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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 03049500 Allegheny River at Natrona, PA


Allegheny County, Pennsylvania
Hydrologic Unit Code 05010009
Latitude  40°36'55", Longitude  79°43'07" NAD27
Drainage area 11,410  square miles
Gage datum 735.8 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 1938-10-01 -> 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 29,100 25,400 33,500 39,200 25,100 16,900 12,400 8,550 6,560 8,940 13,700 23,000
2 28,600 24,500 33,800 38,400 24,300 16,700 12,400 7,970 6,780 9,290 14,100 23,300
3 28,400 24,700 34,500 40,900 23,800 16,600 12,100 7,990 6,960 9,600 14,300 22,700
4 29,200 24,500 35,300 41,700 23,400 16,400 11,300 7,850 7,060 9,690 14,700 23,400
5 29,900 24,300 36,700 42,700 22,800 16,600 10,400 8,010 6,780 9,580 14,700 24,300
6 29,400 24,400 37,800 43,800 22,300 16,100 10,200 7,800 6,450 9,250 15,200 24,100
7 28,900 24,400 38,400 41,800 22,100 15,100 9,750 7,560 6,480 9,020 15,000 24,200
8 27,600 24,100 38,000 40,600 22,100 14,600 9,430 7,660 6,350 9,020 14,700 25,000
9 26,500 23,100 39,000 39,900 22,800 14,700 9,280 7,630 7,030 8,930 14,500 25,000
10 25,100 22,400 39,100 39,500 23,200 14,700 8,960 7,620 8,240 8,920 14,300 25,100
11 23,900 24,100 38,200 37,800 23,600 13,800 8,740 7,620 7,760 8,690 15,200 25,300
12 24,100 24,400 37,800 38,100 24,300 13,700 8,850 7,720 7,400 8,500 15,900 25,800
13 25,500 24,700 38,400 38,000 26,600 14,000 9,250 7,840 7,390 8,420 16,400 26,600
14 24,600 26,100 38,200 35,800 26,400 14,700 9,280 7,730 7,520 8,610 16,100 27,100
15 24,100 26,300 38,500 35,100 25,300 15,200 9,000 8,240 7,700 9,080 16,000 27,000
16 23,900 26,800 38,400 34,200 25,000 15,100 9,280 7,670 7,770 10,500 16,200 25,600
17 23,300 27,300 38,300 33,800 24,800 15,000 9,250 7,110 7,880 10,400 17,900 24,600
18 23,300 28,200 38,600 33,100 24,800 14,900 9,230 6,850 9,420 10,600 18,300 24,700
19 24,400 28,300 36,600 32,300 24,200 15,000 9,140 6,530 9,080 10,900 18,900 24,500
20 24,900 28,600 36,700 32,100 23,700 15,100 10,100 6,760 8,740 11,100 19,500 23,200
21 24,400 29,400 36,700 30,900 23,200 14,700 9,670 6,710 8,620 11,000 19,200 23,300
22 24,600 29,700 38,000 29,600 23,100 14,400 10,000 6,740 8,480 10,800 19,100 24,200
23 24,500 31,400 38,500 28,100 23,100 14,800 10,300 6,570 8,720 10,500 19,200 23,700
24 25,100 32,000 37,500 27,400 22,400 14,300 9,950 6,400 8,330 10,400 19,300 24,200
25 26,000 32,600 36,800 27,200 21,200 13,600 9,630 6,350 8,080 10,700 19,500 25,100
26 26,900 32,900 36,400 27,600 20,700 14,000 8,980 6,180 7,950 11,100 20,000 25,600
27 27,300 32,300 36,700 27,500 20,200 12,800 8,670 5,980 8,030 11,400 21,100 25,700
28 27,300 33,000 36,600 26,500 19,700 12,900 8,590 5,860 8,280 12,100 21,800 26,200
29 26,700 32,200 37,400 26,500 19,300 13,000 8,350 6,180 8,720 12,800 22,300 27,400
30 25,800   37,400 26,400 18,000 12,400 8,050 6,400 9,050 13,400 22,600 29,200
31 26,700   38,900   17,400   8,280 6,460   13,500   30,200