Drinking water quality (can be more than 100% and highly variable)
The proportion of the estimated resident population who receive their water from community water supplies whose drinking water complies with either the 2000 or 2005 Drinking-water standards for New Zealand relating to E. coli and Cryptosporidium.
Drinking water quality - E. coli
| Region | E. coli compliance (% of population) | |||||||
|---|---|---|---|---|---|---|---|---|
| 2001 | 2002 | 2003 | 2004 | 2005 | 2006/2007 | 2007/2008 | ||
| 1 | Northland | 63.2 | 29.3 | 61.6 | 58.4 | 27.4 | 57.4 | 60.3 |
| 2 | Auckland | 90.3 | 88.7 | 85.9 | 89.9 | 90.3 | 91.2 | 90.3 |
| 3 | Waikato | 64.4 | 27.9 | 43.7 | 48.5 | 58.3 | 64.4 | 66.5 |
| 4 | Bay of Plenty | 45.2 | 75.5 | 58.3 | 61.2 | 52.0 | 51.1 | 83.3 |
| 5 | Gisborne | 68.5 | 68.6 | 67.2 | 65.9 | 67.9 | 69.8 | 67.7 |
| 6 | Hawke's Bay | 81.8 | 81.4 | 78.8 | 82.9 | 83.3 | 79.9 | 75.4 |
| 7 | Taranaki | 56.6 | 58.1 | 77.9 | 59.4 | 77.2 | 76.5 | 76.0 |
| 8 | Manawatu-Wanganui | 54.9 | 79.3 | 79.5 | 67.1 | 80.1 | 53.0 | 85.0 |
| 9 | Wellington | 81.3 | 91.0 | 73.4 | 90.2 | 84.6 | 87.8 | 86.9 |
| 10 | Tasman | 89.4 | 97.3 | 88.9 | 43.4 | 39.8 | 43.2 | 41.9 |
| 11 | Nelson | 117.7 | 117.4 | 116.0 | 97.7 | 97.7 | 97.0 | 96.6 |
| 12 | Marlborough | 70.3 | 3.8 | 1.3 | 3.5 | 4.8 | 75.3 | 75.2 |
| 13 | West Coast | 60.9 | 57.2 | 59.0 | 34.0 | 33.3 | 35.0 | 46.9 |
| 14 | Canterbury | 14.5 | 70.5 | 73.6 | 69.8 | 76.8 | 90.8 | 90.5 |
| 15 | Otago | 6.2 | 14.8 | 25.4 | 55.3 | 67.9 | 69.0 | 69.3 |
| 16 | Southland | 4.8 | 12.6 | 68.5 | 66.4 | 70.7 | 66.5 | 77.6 |
Drinking water quality - Cryptosporidium
| Region | Cryptosporidium compliance (% of population) | |||||||
|---|---|---|---|---|---|---|---|---|
| 2001 | 2002 | 2003 | 2004 | 2005 | 2006/2007 | 2007/2008 | ||
| 1 | Northland | 12.7 | 13.8 | 1.0 | 0.9 | 3.5 | 46.8 | 48.4 |
| 2 | Auckland | 87.6 | 86.0 | 45.7 | 86.3 | 87.2 | 88.4 | 87.4 |
| 3 | Waikato | 10.3 | 39.9 | 43.0 | 42.2 | 40.3 | 34.6 | 33.5 |
| 4 | Bay of Plenty | 16.2 | 15.3 | 46.3 | 42.1 | 46.0 | 49.0 | 48.6 |
| 5 | Gisborne | 0.0 | 65.9 | 65.5 | 66.3 | 66.1 | 0.0 | 0.0 |
| 6 | Hawke's Bay | 59.1 | 78.2 | 78.6 | 51.9 | 56.0 | 78.2 | 75.2 |
| 7 | Taranaki | 0.0 | 45.3 | 46.1 | 45.7 | 50.2 | 50.5 | 50.4 |
| 8 | Manawatu-Wanganui | 40.6 | 42.2 | 49.9 | 39.6 | 59.3 | 54.2 | 56.7 |
| 9 | Wellington | 79.4 | 88.1 | 82.6 | 74.8 | 78.3 | 83.7 | 83.0 |
| 10 | Tasman | 8.7 | 8.5 | 9.1 | 31.5 | 31.2 | 4.3 | 4.3 |
| 11 | Nelson | 0.0 | 0.0 | 0.0 | 97.7 | 97.7 | 96.8 | 96.2 |
| 12 | Marlborough | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 13 | West Coast | 17.0 | 18.2 | 0.0 | 0.4 | 0.4 | 1.0 | 1.0 |
| 14 | Canterbury | 59.2 | 58.3 | 62.7 | 65.0 | 64.2 | 66.8 | 63.2 |
| 15 | Otago | 0.5 | 0.2 | 5.1 | 5.7 | 4.8 | 47.6 | 52.4 |
| 16 | Southland | 9.0 | 61.7 | 7.8 | 6.8 | 6.4 | 59.8 | 57.7 |