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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 09527630 BROCK RESERVOIR INLET NEAR CALEXICO, CA


Imperial County, California
Hydrologic Unit Code 18100204
Latitude  32°42'34.0", Longitude 115°01'28.7" NAD27
Gage datum 160 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 2013-10-01 -> 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
1 513 69 205 421 222 125 152 288 181 112 153 142
2 231 210 197 263 111 81 218 340 219 219 221 94
3 219 95 279 210 133 41 128 244 263 128 176 68
4 142 119 223 188 256 145 329 154 217 11 158 220
5 71 129 201 188 131 126 390 201 166 88 168 132
6 133 111 232 124 173 227 326 222 130 158 51 120
7 150 254 86 44 304 163 210 141 209 173 70 132
8 184 237 86 100 274 234 57 108 161 85 217 127
9 108 212 136 248 140 392 56 227 264 202 288 169
10 123 216 267 162 246 230 25 190 180 223 354 212
11 107 92 116 153 66 66 96 260 259 112 217 243
12 117 74 218 197 58 116 187 425 265 110 287 161
13 180 187 164 364 143 154 227 216 201 173 324 85
14 180 273 211 162 236 134 172 74 181 242 195 98
15 82 156 269 186 256 248 193 108 39 106 161 106
16 268 76 230 289 301 233 277 108 46 106 214 76
17 190 225 186 190 123 293 217 96 69 156 167 221
18 68 241 226 145 148 136 254 125 142 224 158 178
19 151 256 165 213 247 252 233 269 149 124 260 236
20 237 287 96 252 194 207 155 120 128 167 176 190
21 99 146 115 273 213 190 130 287 171 71 135 146
22 173 248 80 288 289 43 221 412 153 78 173 244
23 199 167 97 324 233 63 357 198 203 37 50 291
24 315 88 84 190 167 160 95 171 221 220 204 381
25 173 162 91 213 141 159 81 30 225 227 281 565
26 209 68 210 229 93 184 148 47 277 257 350 145
27 97 184 226 227 73 272 185 17 281 160 138 158
28 186 209 222 212 75 38 201 296 248 47 225 102
29 181 223 298 221 98 25 153 211 182 79 132 77
30 130   378 331 190 99 61 81 132 138 141 175
31 111   494   79   64 205   182   409