New Zealand Gazette – 2017 – No. 79

Page 12

✨ Freshwater Management Policy Amendment



NEW ZEALAND GAZETTE, No. 79 — 9 AUGUST 2017

<5% <20% ≤130 ≤540 For at least half the time, the estimated risk is
A
(Blue) The predicted average infection risk is 1%*
5–10% 20–30% ≤130 ≤1000 For at least half the time, the estimated risk is
B
(Green) The predicted average infection risk is 2%*
10–20% 20–34% ≤130 ≤1200 For at least half the time, the estimated risk is
C
(Yellow) The predicted average infection risk is 3%*
20–30% >34% >130 >1200 20-30% of the time the estimated risk is ≥50 in 1000 (>5% risk)
D
(Orange) The predicted average infection risk is >3%*
>30% >50% >260 For more than 30% of the time the estimated risk is ≥50 in 1000 (>5% risk)
E
(Red) The predicted average infection risk is >7%*
  • The predicted average infection risk is the overall average infection to swimmers based on a random exposure on a random day, ignoring any possibility of not swimming during high flows or when a surveillance advisory is in place (assuming that the E. coli concentration follows a lognormal distribution). Actual risk will generally be less if a person does not swim during high flows.

  1. Attribute state should be determined by using a minimum of 60 samples over a maximum of 5 years, collected on a regular basis regardless of weather and flow conditions. However, where a sample has been missed due to adverse weather or error, attribute state may be determined using samples over a longer timeframe.

  2. Attribute state must be determined by satisfying all numeric attribute states.

  3. Replace the Cyanobacteria – Planktonic attribute table with:

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)

Attribute State Numeric Attribute State Narrative Attribute State
A (Blue) ≤0.5 mm³/L biovolume equivalent for the combined total of all cyanobacteria Risk exposure from cyanobacteria is no different to that in natural conditions (from any contact with fresh water).


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Online Sources for this page:

Gazette.govt.nz — PDF NZ Gazette 2017, No 79




✨ LLM interpretation of page content

🏛️ National Policy Statement for Freshwater Management Amendment Order 2017 (continued from previous page)

🏛️ Governance & Central Administration
Freshwater Management, Resource Management Act, Environmental Policy, Treaty of Waitangi, Te Mana o te Wai, Policy Amendments, Water Quality, Monitoring Methods, Regional Council Responsibilities