South Otago flood response,
February 2020


Effluent management

We understand management of effluent in these circumstances is challenging. If you have any concerns please get in touch with or your industry body.


Clearing drains

With the recent heavy rains it's likely that drains may be full of silt and debris from flood waters. In this situation it is permitted to clean out the drains of silts and debris but care still needs to be taken to limit environmental impacts:

  • Take care not to deepen or widen drains. 
  • When clearing a drain make sure you consider measures to stop any sediment from entering a river or waterway: 
    • When undertaking your drain cleaning work, you should work your way from the top of the drain and work your way back towards the river.  This will allow for some settling of sediments before your final clearance work near the river.
    • You may also need to put in some sediment mitigation in the drain, for example, a hay bale at the bottom of the drain to capture silts and debris that may get mobilised from your work. 

If you have any questions about what you can do to clean out drains please call our Pollution Hotline on 0800 800 033.


Where to go for support and more information:


Water levels and flow

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