The Council currently monitors many waterways within Christchurch and Banks Peninsula for a range of aspects, including water quality, sediment quality and aquatic ecology.

This monitoring is undertaken for consenting purposes, and also to uphold the requirements of our policies and plans.

The Christchurch City Council monitors water quality at over fifty waterway and coastal sites within Christchurch City and Banks Peninsula monthly.

Sites are typically monitored for the following parameters:

  • dissolved copper
  • dissolved lead
  • dissolved zinc
  • Biochemical Oxygen Demand
  • conductivity
  • dissolved oxygen
  • Enterococci 
  • Escherichia coli 
  • total water hardness
  • total ammonia (ammoniacal nitrogen)
  • Nitrate Nitrogen
  • Nitrite Nitrogen
  • Nitrate-Nitrite-Nitrogen
  • Dissolved Inorganic Nitrogen
  • pH
  • Dissolved Reactive Phosphorus
  • salinity
  • Total Suspended Solids
  • water temperature
  • turbidity

The results of this monitoring are presented annually in a report that assesses differences between sites over time, and compares the results to guideline levels, to determine sites and parameters of concern. The current and past reports can be found below. 

Citywide surface water quality report cards

Citywide surface water quality reports

Targeted wet weather and dry weather monitoring

Te Roto o Wairewa – Lake Forsyth

Other monitoring reports

The Council has monitored the aquatic ecology and sediment quality of many waterways in the area for many years.

Monitoring is undertaken within waterways in Christchurch City and Banks Peninsula every year. This monitoring includes assessments of riparian and instream habitat, aquatic plants and algae, aquatic insects and fish. 

Sediment quality is monitored on a two-year basis and is typically analysed for a range of parameters.

Mana whenua values monitoring is undertaken in a different catchment on a five-yearly rotation. This monitoring is done in conjunction with Papatipu Rūnanga.

The results are presented in reports assessing the condition of the waterways and parameters of concern, based on relevant guidelines, as well as any changes over time. Monitoring reports are linked below.

More details on the Council's Environmental Monitoring Programme can be found at CSNDC Environmental Monitoring Programme V.10 [PDF, 7.6 MB].

The Council summarises the monitoring of water quality, sediment quality and ecology into annual waterway report cards, which gives a grade for each catchment from A to E. 

Waterway report cards

Five-yearly monitoring reports

Ōtākaro-Avon River:

Ōpāwaho-Heathcote River, Linwood Canal and Banks Peninsula:

Huritini-Halswell River:

Pūharakekenui-Styx River:

Ōtūkaikino River:

Annual monitoring reports

Cashmere Stream:

Styx Mill:

Mana whenua values reports

Fish passage reports

Other monitoring reports

Council holds resource consent CRC252424 known as the Comprehensive Stormwater Network Discharge Consent (CSNDC) authorising the majority of the Stormwater Discharges Council is responsible for and these are annual reports required by Condition 61.

Details on the consent can be found at Environment Canterbury(external link).

2024