20230419 09381900 1.0 TRUE CSO volume 2017 The symbology of this layer represents the total effluent volume in cubic meters (m3) deposited via a combined sewer overflow (CSO) point for each wastewater system. Please note, a value of “999999999” in the dataset indicates that the volume data is unavailable and it does not mean that a volume of 999,999,999 m3 was released. Environment and Climate Change Canada