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USGS Surface-Water Daily Statistics for Pennsylvania

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[!] Over the next year, the USGS Pennsylvania Water Science Center will be updating the geodetic vertical elevation (gage datum) for many locations. Click HERE for additional information including a current list of streamgages with upcoming datum changes. This update in gage datum does not affect the location of the streamgage, nor the observed local gage height or discharge recorded at the streamgage.


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 01475510 Darby Creek near Darby, PA


Delaware County, Pennsylvania
Hydrologic Unit Code 02040202
Latitude  39°55'44", Longitude  75°16'22" NAD27
Drainage area 37.40  square miles
Gage datum 18.1 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 2018-10-01 -> 2022-09-30)

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
1 146 50 142 85 92 45 79 29 303 26 108 87
2 149 51 122 71 58 44 81 32 186 28 51 94
3 72 69 92 67 62 124 52 30 47 25 40 56
4 76 130 125 65 79 106 92 862 59 24 37 52
5 98 70 80 64 133 120 52 65 36 106 35 103
6 64 77 78 64 92 77 153 54 31 28 34 53
7 59 104 78 61 60 47 106 322 31 25 33 53
8 61 62 66 95 76 86 45 92 30 26 36 46
9 67 52 65 62 75 53 53 45 34 23 31 94
10 59 54 143 70 54 65 318 43 36 24 31 75
11 52 77 77 100 52 99 187 42 47 23 69 58
12 54 92 67 105 150 52 90 65 30 79 118 51
13 53 100 77 262 144 140 49 46 30 32 48 47
14 51 61 64 85 75 91 40 81 26 28 40 101
15 49 65 63 99 58 118 38 100 30 27 41 60
16 58 160 67 70 55 68 40 48 31 125 42 110
17 151 81 58 64 52 56 87 39 24 59 34 141
18 56 76 95 64 51 48 133 34 24 28 34 62
19 60 64 141 61 49 42 47 216 23 26 47 51
20 164 63 66 112 48 292 35 40 23 34 45 54
21 61 92 123 69 47 69 34 38 23 31 44 192
22 52 73 163 59 75 62 59 76 22 51 44 86
23 49 69 120 59 83 46 141 75 176 46 57 63
24 170 111 245 129 57 42 51 48 39 27 152 112
25 219 91 110 88 45 38 37 33 26 34 178 302
26 77 73 84 109 60 42 33 30 30 107 124 71
27 61 124 72 80 56 36 31 31 29 128 68 58
28 56 180 188 60 82 34 29 94 45 40 53 161
29 55 39 122 70 152 34 29 43 45 177 48 73
30 51   80 93 109 35 28 32 67 163 191 92
31 49   91   55   38 29   137   84