River flow data
We record water levels at 155 river and lake sites in Canterbury, from the Clarence River/Waiau Toa in the north to the Waitaki River in the south. We measure river flow at 132 of these sites and this information is combined with water level data to produce continuous flow records. We report this alongside data from 19 other sites recorded by partner agencies such as the National Institute of Water and Atmospheric Research and Christchurch City Council.
Find out about irrigation restrictions for a specific area, which may relate to a consent you hold.
Please note that this river flow information is raw data only and may contain inaccuracies and therefore cannot be relied upon for determining flow restrictions.
Please note Times below are in NZ Standard Time. During Daylight Saving Time please add one hour.
River flow data is available for developers to use in their applications.
Visit our Developer Data Portal to find out more and sign up to use this service.
How to receive text messages in 3 simple steps
1. Look up the shortcode for the river you want (see list below)
2. Text "RV" (for river), a space and then the shortcode to phone number ECAN (3226). For example, send RV CLAR to ECAN for information on the Clarence River. Remember to include the space between "RV" and the shortcode.
3. You will receive the information in a text message.
|Northern region rivers||Shortcode|
Hurunui at Mandamus
Hurunui at SH 1
|Ashley at Lees Valley||RV ASHL|
|Ashley Gorge||RV ASHG|
|Ashley at Rangiora||RV ASHR|
|Waimakariri at Esk||RV WAIME|
|Waimakariri at Gorge||RV WAIMG|
|Waimakariri at Old Highway Bridge||RV WAIMO|
|Cust Main Drain||RV CUST|
|Selwyn at Whitecliffs||RV SELWW|
|Selwyn at Ridgens Road||RV SELWR|
|Selwyn at Coes Ford||RV SELWC|
|Southern region rivers||Shortcode|
Ashburton at SH 1
|North Opuha||RV OPUHN|
|South Opuha||RV OPUHS|
|Opihi at Rockwood||RV OPIHR|
|Opihi at Saleyards||RV OPIHS|
|Opihi at SH 1||RV OPIHI|