✨ Freshwater Quality Standards
2016
NEW ZEALAND GAZETTE, No. 71 4 JULY 2014
| Value | Human health for recreation |
|---|---|
| Freshwater Body Type | Lakes and lake fed rivers |
| Attribute | Cyanobacteria - Planktonic |
| Attribute Unit | Biovolume - mm³/L (cubic millimetres per litre) OR Cell Count - cells/mL (cells per millilitre) |
| Attribute State | Numeric Attribute State | Narrative Attribute State |
|---|---|---|
| **80th percentile*** | ||
| A | ≤0.5 mm³/L biovolume equivalent for the combined total of all cyanobacteria OR ≤500 cells/mL of total cyanobacteria | Risk exposure from cyanobacteria is no different to that in natural conditions (from any contact with fresh water). |
| B | N/A | |
| C | >0.5 and ≤1.8 mm³/L biovolume equivalent of potentially toxic cyanobacteria OR >0.5 and ≤10 mm³/L total biovolume of all cyanobacteria | Low risk of health effects from exposure to cyanobacteria (from any contact with fresh water). |
| National Bottom Line | 1.8 mm³/L Biovolume equivalent of potentially toxic cyanobacteria OR 10 mm³/L total biovolume of all cyanobacteria | |
| D | Biovolume equivalent of >1.8 mm³/L of potentially toxic cyanobacteria OR >10 mm³/L total biovolume of all cyanobacteria | Potential health risks (e.g., respiratory, irritation and allergy symptoms) exist from exposure to cyanobacteria (from any contact with fresh water). |
- The 80th percentile must be calculated using a minimum of 12 samples collected over 3 years. 30 samples collected over 3 years is recommended.
Next Page →
NZ Gazette 2014, No 71
✨ LLM interpretation of page content
🏛️
Freshwater Management Standards for Lakes and Rivers
(continued from previous page)
🏛️ Governance & Central AdministrationWater Quality, Cyanobacteria, Lakes, Rivers, Human Health, Environmental Standards, Biovolume, Cell Count