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.

Wastewater overflow details are listed below. Information will be updated as soon as possible, and once discharge has ceased. There may be delays during busy periods.  Event Identification (ID) numbers are not consecutive, due to false alarms etc.

Pollution may take up to two days to completely clear after the discharge has ceased. 

2022 overflows

Discharge began Discharge ceased ID No. Overflow location Waterway affected Cause
25 October 1pm 25 October 2.30pm 418 Behind 25 Harbour View Terrace, Cass Bay Lyttelton Harbour / Whakaraupō Split/burst pipe 
18 October 9am  18 October 9.45am 416  24 Godley Quay, Lyttelton Lyttelton Harbour / Whakaraupō Split/burst pipe
18 October 9am 18 October 10.45am 415 Corner of Centaurus Road and Major Aitken Drive Heathcote River Blocked pipe
1 September 7.30am 2 September 12.15am 414 25 Eastern Terrace, Beckenham Heathcote River Blocked pipe

 23 August 10am

23 August 10.30am

  413 Rawhiti Street, Diamond Harbour Lyttelton Harbour / Whakaraupō  Roots blocking pipe

16 August 6am

16 August 9am

 412 Governors Bay Road Lyttelton Harbour / Whakaraupō Equipment fault - loose bolt
 4 August 7am 4 August 12.30pm 410 Akaroa Fire Station, 49 Beach Road  Akaroa Harbour High rainfall
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.