- 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|
|4/5/2019 12.55pm||4/5/2019 5pm||2 Sandy Bay Road, Governors Bay||Lyttelton Harbour||Valve Failure|
|29/4/2019 3.30pm||29/4/2019 6pm||Diamond Harbour Wastewater Treatment Plant||Lyttelton Harbour||High rainfall|
|29/4/2019 3.24pm||29/4/2019 5.09pm||Lyttelton Wastewater Treatment Plant||Lyttelton Harbour||High rainfall|
|13/2/2019 2pm||13/2/2019 4.30pm||Diamond Harbour Wastewater Treatment Plant||Lyttelton Harbour|
|2/2/2019 7am||2/2/2019 10am||1 Main Road, Governors Bay||Lyttelton Harbour||Related to the blockage on 31 Jan|
|31/1/2019 8am||31/1/2019 4pm||1 Main Road, Governors Bay||Lyttelton Harbour||Blocked sewer|
|7/1/2019 8.23pm||7/1/2019 9.30pm||Cnr. Ferniehurst Street and Ashgrove Tce||Heathcote River||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.
Note: All overflow incidents will be recorded in the table above.