Toxic Algae Monitoring
| Phormidium cyanobacteria % cover at river monitoring sites | ||||
|---|---|---|---|---|
| Date | Maitai at Avon Terrace | Maitai at Dennes Hole | Maitai at Campground | Wakapuaka at Hira Reserve |
| 2019/20 | ||||
| 24 Jan | 2 | 0 | 0 | 1.25 |
| 13 Jan | 15.75 | 16.75 | 20.25 | 5 |
| 7 Jan | 16.5 | 20 | 21.5 | 1.5 |
| 3 Jan | 10 | 5 | 15 | 2 |
| 31 Dec | 12 | 25.5 | 28 | 5 |
| 24 Dec | 9.5 | 16.75 | 13.75 | 2 |
| 11 Dec | 16.25 | 13.25 | 14.75 | 0 |
| 6 Dec | 2.55 | 5.75 | 5 | 0 |
| 29 Nov | 21.25 | 7.75 | 21.25 | 0.25 |
| 19 Nov | 10.25 | 7.75 | 11.25 | 0 |
| 19 Mar | 0 | 0 | 0 | 0 |
| 12 Mar | 0 | 0 | 0 | 0 |
| 27 Feb | 0 | 0 | 0 | 0 |
| 15 Feb | 0 | 0 | 0 | 0 |
| 8 Feb | 0 | 0 | 0 | 0 |
| 1 Feb | 0 | 0 | 0 | 0 |
| 25 Jan | 0 | 0 | 0 | 0 |
| 18 Jan | 0 | 0 | 0 | 0 |
| 15 Jan | 0 | 0 | 0 | 0 |
| 3 Jan | 0 | 0 | 0 | 0 |
| 2018 | ||||
| 27 Dec | 0 | 0 | 0 | 0 |
| 20 Dec | 0 | 0 | 0 | 0 |
| 17 Dec | 6.6 | 1.75 | 1.75 | 3.25 |
| 3 Apr | 7.75 | 1.25 | 4.75 | 1 |
| 21 Mar | 10.25 | 0.5 | 2.5 | 3 |
| 14 Mar | 7.75 | 0.5 | 1.5 | 2.5 |
| 7 Mar | 3.25 | 0.25 | 1 | 1.75 |
| 28 Feb | 3 | 0 | 0 | 0.25 |
| 22 Feb | Not surveyed due to high flows | |||
| 15 Feb | 0 | 0 | 0 | 0 |
| 7 Feb | 13.25 | 0 | 0 | 2 |
| 31 Jan | 9 | 0 | 0 | 1.75 |
| 24 Jan | 0.75 | 0 | 0.5 | 0.25 |
| 17 Jan | 0.25 | 0 | 0 | 0.75 |
| 10 Jan | 0.25 | 0 | 0 | 0.25 |
| 3 Jan | 0.5 | 0 | 0 | 1.25 |
| 2017 | ||||
| 27 Dec | 0 | 0 | 1.75[dm] | 1[dm] |
| 20 Dec | 2.25[dm] | 0.75[dm] | 9.5[dm] | 2[dm] |
| 13 Dec | 7[dm] | 2[dm] | 13.5[dm] | 3.75[dm] |
| 6 Dec | 15 [dm] | 2.75 [dm] | 18.75 [dm] | 2.25 [dm] |
| 29 Nov | 25 | 4.75 | 17.8 | 3.5 |
| 22 Nov | 31 | 6 | 14.25 | 4.25 |
| 15 Nov | 28 | 9 | 15.5 | 3.8 |
| 10 Nov | 18 | 14 | 10.25 | 2.75 |
| 29 Mar | 10.75 | 0 | 0 | 2.75 |
| 22 Mar | 7.75 | 0 | 0 | 1.5 |
| 16 Mar | 3.75 | 0 | 0 | 2 |
| 9 Mar | 5.5 | 0 | 0 | 1.5 |
| 1 Mar | 5.25 | 0.5 | 0 | 1.75 |
| 23 Feb | 7.75 | 0.75 | 0 | 2.75 |
| 15 Feb | 8.25 | 1.25 | 0 | 2 |
| 9 Feb | 7.5 | 1.25 | 0 | 2 |
| 1 Feb | 4.25 | 2 | 0.5 | 1 |
| 26 Jan | 0.5 | 2 | 0 | 0 |
| 18 Jan | 15 | 15 | 0 | 0 |
| 11 Jan | 16 | 14 | 3.5 | 0.5 |
| 4 Jan | 16 | 17.5 | 3 | 0 |
| 2016 | ||||
| 28 Dec | 14 | 12.5 | 2 | 0 |
| 21 Dec | 23.5 | 21 | 12.5 | 0 |
| 15 Dec | 21.5 | 17 | 8.5 | 0 |
| 6 Dec | 23.5 | 17 | 11 | 0 |
| 30 Nov | 21 | 12.5 | 6.3 | 0 |
| 21 Nov | 3 | 6 | 3 | 0 |
| 16 Nov | Not surveyed due to high flows | |||
| 9 Nov | 28 | 22 | 3 | 2 |
| 18 Oct | 12 | [High Flows] | 4 | 0 |
[dm] : detaching mats