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USGS Surface-Water 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 -> 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
1 401 75 209 414 136 62 166 232 199 123 128 154
2 199 228 201 281 110 57 239 349 243 243 190 102
3 224 103 284 226 159 44 140 268 274 141 101 73
4 154 127 226 204 280 159 360 169 185 12 173 239
5 76 138 193 204 129 138 363 211 155 96 184 112
6 144 120 236 105 194 247 211 206 140 144 55 108
7 159 276 62 36 306 133 162 155 232 168 72 134
8 189 258 66 109 238 164 61 118 178 83 212 135
9 110 231 134 271 152 262 61 249 293 189 306 184
10 134 235 291 176 293 248 26 208 194 244 385 231
11 116 97 127 167 59 73 105 258 242 122 229 256
12 122 79 226 214 59 113 206 454 245 109 238 146
13 196 203 144 366 167 162 249 236 204 190 286 64
14 196 287 229 155 271 144 188 81 200 265 186 100
15 88 169 293 202 300 259 212 112 43 110 164 113
16 292 82 251 294 322 252 294 91 49 70 232 82
17 207 245 202 174 107 321 151 47 59 64 175 240
18 73 263 246 127 138 149 172 96 95 92 172 193
19 160 278 179 142 291 277 177 278 66 116 284 245
20 258 312 104 268 231 227 153 131 61 183 192 177
21 79 142 124 298 253 208 141 309 188 76 146 156
22 176 240 87 314 334 47 241 436 169 82 187 218
23 146 170 106 353 264 69 392 203 225 33 52 273
24 309 92 90 207 117 176 104 168 241 241 157 388
25 187 163 98 232 94 166 87 33 225 249 282 506
26 170 73 228 248 74 202 125 52 260 282 377 157
27 81 159 244 209 61 299 174 18 291 175 137 172
28 162 209 197 216 79 42 219 270 274 50 150 110
29 168 223 246 215 97 27 168 206 201 85 123 83
30 135   348 272 182 108 67 89 147 152 153 190
31 120   480   92   55 225   156   410