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Taranaki region

Groundwater Zone: Taranaki Volcanics

The volcanics comprise a chain of four volcanic centres aligned in a north-west-southeast orientation (Taranaki Maunga - Fanthams Peak, Pouakai, Kaitake, and Sugar Loaf Islands-Paritutu).

Each volcano consists of a core of andesite rock surrounded by an extensive apron of volcaniclastic deposits of laharic debris, ash and tephra. Volumetrically, lahar deposits dominate the volcanics succession. The volcanic succession overlies the Tertiary sedimentary formations and the Marine Terraces in part. The volcanic succession ranges in thickness from approximately 210 metres in Okato and Egmont Village areas, 150 metres at Kapuni, and 65 metres in the Stratford/Eltham area. Aquifers occur in lahar and fluvial deposits. Hundreds of shallow wells and bores draw from unconfined aquifers in the volcanics with yields in the range 0.5-2.5 litres per second. Higher yielding confined aquifers are reported from volcanics aquifers in the Kaitake Ranges (19 l/s), New Plymouth (10 l/s), Okato (20 l/s), and at Kapuni (8l/s).


There are numerous permitted takes (less than 50 cubic metres per day) occurring across the volcanics, providing water for stock and general farm use as well as domestic supply. The generally low yields from the aquifer mean that it cannot sustain high water demand activities such as pasture irrigation, although some higher yielding bores do exisit. There are only 15 consented groundwater takes from the volcanics which exceed 50 cubic metres per day in volume. Monitoring by the Council indicates groundwater levels within the volcanics are not being affected by abstraction pressure, but respond to seasonal variations in recharge volumes.

Water Use
Groundwater in this zone

Regional councils collect information about how much water is available and manage resource consents for those wishing to take water from groundwater supplies. Use the buttons below to view regional information on: how much water is available, where it comes from and how its used.


Groundwater available: {{waterSource.availableToAllocate}} Irrigation
Town supply
  • Groundwater in this zone
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    Groundwater in this zone

    Accurately estimating the total amount of water available in a groundwater management zone is not currently possible. Regional Councils are working with the Ministry for the Environment on the best way to calculate this figure. We will include these figures on LAWA when they become available. In the meantime, for more information about a particular groundwater management zone, contact your regional council.

    Total allocated volume includes consented use only and no allowance has been made for 'permitted' use volumes.

  • Water consents: How much water is consented and used?

    Groundwater available to consent

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    Consented water in this groundwater zone

    Use the tables below to look at how much water is available compared with how much is actually consented within this water management zone. Click the plus to expand subzones where available

    Comparing consents and use
    Amount available to consent In this groundwater management zone:
    {{}} {{}}
    available to consent
    Amount consented
    measured and non measured
    Amount used (measured)
    Amount Units Consented or used as a percentage of available
    Total available to consent {{}} {{}} {{}}
    Total consented {{}} {{}} {{}} {{}}
    Total consented and measured {{}} {{}} {{}} {{}}
    Total measured amount used {{}} {{}} {{}}
    Total measured volume used {{}} {{}}

    The table above shows the amount of water that is available for use compared to the amount that has been consented. The �Total Consented� and �Total Consented and Measured� fields are based on percentages of the �Total available to Consent� field. If this field is not populated no data will be displayed. Some consents require actual use to be monitored and this is presented as 'Total measured volume Used' where available.

  • Water consents: How is consented water used?

    Consents by use in this groundwater zone

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    Consented water in this zone

    Overall annual volume for {{waterAvailable.year}}
    Relative breakdown
    Activity Percentage of total consented Total volume Number of consents
    {{item.displayText}} {{item.displayText}} - - No data available {{item.breakdownPercentage}}% {{item.totalVolume}} m3 {{item.numberOfConsents}}
    Total {{}}% {{}} m3 {{}}

    The above table shows the proportion of water consented for irrigation, industrial, stock, town supply and other. It excludes hydro electricity. In this region/management zone {{hydroUsage.totalVolume}} m3/year is consented for hydro-electricity and makes up {{hydroUsage.percentageConsented}}% of the total water volume consented for this region/management zone


Monitored sites in this Zone

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