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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 01613000 POTOMAC RIVER AT HANCOCK, MD


Washington County, Maryland
Hydrologic Unit Code 02070004
Latitude  39°41'51.2", Longitude  78°10'40.4" NAD83
Drainage area 4,064  square miles
Gage datum 383.00 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 1932-10-01 -> 2025-09-30)

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 4,940 5,240 7,770 7,850 6,470 4,540 1,980 1,810 1,130 1,630 1,990 3,740
2 5,260 5,420 8,050 8,040 5,740 3,970 1,860 1,630 1,420 1,800 1,860 4,010
3 5,120 5,650 7,380 8,210 5,430 4,480 1,690 1,490 1,250 1,800 1,950 3,630
4 4,950 6,060 7,350 7,900 5,810 4,730 1,710 1,450 1,160 1,750 2,040 3,430
5 4,830 5,850 8,990 8,170 6,560 4,250 1,860 1,500 1,200 1,500 2,730 3,760
6 4,900 5,610 9,960 8,270 7,190 3,890 1,840 1,420 1,380 1,460 3,730 3,430
7 4,620 5,660 9,560 7,650 7,770 3,490 1,770 1,730 2,720 1,790 2,440 3,300
8 4,590 5,800 9,040 7,660 8,160 3,290 1,720 1,650 2,670 1,540 2,510 3,930
9 4,690 5,410 8,040 7,200 8,290 3,330 1,700 1,530 1,970 1,720 2,840 4,050
10 4,690 5,560 7,910 7,360 7,050 2,940 1,730 1,440 2,240 2,320 2,660 3,970
11 4,910 5,410 7,890 7,540 6,440 3,010 1,670 1,330 1,750 1,960 2,360 4,070
12 4,630 5,350 7,950 7,240 6,290 3,260 1,620 1,340 1,390 1,540 2,140 4,180
13 4,680 5,540 8,400 7,580 6,010 3,370 1,650 1,550 1,350 1,410 2,350 3,910
14 4,460 6,130 9,760 8,210 5,800 3,810 1,650 2,020 1,470 1,320 2,460 3,930
15 4,360 6,790 10,200 7,990 5,580 3,190 1,540 1,640 1,250 1,820 2,380 3,920
16 4,710 6,100 9,590 7,870 6,040 2,650 1,480 1,380 1,210 3,350 2,260 4,570
17 4,710 5,970 8,750 9,080 6,920 2,450 1,430 1,320 1,270 2,830 2,420 4,630
18 4,300 6,150 10,700 8,420 6,890 2,450 1,590 1,540 1,950 1,830 2,400 4,170
19 4,690 6,530 9,010 6,760 6,710 3,270 1,400 2,600 2,460 2,030 2,180 4,030
20 5,730 6,870 9,320 7,090 5,930 2,860 1,340 1,880 2,320 1,710 2,620 3,790
21 5,230 6,630 10,100 7,540 5,630 2,950 1,420 1,420 1,620 1,730 2,930 3,500
22 5,050 6,810 10,600 6,610 5,570 3,510 1,360 1,440 1,490 1,800 2,970 3,840
23 5,020 7,170 9,920 6,520 5,520 3,770 1,490 1,330 1,590 1,670 2,840 4,250
24 5,110 7,740 9,750 5,860 4,950 3,430 1,490 1,360 1,770 1,710 2,570 4,060
25 5,750 8,070 9,650 6,290 4,670 2,610 1,370 1,630 1,770 1,760 2,490 4,060
26 6,250 8,340 8,910 7,220 4,430 2,170 1,290 1,560 2,040 1,760 2,500 4,290
27 6,260 8,700 8,410 7,650 4,110 1,990 1,220 1,540 1,720 1,730 2,660 4,910
28 5,830 7,850 7,950 7,100 4,270 2,160 1,260 1,360 1,910 2,110 2,850 4,720
29 5,780 7,950 8,720 7,200 4,740 2,240 1,390 1,260 2,100 2,860 3,170 4,390
30 5,230   8,470 6,700 4,540 2,230 1,490 1,200 1,780 2,620 3,530 4,790
31 5,300   8,030   4,130   1,700 1,140   2,300   5,190