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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
1 141 804 1,390 897 321 22 3.9 11 12 33 44 86
2 392 812 1,290 961 302 19 5.1 8.9 12 33 45 82
3 455 748 1,390 860 278 14 6.6 6.8 13 33 48 79
4 484 682 1,550 811 248 16 6.7 4.4 11 33 47 91
5 564 553 1,450 827 225 16 5 4.8 8.9 34 45 87
6 725 559 1,540 820 194 14 3.4 6.9 11 36 44 87
7 896 655 2,630 771 99 15 4 8.9 13 50 49 87
8 1,220 700 2,030 837 86 14 5.6 7.7 20 45 48 101
9 5,360 907 1,790 883 183 15 8.2 7.6 88 40 44 99
10 2,560 1,290 1,240 862 215 16 6.8 7 91 35 40 101
11 3,120 1,290 1,130 750 281 12 10 23 59 31 38 101
12 2,710 1,280 1,030 624 249 12 8.1 17 40 29 38 90
13 2,490 870 945 573 205 7.4 7.3 10 31 31 42 85
14 2,660 873 1,030 733 213 4.6 7.5 9.7 22 34 43 80
15 2,650 1,260 985 739 229 5.3 14 9.1 19 48 44 83
16 3,240 2,890 993 599 224 4.9 8 11 25 49 77 73
17 3,040 1,930 1,030 446 244 5.5 10 11 18 47 68 78
18 3,640 1,420 1,070 398 184 9.2 9.9 8.8 16 46 66 80
19 3,450 1,160 1,290 348 48 9.9 14 10 14 42 60 78
20 2,860 1,800 1,420 257 29 9.4 12 17 14 47 58 76
21 3,460 2,870 1,410 200 24 9.7 8.7 19 18 43 56 77
22 3,400 2,430 1,430 176 25 8.8 5.8 22 19 39 61 80
23 2,700 2,230 1,580 172 18 6.5 4.8 39 17 44 63 100
24 2,390 1,960 1,750 161 18 5.8 5 20 18 44 60 114
25 2,010 1,580 2,010 135 22 4.7 5.7 11 24 41 59 117
26 1,560 1,490 1,350 113 102 6.8 18 10 24 42 63 103
27 1,120 1,350 1,040 98 146 5.9 7.4 11 25 51 68 82
28 926 1,360 1,010 89 144 5.4 6 18 21 47 69 89
29 777 191 894 213 107 4.2 8.6 31 32 41 75 90
30 708   821 248 39 3.4 10 39 24 42 80 102
31 712   807   26   12 17   43   104