No |
Data Item |
Comment |
Unit |
81a |
Total volume of wastewater collected |
Volume of wastewater collected through the sewer system or by tanker. |
Million m3/year |
|
|
Where it cannot be measured, estimates should be made based on water use & infiltration from the ground (which should be included). |
|
81b |
Total volume of wastewater collected – residential |
Volume of wastewater collected from residential connections through the sewer system or by tanker |
Million m3/year |
|
|
Where it cannot be measured, estimates should be made based on water use & infiltration from the ground (which should be included). |
|
81c |
Total volume of wastewater collected – industrial & commercial |
Volume of wastewater collected from industrial and commercial connections through the sewer system or by tanker |
Million m3/year |
|
|
Where it cannot be measured, estimates should be made based on water use & infiltration from the ground (which should be included). |
|
81d |
Volume of wastewater that is treated to primary level |
Primary treatment is settlement that removes a significant proportion of solid matter. Screens are not primary treatment. |
‘Million m3/year |
81e |
Volume of wastewater that is treated to at least secondary level |
Secondary treatment is generally biological, and removes oxygen demand amongst other contaminants. |
Million m3/year |