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Palmerston North City Council

Stormwater Detention & Retention Requirements

Manawatu Region

Source Documents

These are the council documents used to build the PNCC calculator. If a link is broken, the document may have moved on the council website.

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Stormwater Bylaw 2022
PDF Primary Source

Calculation Methodology

Design event: 10-year (10% AEP)

Method: Stormwater Bylaw 2022

Site-specific design required per the Stormwater Bylaw 2022. Contact PNCC for specific requirements applicable to your development.

Design Requirements

  • Stormwater Bylaw 2022 compliance
  • Site-specific design required

Submission

Required Documents

  • Stormwater design report
  • Engineering plans
  • Building/resource consent

Contact

Phone(06) 356 8199
RegionManawatu
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Last verified: April 2026 · NZ Detention Tank Calculator