- 2013 Wastewater overflow information for Christchurch [PDF, 114 KB]
- CRC131405 Wastewater overflows information - unavoidable overflows as a result of earthquake-repair work [PDF, 568 KB] July 2013
A wastewater overflow is when wastewater flows out from the pipes or manholes from where it is usually contained into a stream, river or the sea. This is not normal and preventing this from occurring is a high priority for the Council.
Wastewater overflow details are listed below. Information will be updated as soon as possible, and once discharge has ceased.
Pollution may take up to two days to completely clear after the discharge has ceased.
|Discharge began||Discharge ceased||Overflow location||Waterway affected||Cause|
|18/5/2021 12pm||18/5/2021 12.30pm||Stark Bros/ Charlotte Jane Quay||Lyttelton Harbour||Sudden intense rainwater inflow|
|16/5/2021 11.15am||16/5/2021 12pm||7 Scarborough Road, Sumner||Sumner Beach - Clock Tower End||Blocked Sewer|
|14/5/2021 9.45am||14/5/2021 12.30pm||20 Marine Drive, Diamond Harbour||Lyttelton Harbour||Blocked Sewer|
|23/3/2021 10am||23/3/2021 1pm||170 Moncks Spur Road||Glenstrae Stream, potentially on to Estuary at McCormacks Bay||Blocked sewer|
|22/3/2021 8.30am||22/3/2021 8.40am||Number 5 Wharf in Lyttelton Port||Lyttelton Harbour||Blocked sewer|
|23/1/2021 10.45am||23/1/2021 Midday||Cnr Pratt St and New Brighton Road||Avon River||Air valve failure|
|6/1/2021 9.30am||6/1/2021 2pm||89 Beach Road, Akaroa||Aylmers Stream, Akaroa||Blocked sewer|
|Overflow location||Waterway affected||Possible cause|
|Lyttelton Wastewater Treatment Plant Outfall||Lyttelton Harbour||
Intermittent overloading of the reticulation during rainfall. Possible cause is cross-connection between stormwater and wastewater. A project is ongoing to reduce inflow and infiltration in the Lyttelton reticulation.
All overflow incidents will be recorded in the table above.