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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 -> 2020-09-30)

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 13,800 14,400 18,900 22,400 17,000 11,700 6,680 5,080 3,700 5,950 6,670 10,600
2 13,800 14,000 18,600 22,000 15,700 11,900 6,010 5,160 3,750 5,540 6,120 11,600
3 13,900 14,300 19,200 22,400 14,700 11,700 5,850 4,780 3,500 5,550 5,920 11,900
4 13,600 15,600 18,900 21,100 14,400 12,500 5,360 4,810 3,530 5,530 5,990 10,600
5 13,000 16,700 19,700 21,000 15,300 12,800 5,260 4,720 3,600 5,210 6,430 10,500
6 12,700 16,700 22,800 21,400 17,000 11,500 5,380 4,430 4,070 4,920 7,800 11,300
7 12,600 16,400 24,300 20,900 17,900 11,000 5,240 4,250 5,630 4,930 9,000 10,500
8 12,300 15,800 23,800 19,300 18,200 9,930 5,620 4,430 7,870 5,340 7,700 10,200
9 12,800 15,400 22,800 19,200 18,300 9,180 5,450 4,560 7,350 5,070 8,060 11,200
10 13,400 14,600 21,100 19,000 18,700 8,930 5,230 4,270 5,650 6,380 8,360 11,200
11 12,500 14,500 20,600 19,200 16,900 8,560 5,370 4,040 5,950 6,830 7,930 12,100
12 12,500 14,400 21,100 19,100 16,800 8,440 5,020 4,290 5,200 5,570 7,070 13,100
13 12,000 14,500 21,400 18,700 17,300 9,070 5,150 4,660 4,340 4,720 7,060 12,600
14 12,300 15,500 22,700 19,700 17,100 9,830 5,350 5,300 4,190 4,900 7,470 12,000
15 12,300 17,000 24,800 20,800 16,000 10,100 5,090 5,430 4,500 5,150 7,390 11,600
16 12,000 17,300 25,300 21,000 16,300 8,710 4,900 4,580 4,370 7,060 7,420 11,700
17 12,800 16,000 23,700 22,000 17,700 7,690 4,690 4,070 4,290 9,430 7,140 12,500
18 12,500 15,500 22,700 23,500 18,000 7,430 4,590 4,430 4,730 7,240 7,240 12,200
19 12,100 16,300 25,000 21,100 18,400 7,490 5,000 5,870 6,550 6,230 7,060 11,100
20 13,800 17,100 23,900 18,100 17,400 9,120 4,750 6,560 7,090 6,440 6,970 10,600
21 15,800 17,800 25,400 19,000 15,500 8,260 4,990 5,250 6,220 5,900 7,470 10,500
22 14,800 17,800 27,400 19,600 14,900 9,750 4,890 4,510 5,010 5,750 8,370 10,500
23 13,600 18,600 28,000 18,300 14,900 11,000 4,650 4,490 5,340 5,830 8,880 10,900
24 13,800 19,500 26,200 17,300 14,900 11,500 4,730 4,800 5,610 5,790 8,560 11,000
25 15,300 21,400 25,100 16,300 13,800 9,160 4,550 5,010 5,450 5,880 8,070 10,800
26 17,500 21,800 24,000 16,900 12,700 7,380 4,490 4,670 6,250 5,900 8,240 10,900
27 17,700 21,500 22,600 19,700 12,200 6,620 4,210 4,960 6,500 6,020 8,010 11,600
28 17,400 21,100 22,100 20,700 11,600 6,630 4,060 4,470 5,640 6,130 8,300 12,600
29 16,400 22,700 22,200 19,000 11,600 7,030 4,060 3,860 6,050 6,840 9,420 12,200
30 15,200   23,900 18,200 12,100 6,820 4,000 3,590 6,590 8,070 10,000 12,100
31 14,600   23,500   11,900   4,330 3,380   7,820   13,000