Closures

1999 – 2018

Figure 12 illustrates the distribution of different causes of pipeline blockages which resulted in ocean, harbor and bay water closures from 1999-2018. The infiltration of roots (31%) and deposition of grease (25%) into sewer pipes accounted for slightly more than half (56%) of the pipeline blockages that resulted in ocean, harbor and bay water closures in Orange County for the 20-year period from 1999 – 2018. Other causes of pipeline blockages that resulted in water closures were debris (15%), miscellaneous (6%) and vandalism (1%). The remaining 22% of pipeline blockages that caused ocean, harbor and bay water closures were not able to be determined (unknown).

Types of Pipeline Blockages Causing Closures 1999 – 2018 Figure 12.