Welcome to Jersey WaterCheck’s evaluation center — the Benchmark Hub.

The Benchmark Hub helps utility managers and state leaders dive into the factors that contribute to the need for water infrastructure investment. Here you will find the details, measures, reports, results, and data that we’ve gathered for every water and wastewater system in the state.

Scroll down to view details and data for the selected measure.

Percentage of CSO volume reduction expected with the implementation of the proposed Long Term Control Plans (state-level)

At the state level, this metric shows the expected reduction in volume (million gallons) of annual combined sewer overflows (CSOs) across all 24 permittees based on the proposed Long Term Control Plans (LTCPs). This percentage is calculated based on the sums of two values reported in all LTCPs: A) the baseline annual volume of CSOs and B) the anticipated annual volume of CSOs after LTCP implementation. The equation used is: 1 - (B/A). Given that all permittees will meet the minimum requirement of the CSO permit, which is 85% capture* (a separate calculation that factors in the wet weather flow volume at the treatment plant), this metric gives a sense of how far away the permittees are, on average, from achieving 85% capture.

Note: More information about the CSO permits and the plans for all 24 permittees that submitted Long Term Control Plans (LTCPs) in October 2020 can be found here.

*The "Presumption Approach” in US EPA’s CSO policy requires “…the capture for treatment of no less than 85 percent by volume of the combined sewage collected in the combined sewer system during precipitation events on a system-wide annual average basis.”

Data Source: CSO Long Term Control Plans

Click here see the related system-level measure.