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USGS 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 01477000 Chester Creek near Chester, PA


Delaware County, Pennsylvania
Hydrologic Unit Code 02040202
Latitude  39°52'08", Longitude  75°24'31" NAD27
Drainage area 61.1  square miles
Gage datum 23.41 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 1931-10-01 -> 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
1 115 94 117 154 130 91 66 87 58 97 67 94
2 116 109 134 170 101 101 63 57 68 65 62 86
3 125 129 122 151 108 99 73 70 65 59 78 90
4 106 112 151 141 108 93 60 95 67 50 70 88
5 98 110 140 151 110 83 84 59 58 56 68 98
6 101 109 144 146 107 77 71 55 84 52 64 95
7 99 126 146 145 114 91 69 86 61 48 87 95
8 98 113 123 135 113 81 65 80 48 61 91 96
9 134 87 128 133 106 82 87 70 50 57 67 101
10 110 94 134 147 103 85 69 71 54 68 76 89
11 93 105 149 121 104 86 70 56 59 66 70 125
12 103 115 138 130 108 101 77 61 97 55 85 111
13 87 128 157 149 114 109 107 98 127 45 91 103
14 101 111 162 125 104 85 83 67 100 48 71 119
15 98 117 148 148 95 79 71 49 75 55 69 94
16 88 115 124 177 116 68 65 50 114 54 75 116
17 86 108 128 136 105 73 61 62 67 57 82 112
18 110 107 131 112 101 75 62 75 71 55 65 119
19 125 119 146 119 105 83 59 93 61 90 68 83
20 111 114 147 124 93 105 57 57 65 67 78 84
21 112 113 169 106 97 91 90 57 71 60 74 137
22 94 125 187 107 97 99 65 70 66 58 86 93
23 99 130 161 111 98 73 82 85 63 60 78 98
24 123 147 152 114 105 71 78 56 61 62 71 97
25 145 144 130 116 93 67 74 55 57 64 133 116
26 146 143 129 126 111 64 62 49 64 61 100 115
27 110 117 137 122 91 101 70 60 80 81 93 98
28 125 122 154 120 89 88 85 119 74 90 105 106
29 98 112 149 107 99 79 64 52 84 101 104 100
30 97   139 127 97 68 57 50 88 86 101 104
31 92   148   85   58 50   63   94