Office of the Delaware River Master

Current and Archived Data

Cannonsville Reservoir

Pepacton Reservoir

Neversink Reservoir

Summary River Data

Data presented on the Office of the Delaware River Master website are reviewed periodically to ensure accuracy. The data are considered provisional, however, until they are published in the annual report of the River Master. Data users are advised to carefully consider the provisional nature of the information before using it for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Information on the accuracy and appropriate uses of the data can be obtained by contacting the Deputy Delaware River Master.

NEW YORK DIVERSIONS

Last 30 days.

The Decree authorizes the City of New York to divert water from the Delaware River watershed. At no time during any twelve-month period, commencing June 1, shall the aggregate total quantity diverted, divided by the number of days elapsed since the preceding May 31, exceed the applicable permitted rate of diversion.

NEW JERSEY DIVERSIONS

Last 30 days.

The Decree authorizes the State of New Jersey to divert outside the Delaware River watershed. The diversion is not to exceed 100 m. g. d. as a monthly average, with the diversion on any day not to exceed 120 million gallons.

RESERVOIR OPERATION DATA

Millions of gallons -- 24 hour period, local time

Date Discharge to river Diversions to New York City water supply
Pepacton Cannonsville Neversink Pepacton Cannonsville Neversink Average
Spill Release Spill Release Spill Release Beginning Beginning Beginning 1-June-19 to date
2020-08-02 0 90 0 299 0 71 296 0 200 535
2020-08-03 0 90 0 299 0 71 301 184 199 535
2020-08-04 0 90 0 298 0 71 17 0 33 534
2020-08-05 0 90 0 299 0 71 234 147 0 534
2020-08-06 0 90 0 297 0 71 351 147 0 534
2020-08-07 0 90 0 295 0 72 396 144 0 534
2020-08-08 0 90 0 296 0 71 396 0 0 533

SEGREGATION OF FLOW, DELAWARE RIVER AT MONTAGUE AND PRECIPITATION IN UPPER DELAWARE RIVER BASIN

Discharge in cubic feet per second, local time routed to Montague. --, data not yet available.

Date Releases from NYC Reservoirs Power Releases Computed Total Precipitation (inches)
Directed Release Pepacton Cannonsville Neversink Wallenpaupack Rio Reservoir Uncontrolled Discharge Daily Cumulative
2020-08-05 0 140 463 110 1,400 1,059 26,923 29,500 0.00 0.00
2020-08-06 0 140 459 110 1,391 1,743 11,646 15,500 0.19 0.19
2020-08-07 0 138 456 111 456 1,280 5,256 8,640 0.10 0.29
2020-08-08 0 138 457 110 485 818 6,066 8,050 0.00 0.29
2020-08-09 0 -- -- -- 437 234 4,496 5,920 0.00 0.29
2020-08-10 0 -- -- -- -- 341 -- -- 0.00 0.29
2020-08-11 0 -- -- -- -- -- -- -- 0.00 0.29

Download Current Data

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Cannonsville Reservoir
Pepacton Reservoir
Neversink Reservoir
Forecast at Montague, New Jersey
Mitigation Banks

Archived Data

Weekly Reservoir and Streamflow Data Archived by Month and Year

2020 Jan Feb Mar Apr May Jun Jul
2019 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2018 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2017 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2016 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2015 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2014 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2013 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2012 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2011 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2010 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2009 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2008 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2007 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2006 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2005 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2004 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2003 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2002 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2001 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2000 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Archived OST Summary Data

2020 Jan 16 Feb 17 Mar 18 Apr 14 May 17 June 15
2019 Jan 18 Feb 13 Mar 17 Apr 17 May 16 Jun 13 Jul 14 Aug 14 Sep 16 Oct 16 Nov 17 Dec 18
2018 Jan 18 Feb 14 Mar 20 Apr 17 May 18 Jun 01 Jun 14 Jul 15 Aug 14 Sep 18 Oct 17 Nov 14
2017 Feb 02 Feb 14 Feb 27 Mar 19 Apr 17 May 02 Jun 16 Jul 17 Aug 16 Oct 23 Nov 16 Dec 18
2016 Jan 14 Feb 17 Mar 10 Apr 20 May 06 May 19 Jun 01 Jun 19 Jul 18 Aug 19 Sep 19 Oct 13 Nov 08 Nov 21
2015 Jan 14 Jan 28 Feb 16 Feb 22 Mar 08 Apr 20 May 14 Jun 01 Jun 15 Jun 22 Aug 05 Sep 14 Oct 13 Nov 13 Dec 14
2014 Jan 20 Feb 18 Mar 14 Apr 17 May 18 Jun 17 Jul 25 Aug 14 Sep 16 Oct 14 Nov 15 Nov 23 Dec 02 Dec 16
2013 Jan 16 Feb 19 Mar 15 Mar 28 Apr 02 Apr 09 Apr 15 Apr 22 Apr 29 May 03 May 09 May 13 Jun 03 Jun 19 Jun 24 Jul 16 Aug 15 Sep 16 Oct 14 Nov 15 Dec 18
2012 Jan 20 Mar 13 Apr 30 May 16 Jun 14 Jul 17 Jul 24 Aug 17 Sep 11 Sep 19 Oct 15 Nov 14 Dec 19
2011 Jun 15 Jul 13 Aug 17 Sep 14 Oct 19 Nov 14 Dec 14

Monthly Hydrologic Conditions for the Upper Delaware River Basin

2011 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov
2010 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2009 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2008 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2007 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2006 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2005 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2004 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2003 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2002 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2001 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2000 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1999 Sep Oct Nov Dec