| Company | Plant Location | MPa | Start Date | Expiry Date | Certificate |
|---|---|---|---|---|---|
| Allied Concrete | Avondale | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF |
| Bombay | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Penrose | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Silverdale | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Waipapa | 50 | 01 Feb 2023 | 31 Oct 2023 | Download PDF | |
| Whangarei | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Atlas Concrete Limited | Kumeu | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF |
| Maungaturoto | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Panmure | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Ruakaka | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Silverdale | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Takapuna | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Warkworth | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Wiri | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Bridgeman Concrete Limited | City West | - | - | - | - |
| East Tamaki No. 1 | - | - | - | - | |
| East Tamaki No. 2 | - | - | - | - | |
| Papakura | - | - | - | - | |
| Counties Ready Mix Limited | Drury No. 1 | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF |
| Drury No. 2 | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Duracrete Products Limited | Kauri | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF |
| Firth Industries | Albany | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF |
| Auckland Airport | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Dargaville | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Hamer Street | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Henderson | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Leonard Road | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Mangawhai | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Manukau | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Marsden | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Matakana | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Pukekohe | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Puketona | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Silverdale | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Waiheke Island | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Wellsford | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Whangarei | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| FNR Concrete Limited | Kaitaia | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF |
| Formstress Precast Limited | Waiuku | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF |
| Mangonui Haulage Limited | Mangonui | 50 | 01 Feb 2023 | 31 Oct 2023 | Download PDF |
| Waipapa (Satellite) | - | - | - | - | |
| New Zealand TT Concrete Limited | Mangere | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF |
| Stevenson Concrete Limited | Drury | 50 | 01 Feb 2023 | 30 Apr 2023 | Download PDF |
| East Tamaki | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Penrose | 50 | 01 Nov 2022 | 31 Jan 2023 | Download PDF | |
| Ranui | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Silverdale | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF | |
| Stresscrete Northern Limited | Papakura No. 2 | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF |
| Virgin Concrete Limited | Kamo | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF |
| Kamo No. 2 (Satellite) | 50 | 01 Nov 2022 | 31 Oct 2023 | Download PDF |
