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Flow Information

The Authority currently has over 46 meters installed throughout its service area in order to determine the flow  contribution from each municipal member.  These meters measures at least 75% of the flow from each of our member municipalities.  Information from each flow meter is instantly available to the Authority through the Internet.  The Authority has initiated a Flow Meter Quality Control Program to insure that the data we receive from each meter is accurate.  Our Maintenance Committee reviews the flow data annually to insure it's accuracy.

The Authority has gathered a significant amount of information concerning our flows.  Here are links to some of that information.

Flow data by month by municipality .........................................................[click here]

Graph showing gallons per day per household by each flow meter (2013).[click here]

Graphs showing gallons per day per household by each flow meter (2009 to 2014).[click here]

The table below shows the amount of flows handled by CDCA in million gallons of flow per day.  Since 1984, the Authority has transported for treatment an average of 11.24 million gallons per day.           

That is 4,088,000,000 gallons during the average year!

Year Million Gallons per Day
1984 9.53
1985 7.38
1986 11.32
1987 13.00
1988 12.01
1989 14.54
1990 13.81
1991 13.67
1992 11.77
1993 14.10
1994 14.78
1995 11.83
1996 15.81
1997 11.38
1998 8.89
1999 8.89
2000 9.32
2001 9.34
2002 8.49
2003 12.44
2004 12.67
2005 10.84
2006 10.41
2007 10.33
2008 8.83
2009 10.02
2010 10.16
2011 11.27
2012 9.18
2013 10.28
2014 10.86
Average (since 1984) 11.20
Maximum  (1996) 15.81
Minimum   (1985) 7.38
 

Private Property Infiltration and Inflow

What are we talking about?

Over 85% of the Authority's budget is for the treatment of our municipal member's flows.  Unfortunately, our flows are significantly impacted by rainfall.  Rain water soaks through the ground and into the sewers through cracks or bad connections.  Each municipal member and the Authority are constantly working to find and repairs these leaks into the sewer system. 

A significant amount of extraneous flow enters the sewer system through the pipe that connects each home to the sewer in the street.  This is called a house lateral and is the property of the home owner.  These pipes are rarely inspected or repaired.  Consequently a significant number of them are in disrepair.  Rainwater and groundwater that should soak into the ground are allowed to enter the sewer system.  Once in the public sewer system, the rainwater and groundwater undergoes unneeded treatment which everyone pays for in their sewer bill.

In June of 2010, a report on private property infiltration & inflow was issued by Delcora.  The Delcora report on private property I&I is available for downloading by clicking on the link below.  (The file is 5 MB in size.)  In addition, a companion video was also produced.  The video is posted on "Youtube" and can be seen by using the link below.

Delaware County is in the process of amending their Act 537 Plan.  The effort is focusing on requiring municipalities to enact house lateral inspections at the time a property is sold.  A copy of their draft ordinance can be found by using the link below.

The Water Environment Federation (WEF) maintains a "Private Property Virtual Library" on its website. This is a growing library of case studies from private property-related programs at wastewater utilities. It is intended to be a resource for other utilities seeking information or advice about private property programs. You can find it at the link below.

Finally, the Pennsylvania Water Environment Association's Collection System Committee conducted a class called Removing Private Property I&I.  The class was held on January 24, 2013 at the Cabela's store in Hamburg, PA.  The presentations and reference materials are posted on this website and can be accessed by clicking on the link below.

As a reference for our municipal members, the National Association of Sewer Service Companies (NASSCO)  maintain a website that provides a wealth of information on lateral rehabilitation.  In addition, NASSCO maintains a training and certification program for lateral inspections.  Click here to go to their website and read about their efforts on lateral inspection and certification training.  http://nassco.org/training_edu/te_lacp.html

Delcora's Private Property Report 

Delcora's Private Property Video exit this site

Delaware County's Proposed House Lateral Ordinance

Water Environment Federation's Private Property Virtual Library  exit this site

Removing Private Property Infiltration & Inflow Class

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