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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 09486055 RILLITO CREEK AT LA CHOLLA BLVD NEAR TUCSON, AZ.


Pima County, Arizona
Hydrologic Unit Code 15050301
Latitude  32°18'12", Longitude 111°00'41" NAD27
Drainage area 922  square miles
Gage datum 2,260 feet above NGVD29
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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 1995-10-01 -> 2024-09-30)

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 12 27 28 4.3 0. 0. 10 55 27 0.93 0. 28
2 1.5 1.9 12 15 0. 0. 3.5 13 8.8 0. 0. 3.9
3 1.4 0.13 5.9 9.9 0. 0. 0.87 7.6 50 0. 0.27 0.24
4 16 0.12 6.5 5.4 1.4 0. 3.9 6.2 11 0.05 0.24 1.3
5 8.7 0.07 6.4 2.6 0. 0.18 14 39 12 0.55 0.01 0.
6 4.8 0.05 4 1.5 0. 0. 7 48 13 4.9 2.5 0.04
7 12 1 6.2 0.01 0. 0. 23 14 36 2.2 54 0.34
8 12 0.01 34 0.61 0. 0. 6 10 53 6.9 6 22
9 0.47 25 17 0.02 2.6 0.27 0.01 31 3.5 10 0.48 14
10 0.54 5.3 10 0. 0.44 0. 4.6 12 46 4.3 0.14 4.4
11 0. 7 5.6 0. 0. 0. 26 65 8.7 1.7 3.3 6.6
12 0. 59 6.6 0. 0. 0. 3.1 30 1.5 37 1.8 9.7
13 0. 19 5.9 0. 0. 0. 9.6 26 2.1 0.87 6.1 9.2
14 0.2 7.7 1.5 0. 0. 0. 29 49 0.02 1.9 0. 5.1
15 0.73 136 0.81 0. 0. 0. 103 29 4.2 0.05 0. 0.06
16 65 17 0.02 0. 0. 2.6 5.6 21 1.2 1.8 0.98 0.
17 114 6 0. 0. 0. 0.11 7.7 22 1.2 4.2 0. 1.5
18 23 61 3.5 0. 0. 0. 0.57 21 12 1.2 0. 0.02
19 6.9 17 0.53 0. 0. 0. 17 32 12 0.81 2.2 0.31
20 1.3 27 0. 0. 0. 0. 19 44 7.2 0.35 3.4 0.04
21 35 21 0. 0. 0. 0. 11 21 6.6 4.5 6.8 0.21
22 20 18 0.1 0. 0. 0. 18 6.5 1.3 75 3.5 3.6
23 7.3 16 0.15 0. 0. 0. 235 7.6 0.01 182 3.3 0.46
24 3.1 17 0. 0. 0. 0.04 26 18 8.9 15 0. 5.6
25 1.4 29 0. 0. 0. 0. 243 6.7 2.7 0. 0.02 2.6
26 2.5 14 0. 0.56 0. 2.6 18 24 5.9 0. 0. 0.08
27 8.5 11 0. 0. 0. 1.2 21 11 0.32 0. 0. 5.3
28 115 12 0. 0. 0.08 1.8 71 19 0.78 7.7 0.01 0.21
29 12 0. 0. 0. 0. 7.9 146 11 0. 0.91 4.2 0.19
30 16   2.7 0. 0. 14 53 2.1 4.6 1.4 1.7 8.8
31 73   3.6   0.   425 27   0.   5.9