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USGS Daily Statistics for Arizona

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Welcome to the NWIS-Web for the Arizona Water Science Center


The majority of USGS Gaging Stations are funded though a cooperative program between the USGS other interested agencies.
Follow this link for information on the Cooperative Water Program with the USGS.

Arizona Water Science Center Home Page
Colorado Basin River Forecast Center (CBRFC) - provided by the National Weather Service, AHPS. CBRFC on an interactive map.
Threatened and Endangered USGS Gaging Stations in Arizona

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 09519501 GILA R BLW GILLESPIE DAM, AZ (LOW-FLOW STATION)


Maricopa County, Arizona
Hydrologic Unit Code 15070101
Latitude  33°13'45", Longitude 112°46'00" NAD27
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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 1992-10-01 -> 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
1 135 773 1,340 863 309 21 3.7 11 12 33 42 84
2 377 781 1,240 924 290 18 4.9 8.9 12 33 43 80
3 437 719 1,340 826 268 14 6.4 6.8 13 33 46 78
4 466 656 1,490 780 239 15 6.5 4.4 11 33 45 89
5 543 532 1,390 795 216 16 4.8 4.8 8.9 34 43 85
6 698 538 1,480 788 187 13 3.2 6.9 11 36 42 85
7 861 629 2,530 742 96 14 3.8 8.9 13 50 47 85
8 1,170 673 1,950 805 83 14 5.4 7.7 20 45 46 99
9 5,150 873 1,720 849 176 14 8.2 7.6 88 40 42 98
10 2,460 1,240 1,190 829 207 15 6.8 7 91 35 39 99
11 3,000 1,240 1,090 721 270 12 10 23 59 31 36 99
12 2,600 1,230 989 600 240 11 8.1 17 40 29 37 88
13 2,390 837 909 551 197 7.2 7.3 10 31 31 40 83
14 2,560 839 989 705 205 4.4 7.5 9.7 22 34 41 79
15 2,550 1,210 947 710 220 5.1 14 9.1 19 48 42 80
16 3,110 2,780 955 576 215 4.7 8 11 25 49 74 70
17 2,920 1,850 991 429 234 5.3 10 11 18 47 66 75
18 3,500 1,360 1,030 383 177 8.8 9.9 8.8 16 46 64 77
19 3,310 1,110 1,240 335 46 9.5 14 10 14 42 57 75
20 2,750 1,730 1,360 247 28 9.1 12 17 14 47 56 73
21 3,320 2,760 1,360 192 23 9.3 8.7 19 18 43 54 74
22 3,270 2,340 1,370 169 24 8.5 5.8 22 19 39 59 77
23 2,600 2,150 1,510 165 18 6.2 4.8 39 17 42 60 96
24 2,300 1,880 1,680 154 17 5.6 5 20 18 42 58 111
25 1,930 1,520 1,930 129 21 4.5 5.7 11 24 40 57 114
26 1,500 1,440 1,300 108 98 6.5 18 10 24 40 61 99
27 1,080 1,290 996 94 140 5.7 7.4 11 25 49 65 79
28 891 1,310 975 85 138 5.2 6 18 21 45 67 86
29 747 191 860 205 103 4 8.6 31 32 40 72 86
30 681   790 239 38 3.3 10 39 24 41 78 98
31 685   776   25   12 17   41   100