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USGS Daily Statistics for New Hampshire

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To view real-time groundwater levels in New Hampshire. click here

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 01092000 MERRIMACK R NR GOFFS FALLS, BELOW MANCHESTER, NH


Hillsborough County, New Hampshire
Hydrologic Unit Code 01070002
Latitude  42°56'53", Longitude  71°27'50" NAD27
Drainage area 3,092  square miles
Gage datum 108.58 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 1936-10-01 -> 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 5,360 4,630 5,540 12,900 11,700 6,090 3,920 2,730 2,060 2,540 4,680 6,030
2 5,280 4,500 5,440 13,500 11,500 6,040 3,860 2,580 2,150 2,710 4,670 6,040
3 5,130 4,440 5,540 14,100 11,300 6,220 3,830 2,540 2,060 2,810 4,740 6,050
4 4,950 4,700 5,530 14,600 11,100 6,030 3,620 2,560 1,880 2,690 5,130 5,790
5 4,850 4,850 5,470 14,800 10,900 5,680 3,470 2,420 1,820 2,590 4,980 5,540
6 4,750 4,790 5,490 15,300 10,300 5,430 3,340 2,340 1,760 2,500 4,710 5,430
7 4,790 4,700 5,740 15,000 9,710 5,300 3,180 2,280 1,920 2,670 4,570 5,770
8 4,760 4,690 6,080 14,500 9,180 5,230 3,030 2,260 1,960 2,820 4,690 6,160
9 4,710 4,600 6,300 13,900 8,910 5,070 2,910 2,400 1,970 2,850 4,760 5,940
10 4,840 4,340 6,610 13,500 8,760 4,850 2,760 2,450 1,960 2,900 4,980 5,820
11 5,050 4,300 6,730 13,500 8,560 4,680 2,790 2,600 1,970 2,900 5,080 5,960
12 4,960 4,360 6,890 13,700 8,370 4,600 2,800 2,850 2,140 2,880 4,980 6,200
13 5,070 4,380 7,080 13,900 8,450 4,530 2,790 2,710 2,180 2,920 4,990 6,390
14 5,060 4,420 7,460 14,000 8,770 4,610 2,840 2,570 2,190 2,820 5,260 6,260
15 4,980 4,410 7,850 14,100 9,010 4,800 2,900 2,540 2,170 3,040 5,270 6,080
16 5,020 4,440 7,930 14,400 8,830 4,780 2,870 2,400 2,200 3,310 5,140 5,810
17 4,860 4,420 8,040 15,000 8,600 4,600 2,800 2,270 2,130 3,450 5,140 5,510
18 4,640 4,440 8,220 14,800 8,430 4,330 2,640 2,170 2,230 3,490 5,120 5,610
19 4,540 4,430 8,370 14,500 8,250 4,120 2,570 2,150 2,280 3,470 4,840 5,840
20 4,610 4,440 8,680 14,000 8,000 3,960 2,520 2,070 2,330 3,370 4,660 5,660
21 4,640 4,480 9,000 13,600 7,810 3,830 2,580 2,000 2,550 3,670 4,880 5,490
22 4,610 4,770 9,180 13,400 7,630 3,680 2,490 1,930 3,030 4,090 4,980 5,720
23 4,550 5,250 9,430 13,200 7,170 3,620 2,470 1,980 3,110 4,000 5,000 5,830
24 4,660 5,290 9,400 13,100 6,820 3,530 2,660 1,950 2,650 3,900 4,860 5,980
25 4,930 5,540 9,520 13,000 6,840 3,640 2,590 1,870 2,440 4,160 4,810 6,030
26 5,340 5,910 9,750 12,800 6,880 3,620 2,560 1,870 2,380 4,440 5,120 6,230
27 5,690 5,950 10,200 12,600 6,740 3,770 2,370 1,820 2,370 4,440 5,570 6,110
28 5,790 5,800 10,800 12,400 6,460 3,800 2,380 1,710 2,410 4,510 5,830 5,990
29 5,580 6,150 11,500 12,200 6,270 3,840 2,460 1,830 2,400 4,740 6,030 5,940
30 5,210   12,000 12,000 6,130 3,990 2,670 2,050 2,480 4,780 6,090 5,660
31 4,870   12,500   6,130   2,830 2,100   4,730   5,460