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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 01100000 MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA


Middlesex County, Massachusetts
Hydrologic Unit Code 01070006
Latitude  42°38'45", Longitude  71°17'56" NAD27
Drainage area 4,635  square miles
Contributing drainage area 4,421  square miles
Gage datum 4.37 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 1922-10-01 -> 2023-09-30)

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 7,400 7,630 8,760 19,100 15,800 8,460 5,290 3,710 2,730 3,490 6,200 8,590
2 7,660 7,430 8,590 19,800 15,400 8,410 5,100 3,540 2,830 3,640 6,140 8,600
3 7,520 7,220 8,660 20,400 15,200 8,490 5,020 3,430 2,880 3,680 6,260 8,610
4 7,290 7,460 8,760 20,900 15,100 8,350 4,660 3,470 2,760 3,670 6,810 8,320
5 7,250 7,600 8,820 21,100 14,900 7,970 4,630 3,330 2,710 3,550 7,320 8,050
6 7,220 7,530 8,980 21,400 14,200 7,630 4,520 3,170 2,570 3,530 7,010 8,010
7 7,250 7,430 9,350 21,700 13,300 7,540 4,390 3,110 2,670 3,690 6,520 8,350
8 7,270 7,380 9,830 21,400 12,600 7,550 4,190 3,040 2,850 3,990 6,510 8,840
9 7,220 7,290 10,200 20,600 12,200 7,320 4,120 3,020 2,830 3,930 6,460 8,800
10 7,370 7,080 10,600 19,600 11,900 7,300 4,020 3,100 2,840 3,990 6,740 8,540
11 7,740 6,920 10,700 19,100 11,700 7,200 3,890 3,290 2,840 3,990 6,900 8,500
12 7,750 7,030 11,000 19,100 11,600 6,980 3,860 3,630 3,140 3,780 7,130 8,620
13 7,670 7,120 11,700 19,400 11,500 6,710 3,790 3,690 3,190 3,950 7,150 8,630
14 7,610 7,230 12,400 19,500 11,800 6,610 3,860 3,550 3,080 3,960 7,290 8,610
15 7,470 7,220 13,000 19,300 12,200 6,730 3,810 3,410 2,970 4,200 7,440 8,610
16 7,540 7,350 13,200 19,200 12,100 6,690 3,860 3,280 2,980 4,500 7,260 8,430
17 7,480 7,340 13,200 20,000 11,800 6,550 3,780 3,130 3,100 4,640 7,220 8,100
18 7,170 7,300 13,400 20,000 11,500 6,260 3,620 3,130 3,300 4,800 7,270 7,970
19 7,140 7,410 14,300 19,800 11,200 6,010 3,490 2,990 3,380 4,840 7,210 7,950
20 7,240 7,360 15,200 19,300 10,900 5,790 3,430 3,060 3,400 4,740 7,010 7,950
21 7,320 7,300 15,500 18,700 10,600 5,600 3,510 2,910 3,500 5,010 7,130 7,780
22 7,260 7,390 15,300 18,200 10,500 5,420 3,480 2,790 3,940 5,580 7,140 7,890
23 7,200 8,120 15,600 18,100 10,000 5,250 3,480 2,760 4,060 5,540 7,090 8,000
24 7,220 8,370 15,400 17,800 9,460 5,120 3,690 2,720 3,800 5,250 7,080 8,130
25 7,730 8,740 15,200 17,700 9,440 5,180 3,740 2,690 3,370 5,490 7,180 8,110
26 8,340 9,260 15,400 17,400 9,600 5,200 3,550 2,700 3,410 5,940 7,370 8,730
27 8,940 9,370 15,700 17,100 9,410 5,220 3,370 2,660 3,320 5,940 7,790 8,790
28 9,100 9,180 16,200 16,700 9,100 5,150 3,320 2,520 3,350 5,890 8,010 8,590
29 8,880 9,360 17,000 16,200 8,740 5,220 3,500 2,570 3,300 6,030 8,240 8,470
30 8,380   17,800 16,200 8,250 5,360 3,750 2,730 3,370 6,140 8,480 8,130
31 7,910   18,500   8,400   3,850 2,790   6,210   7,800