✨ Freshwater Management Standards
NEW ZEALAND GAZETTE, No. 71
4 JULY 2014
| Value | Ecosystem health |
|---|---|
| Freshwater Body Type | Lakes |
| Attribute | Total Phosphorus (Trophic state) |
| Attribute Unit | mg/m³ (milligrams per cubic metre) |
| Attribute State | Numeric Attribute State | Narrative Attribute State |
|---|---|---|
| Annual Median | ||
| A | ≤10 | Lake ecological communities are healthy and resilient, similar to natural reference conditions. |
| B | >10 and ≤20 | Lake ecological communities are slightly impacted by additional algal and plant growth arising from nutrients levels that are elevated above natural reference conditions. |
| C | >20 and ≤50 | Lake ecological communities are moderately impacted by additional algal and plant growth arising from nutrients levels that are elevated well above natural reference conditions. |
| National Bottom Line | 50 | |
| D | >50 | Lake ecological communities have undergone or are at high risk of a regime shift to a persistent, degraded state, due to impacts of elevated nutrients leading to excessive algal and/or plant growth, as well as from losing oxygen in bottom waters of deep lakes. |
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NZ Gazette 2014, No 71
✨ LLM interpretation of page content
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Freshwater Management Standards for Lakes
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🏛️ Governance & Central AdministrationLakes, Ecosystem Health, Total Phosphorus, Trophic State, Environmental Standards, Water Quality