Service Levels

Main Line Overflow Rate

Service Level Definition

Measures the level of sewer overflows originating within the District's system per 100 miles of sewer main lines in any calendar month. This service level involves the number of sewage discharges from the District's main line system, regardless of the volume or whether the sewage enters a waterway. It takes into consideration the fact that a larger system, similarly managed, will experience more overflows than a smaller one.

Service Level Target:

• Calendar year 2008 = 1.03 per 10,000 connections (15% less than 2007 yearly average)
• Calendar year 2009 = 0.88 per 10,000 connections (15% less than 2008 target)
• Calendar year 2010 = 0.79 per 10,000 connections (10% less than 2009 target)
• Calendar year 2011 = 0.71 per 10,000 connections (10% less than 2010 target)
• Calendar year 2012 = 0.64 per 10,000 connections (10% less than 2011 target)