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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 -> 2021-09-30)

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 7,320 7,590 8,710 19,200 15,800 8,550 5,270 3,500 2,720 3,490 6,060 8,610
2 7,560 7,410 8,550 19,900 15,300 8,510 5,060 3,380 2,760 3,650 5,960 8,590
3 7,400 7,200 8,620 20,500 15,100 8,580 4,920 3,290 2,770 3,690 6,150 8,610
4 7,170 7,450 8,740 21,000 14,900 8,430 4,460 3,350 2,640 3,680 6,750 8,330
5 7,130 7,540 8,800 21,200 14,700 8,050 4,380 3,230 2,610 3,530 7,290 8,050
6 7,090 7,450 8,970 21,600 14,100 7,700 4,280 3,090 2,490 3,490 6,990 8,030
7 7,130 7,360 9,340 21,800 13,200 7,630 4,210 3,040 2,610 3,660 6,510 8,370
8 7,170 7,320 9,780 21,600 12,600 7,630 4,050 2,970 2,800 3,980 6,520 8,820
9 7,140 7,230 10,200 20,700 12,200 7,400 3,990 3,000 2,780 3,920 6,470 8,750
10 7,310 7,010 10,600 19,700 11,900 7,350 3,850 3,080 2,760 4,000 6,760 8,510
11 7,700 6,850 10,700 19,200 11,800 7,230 3,650 3,280 2,760 4,000 6,930 8,490
12 7,740 6,960 10,900 19,200 11,600 7,020 3,540 3,630 3,090 3,780 7,150 8,610
13 7,620 7,050 11,700 19,500 11,600 6,750 3,440 3,700 3,150 3,960 7,100 8,610
14 7,510 7,160 12,400 19,600 11,900 6,650 3,540 3,560 3,050 3,960 7,180 8,590
15 7,340 7,170 13,000 19,400 12,200 6,770 3,540 3,420 2,930 4,170 7,330 8,620
16 7,450 7,310 13,200 19,300 12,200 6,740 3,590 3,290 2,950 4,450 7,170 8,440
17 7,410 7,300 13,200 20,200 11,900 6,590 3,440 3,150 3,080 4,620 7,150 8,090
18 7,100 7,200 13,400 20,200 11,600 6,270 3,260 3,140 3,290 4,790 7,220 7,930
19 7,070 7,250 14,300 20,000 11,300 6,000 3,100 3,000 3,360 4,830 7,170 7,920
20 7,180 7,190 15,200 19,400 10,900 5,790 3,060 3,040 3,390 4,740 6,980 7,930
21 7,270 7,160 15,500 18,800 10,700 5,620 3,160 2,880 3,480 5,030 7,110 7,770
22 7,220 7,270 15,300 18,300 10,500 5,440 3,160 2,760 3,920 5,610 7,140 7,890
23 7,160 7,990 15,600 18,200 10,000 5,320 3,210 2,730 4,040 5,580 7,090 7,940
24 7,180 8,200 15,400 17,900 9,500 5,180 3,470 2,650 3,780 5,290 7,090 7,870
25 7,700 8,560 15,200 17,600 9,490 5,250 3,580 2,590 3,320 5,530 7,210 7,810
26 8,300 9,140 15,300 17,400 9,670 5,260 3,420 2,620 3,330 5,960 7,400 8,460
27 8,870 9,300 15,700 17,100 9,490 5,230 3,250 2,600 3,260 5,930 7,830 8,560
28 9,030 9,120 16,200 16,700 9,180 5,140 3,210 2,480 3,320 5,830 8,040 8,430
29 8,830 9,360 17,000 16,300 8,820 5,170 3,390 2,550 3,280 5,980 8,270 8,370
30 8,340   17,900 16,200 8,320 5,310 3,580 2,710 3,360 6,120 8,510 8,050
31 7,870   18,600   8,490   3,600 2,770   6,160   7,730