Lake Roto Kohatu

Christchurch, New Zealand
Managed by Pulse Energy

Photo by: Dylan Neild

Photo by Victor Paul
This is a small lake just to the northwest of Christchurch city centre, and is part of the Sawyers Arms Reserve. There are boating facilities and a modest beach here; the neighbouring lumber yards give the area outside the reserve an industrial feel. The lake itself started off as a gravel pit, and has since been modified for park and recreational purposes.

WATER QUALITY
  • Passed water quality tests 60-95% of the time
  • Historical Status
  • This status is based on the latest sample, taken on . Pulse Energy updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on at
For water quality icon legend, click:   
MONITORING FREQUENCY

Lake Roto Kohatu is sampled weekly from January 1st to March 31st

SOURCE INFORMATION

Canterbury Regional Council monitors water quality at popular swimming spots throughout the Canterbury region during summer. Water samples are collected weekly from around 100 recreational swimming sites from mid-November to February/March. LAWA assigns each site a grade, which is based on the last three years of monitoring data from the site.

Freshwater sites are tested for E.coli levels and toxic algae blooms. Beaches with elevated levels of bacteria are tested more regularly.

The council issues an AMBER alert if a single sample level of E.coli are greater than 260 E. coli/100 mL of water. Signs will also be posted at beaches and until water levels return to a safe level.

Pulse Energy updates Swim Guide for the latest water quality information daily, Monday - Friday during the swimming season. Data in Swim Guide is sourced from LAWA’s “Can I Swim Here” program.
Visit LAWA’s factsheet on recreational monitoring in NZ here. https://www.lawa.org.nz/learn/factsheets/what-do-the-swim-icons-mean/

A beach has a GREEN current status when no single sample is greater than 260 E. coli/100 mL and has a rank of GREEN.

A beach has a RED current status in Swim Guide when samples exceed the water quality criteria of 260 E. coli/100 mL.

A beach is marked Grey in Swim Guide when there is no current or reliable monitoring information available.

A swim site is also marked RED if cyanobacteria (toxic algae) levels exceed 15,000 cells/ml in single sample OR more than 1.8mm³/litre.

Swimming is not recommended within 48 hours after a heavy rainfall or around stormwater outfalls and at stream mouths.

Water quality updates are also available on the CRC’s facebook page: https://www.facebook.com/canterburyrecwater?v=wall

WATER QUALITY GRAPH

Lake Roto Kohatu

Christchurch, New Zealand
Managed by Pulse Energy

WATER QUALITY
  • Passed water quality tests 60-95% of the time
  • Historical Status
  • This status is based on the latest sample, taken on . Pulse Energy updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on at
For water quality icon legend, click:   
Photo by: Dylan Neild

Photo by Victor Paul
This is a small lake just to the northwest of Christchurch city centre, and is part of the Sawyers Arms Reserve. There are boating facilities and a modest beach here; the neighbouring lumber yards give the area outside the reserve an industrial feel. The lake itself started off as a gravel pit, and has since been modified for park and recreational purposes.

MONITORING FREQUENCY

Lake Roto Kohatu is sampled weekly from January 1st to March 31st

SOURCE INFORMATION

Canterbury Regional Council monitors water quality at popular swimming spots throughout the Canterbury region during summer. Water samples are collected weekly from around 100 recreational swimming sites from mid-November to February/March. LAWA assigns each site a grade, which is based on the last three years of monitoring data from the site.

Freshwater sites are tested for E.coli levels and toxic algae blooms. Beaches with elevated levels of bacteria are tested more regularly.

The council issues an AMBER alert if a single sample level of E.coli are greater than 260 E. coli/100 mL of water. Signs will also be posted at beaches and until water levels return to a safe level.

Pulse Energy updates Swim Guide for the latest water quality information daily, Monday - Friday during the swimming season. Data in Swim Guide is sourced from LAWA’s “Can I Swim Here” program.
Visit LAWA’s factsheet on recreational monitoring in NZ here. https://www.lawa.org.nz/learn/factsheets/what-do-the-swim-icons-mean/

A beach has a GREEN current status when no single sample is greater than 260 E. coli/100 mL and has a rank of GREEN.

A beach has a RED current status in Swim Guide when samples exceed the water quality criteria of 260 E. coli/100 mL.

A beach is marked Grey in Swim Guide when there is no current or reliable monitoring information available.

A swim site is also marked RED if cyanobacteria (toxic algae) levels exceed 15,000 cells/ml in single sample OR more than 1.8mm³/litre.

Swimming is not recommended within 48 hours after a heavy rainfall or around stormwater outfalls and at stream mouths.

Water quality updates are also available on the CRC’s facebook page: https://www.facebook.com/canterburyrecwater?v=wall

WATER QUALITY GRAPH



Swim Guide
is supported by
* The RBC Foundation

Swim Guide shares the best information we have at the moment you ask for it. Always obey signs at the beach or advisories from official government agencies. Stay alert and check for other swimming hazards such as dangerous currents and tides. Please report your pollution concerns so Affiliates can help keep other beach-goers safe.

Swim Guide, "Swim Drink Fish icons," and associated trademarks are owned by SWIM DRINK FISH CANADA.| See Legal.

© SWIM DRINK FISH CANADA, 2011 - 2018