4,970 9,040 10,600
8 12,300 15,800 24,000 19,500 18,200 9,930 5,390 4,410 7,940 5,380 7,730 10,300
9 12,900 15,300 23,000 19,400 18,300 9,180 5,230 4,570 7,400 5,110 8,110 11,300
10 13,500 14,400 21,200 19,100 18,700 8,930 5,110 4,270 5,690 6,430 8,410 11,300
11 12,600 14,400 20,800 19,300 16,900 8,560 5,290 4,050 6,000 6,880 7,980 12,200
12 12,500 14,400 21,200 19,100 16,800 8,440 4,950 4,300 5,240 5,620 7,110 13,200
13 12,000 14,500 21,600 18,700 17,300 9,070 5,100 4,680 4,370 4,750 7,110 12,700
14 12,300 15,500 22,900 19,700 17,100 9,830 5,300 5,320 4,210 4,930 7,520 12,000
15 12,300 17,000 25,000 20,800 16,000 10,100 5,050 5,460 4,530 5,180 7,440 11,700
16 12,000 17,300 25,500 20,800 16,300 8,710 4,860 4,590 4,400 7,110 7,470 11,800
17 12,800 16,000 23,900 21,900 17,700 7,690 4,670 4,080 4,320 9,510 7,190 12,600
18 12,500 15,500 22,900 23,500 18,000 7,430 4,570 4,440 4,760 7,300 7,300 12,200
19 12,100 16,400 25,200 21,200 18,400 7,490 4,990 5,900 6,600 6,270 7,110 11,100
20 13,800 17,200 24,100 18,100 17,400 9,120 4,740 6,580 7,150 6,490 7,020 10,600
21 15,900 17,800 25,600 19,000 15,500 8,260 4,980 5,270 6,270 5,930 7,530 10,500
22 14,800 17,900 27,500 19,600 14,900 9,750 4,880 4,520 5,050 5,790 8,430 10,500
23 13,700 18,800 28,200 18,300 14,900 11,000 4,630 4,500 5,380 5,860 8,950 10,900
24 13,800 19,600 26,400 17,400 14,900 11,500 4,660 4,810 5,660 5,830 8,610 11,100
25 15,300 21,500 25,300 16,300 13,800 9,160 4,520 5,030 5,500 5,910 8,120 10,800
26 17,300 21,900 24,100 16,900 12,700 7,380 4,460 4,680 6,300 5,930 8,290 11,000
27 17,400 21,600 22,700 19,800 12,200 6,620 4,180 4,980 6,560 6,040 8,060 11,700
28 17,200 21,200 22,200 20,700 11,600 6,630 4,030 4,490 5,680 6,140 8,350 12,600
29 16,300 23,300 22,300 19,000 11,600 7,030 4,050 3,860 6,100 6,860 9,490 12,300
30 15,200   24,000 18,200 12,100 6,820 3,990 3,590 6,640 8,120 10,100 12,100
31 14,600   23,500   11,900   4,340 3,380   7,860   13,000