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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 88 - 89 years of record in, ft3/s   (Calculation Period 1929-10-01 -> 2018-09-30)

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 13,600 14,300 18,800 22,500 17,000 11,500 6,580 4,900 3,640 5,370 6,470 10,500
2 13,500 13,900 18,500 22,200 15,700 11,700 5,930 4,960 3,660 5,150 5,920 11,600
3 13,700 14,400 19,200 22,600 14,700 11,200 5,760 4,450 3,410 5,270 5,650 11,800
4 13,500 15,700 18,800 21,300 14,400 11,200 5,260 4,260 3,440 5,310 5,730 10,500
5 12,900 16,800 19,600 21,200 15,200 11,300 5,180 4,070 3,540 5,020 6,220 10,400
6 12,600 16,800 22,800 21,600 16,500 10,900 5,300 4,010 4,030 4,750 7,500 11,300
7 12,500 16,400 24,400 21,100 17,400 10,600 5,120 3,950 5,640 4,800 8,600 10,500
8 12,200 15,700 24,000 19,500 17,800 9,700 5,330 4,200 7,920 5,230 7,390 10,200
9 12,700 15,100 23,000 19,400 18,100 9,020 5,180 4,380 7,280 4,980 7,830 11,200
10 13,400 14,200 21,200 19,200 18,600 8,810 5,070 4,080 4,970 6,330 8,110 11,300
11 12,500 14,300 20,600 19,300 16,800 8,420 5,260 3,890 4,590 6,790 7,490 12,200
12 12,500 14,200 21,000 19,200 16,800 8,140 4,930 4,180 4,290 5,500 6,750 13,200
13 11,900 14,300 21,400 18,700 17,200 8,690 5,090 4,550 3,800 4,610 6,770 12,700
14 12,200 15,200 22,800 19,900 16,800 9,530 5,300 5,210 3,710 4,750 7,180 12,000
15 12,300 16,700 24,900 20,900 15,500 9,880 5,050 5,340 4,120 5,030 7,060 11,600
16 11,900 17,100 25,500 20,700 15,600 8,570 4,860 4,470 4,110 7,010 7,020 11,200
17 12,700 15,800 23,900 21,500 17,100 7,580 4,660 3,970 4,080 9,450 6,700 11,100
18 12,500 15,300 22,900 22,900 17,200 7,360 4,550 4,360 4,480 7,230 6,800 11,200
19 12,100 16,300 25,200 20,800 17,400 7,430 4,990 5,840 5,980 6,210 6,640 10,500
20 13,700 17,100 24,100 17,800 16,400 9,110 4,740 6,500 6,530 6,430 6,600 10,200
21 15,600 17,800 25,600 18,600 14,600 8,240 4,940 5,180 5,880 5,880 7,120 10,200
22 14,400 17,800 27,100 19,300 14,300 9,690 4,530 4,270 4,740 5,740 8,020 9,970
23 13,400 18,600 27,800 18,100 14,500 10,800 4,310 4,150 5,130 5,820 8,610 10,100
24 13,600 19,200 26,200 17,200 14,500 10,800 4,400 4,580 5,430 5,790 8,300 10,400
25 14,900 21,000 25,200 16,200 13,500 8,640 4,250 4,880 5,160 5,880 7,580 10,400
26 16,800 21,300 24,100 16,900 12,600 7,040 4,120 4,570 5,770 5,900 7,710 10,700
27 17,100 21,300 22,700 19,800 12,100 6,390 3,860 4,910 5,720 5,990 7,560 11,500
28 17,000 21,000 22,200 20,700 11,500 6,460 3,790 4,420 4,680 6,070 7,960 12,400
29 16,100 23,300 22,300 18,900 11,500 6,910 3,890 3,790 4,670 6,780 9,210 12,000
30 15,000   24,000 18,200 12,000 6,710 3,880 3,530 5,490 8,060 9,880 11,700
31 14,500   23,600   11,800   4,220 3,330   7,800   12,700