Lake Roto Kohatu

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:

Report Pollution

MONITORING FREQUENCY

SOURCE INFORMATION

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

MONITORING FREQUENCY

SOURCE INFORMATION

WATER QUALITY GRAPH

Beach	Location	Water Quality
Waimakariri River at Rock Spur Christchurch, New Zealand	Christchurch, New Zealand	Historical Status
Otukaikino Creek at Swimming Hole Christchurch, New Zealand	Christchurch, New Zealand	Historical Status
Avon River Christchurch, New Zealand	Christchurch, New Zealand	Current Status
Waimakariri River at Stewarts Gully Yacht Club Christchurch, New Zealand	Christchurch, New Zealand	Current Status

Other Beaches Near This One

Beach	Location	Water Quality
Waimakariri River at Rock Spur Christchurch, New Zealand	Christchurch, New Zealand	Historical Status
Otukaikino Creek at Swimming Hole Christchurch, New Zealand	Christchurch, New Zealand	Historical Status
Avon River Christchurch, New Zealand	Christchurch, New Zealand	Current Status
Waimakariri River at Stewarts Gully Yacht Club Christchurch, New Zealand	Christchurch, New Zealand	Current Status

Swim Guide
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* 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.

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	Green means the beach’s most recent test results met relevant water quality standards.

	Red means the beach’s most recent test results failed to meet water quality standards.

	Grey means water quality information for the beach is too old (more than 7 days old) to be considered current, or that info is unavailable, or unreliable.

	Green means the beach passed water quality tests 95% of the time or more.

	Yellow means the beach passed water quality tests 60-95% of the time.

	Red means the beach failed water quality tests 40% of the time or more.

	Green means the beach has historically excellent or pristine water quality, but there is no current data.

	Red means the water at the site has water quality issues or there is an emergency.

	Grey means there is no current water quality information, the beach is under construction, there has been an event that has rendered water quality information unreliable or unavailable.