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USGS Surface-Water Daily Statistics for the Nation

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 01097000 ASSABET RIVER AT MAYNARD, MA


Middlesex County, Massachusetts
Hydrologic Unit Code 01070005
Latitude  42°25'55", Longitude  71°27'01" NAD27
Drainage area 116  square miles
Contributing drainage area 116  square miles
Gage datum 146 feet above NAVD88
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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 1940-10-01 -> 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
1 215 240 288 490 309 193 107 70 65 94 135 194
2 221 228 287 509 299 200 107 69 69 88 134 197
3 222 238 306 514 287 205 105 67 71 82 138 198
4 224 260 323 509 284 204 102 62 70 82 143 194
5 223 266 328 501 278 198 100 59 62 85 145 191
6 217 254 330 498 266 201 96 57 58 90 147 193
7 213 244 343 481 257 208 90 55 63 93 146 201
8 208 243 357 455 249 215 88 60 65 93 145 208
9 211 233 362 426 246 210 94 66 68 95 148 208
10 223 221 365 402 248 199 101 70 69 92 154 211
11 233 222 362 390 254 186 99 70 74 90 158 216
12 228 230 364 377 255 171 94 69 81 89 161 230
13 226 227 367 366 253 164 91 68 85 89 161 234
14 224 229 383 365 254 172 89 68 78 90 163 231
15 223 234 411 358 251 174 84 67 72 97 167 236
16 219 241 418 365 246 162 81 66 66 108 165 233
17 212 248 420 392 247 155 78 65 64 118 167 231
18 204 252 435 395 244 150 78 67 69 115 164 237
19 205 259 450 377 238 142 77 81 81 110 158 246
20 208 256 446 360 232 134 76 112 85 111 151 237
21 212 251 437 340 226 128 77 106 80 122 152 226
22 219 256 449 329 218 122 77 86 76 127 158 223
23 229 265 478 331 206 119 81 74 73 122 170 225
24 242 271 478 336 195 118 91 69 73 118 178 229
25 276 292 462 333 193 117 93 65 74 117 179 233
26 313 314 452 324 198 115 85 61 79 124 187 235
27 320 311 449 319 201 114 77 57 81 126 194 234
28 325 300 448 315 196 113 75 58 80 126 192 230
29 303 298 446 313 187 113 74 61 86 128 190 222
30 274   460 312 185 110 74 63 94 136 193 218
31 253   480   187   70 65   137   217