A wastewater overflow is when sewage flows out from the pipes or manholes where it is usually contained and into the stormwater system, which then drains 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. 

2022 overflows

Discharge began Discharge ceased Overflow location Waterway affected Cause
1 August 2pm 2 August 7.30am Corner of Hawke Street and Keyes Road Avon River High rainfall
31 July 9.55am 1 August 12am Corner of Thames Street and Malvern Street Avon River High rainfall
31 July 9.30am 1 August 11am Corner of Eastern Terrace and Sandwich Road Heathcote River High rainfall
31 July 9.25am 1 August 1.30am Corner of Avonside Drive and Retreat Road Avon River High rainfall
31 July 12.30am 31 July 12.30am Pump Station 1/21 - Off Paparoa Street Avon River High rainfall
27 July 12.40am  28 July 10am  401 Linwood Avenue Ihutai Estuary High rainfall
26 July 10.10pm 28 July 10am Corner of Richardson Terrace and Mackenzie Avenue Heathcote River High rainfall
26 July 6.55pm 28 July 10am Corner of Eastern Terrace and Sandwich Road Heathcote River High rainfall
26 July 6.30pm 28 July 10am Corner of Tennyson Street and Eastern Terrace Heathcote River High rainfall
26 July 3.15pm 28 July 10am Corner of Pamela Street and Chelsea Street Ihutai Estuary High rainfall
26 July 8.30am 1 August 12am 61 St Andrews Square Avon River High rainfall
26 July 7.40am 28 July 10am Corner of Waltham Road and Eastern Terrace Heathcote River High rainfall
26 July 7.30am 28 July 10am Corner of Fisher Avenue and Eastern Terrace Heathcote River High rainfall
26 July 7.25am 1 August 12am 134 Cashmere Road Heathcote River High rainfall
26 July 6.50am 28 July 10am 286 Halswell Road Heathcote River High rainfall
26 July 5.30am 28 July 10am Akaroa Recreation Ground Akaroa Harbour High rainfall
26 July 4.50am 1 July 12am Pump Station 1/21 - Paparoa Street, Papanui Avon River High rainfall
26 July 4.50am 28 July 10am Corner of Pamela Street and Chelsea Street Ihutai Estuary High rainfall
26 July 12.10am 28 July 10am 70 Bexley Road Avon River High rainfall
22 July 1.45am 22 July 12.55pm 35E Holbrook Way Heathcote River High rainfall
21 July 5.35pm 24 July 2.55am Corner of Pamela Street and Chelsea Street Ihutai Estuary High rainfall
21 July 1.40pm 22 July 12am 35E Holbrook Way Heathcote River High rainfall
21 July 10am 21 July 12am 61 Saint Andrews  Square Avon River High rainfall
21 July 9am 22 July 12am Pump Station 17/1 - 26 Lewishham Park Avon River High rainfall
21 July 8.35am 21 July 11.40am Pump Station 0630/1 - Diamond Harbour Lyttelton Harbour High rainfall
21 July 8am 22 July 12am 88 Grants Road Avon River High rainfall
21 July 6.40am 22 July 12am Pump Station 1/21 - Off Paparoa Street Avon River High rainfall
21 July 6.35am 22 July 12am 286 Halswell Road Heathcote River High rainfall
21 July 4.55am 22 July 12am Corner of Fisher Ave and Eastern Terrace Heathcote River High rainfall
21 July 4.55am 22 July 12am Pump Station 20/2 Waltham Avon River High rainfall
13 July 2.30am 13 July 2.30am Corner of Pamela Street and Chelsea Street Ihutai Estuary High rainfall
 12 July 8.15pm 12 July 11pm Corner of Richardson Terrace and Mackenzie Ave Heathcote River High rainfall
12 July 5.55pm 13 July 1.55am  St Andrews Square Avon River High rainfall
12 July 4.20pm 12 July 5.40pm 286 Halswell Road Heathcote River High rainfall
12 July 2.45pm 12 July 7.35pm Corner of Waltham Road and Eastern Terrace Heathcote River High rainfall
12 July 1.10pm 12 July 10.10pm Corner of Sandwich Road and Eastern Terrace Heathcote River High rainfall
12 July 1.10pm 12 July 9pm Corner of Tennyson Street and Eastern Terrace Heathcote River High rainfall
12 July 1pm 12 July 10.15pm Corner of Fisher Ave and Eastern Terrace Heathcote River High rainfall
12 July 12.45pm 13 July 1.25am Corner of Avonside Drive and Retreat Road Avon River High rainfall
12 July 12.20pm 13 July 1.40am Paparoa Street Avon River High rainfall
12 July 11.30am 12 July 9.05pm Recreation Ground Akaroa Harbour High rainfall
1 July 8am 1 July 9.30am 6 Marine Drive Lyttelton Harbour Sewer blocked by roots
27 May 10am 27 May 8pm Swans Road Avon River Blocked sewer
25 May 1pm 25 May 1.10pm 2 Simeon Quay Lyttelton Harbour Pump failure
13 May 1pm 13 May 5.05pm 5 Jed Lane Dudley Creek Private blocked sewer
13 May 8am 13 May 10.30am 25 Eastern Terrace Heathcote Blocked sewer
6 April 9.30am 6 April 12.05pm 118 Rue Jolie, Akaroa Akaroa Harbour  
13 February 6.35am 13 February 7.15am Corner of Eastern Terrace and Sandwich Road Heathcote River High rainfall
13 February 2.20pm 13 February 2.25pm Corner of Eastern Terrace and Tennyson Street Heathcote River High rainfall
13 February 2.30pm 13 February 2.35pm Corner of Anzac Drive and Carisbrook Street Avon River High rainfall
12 February 7.00pm 13 February 8.30pm Dudley Creek Diversion at Rutland Reserve Avon River High rainfall
13 February 12.35am 13 February 9.25pm Linwood Canal at the corner of Linwood Avenue and Hargood Street Ihutai Estuary High rainfall
12 February 10.15pm 13 February 4.45pm Tay Street Drain at the corner of Thames Street and Malvern Street Avon River High rainfall
12 February 9.40pm 13 February 10.40pm Carton Mill Corner Avon River High rainfall
28 February 4.07pm 28 February 5.00pm Taylors Mistake Beach Pegasus Bay Damaged pipe
4 January 4.00pm 4 January 5.40pm 5 Jetty Road, Governors Bay Lyttelton Harbour Blocked sewer

 

Ongoing issues under investigation

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.