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Shellfish gathering waters

For marine/salt water influenced waters there is currently no legislated safe swimming limit. Councils vary in their monitoring methodologies between faecal coliforms and Enterococci. Because E. coli is one of 4-5 bacteria that make up the faecal coliform group, Wai Kōkopu monitors E. coli at marine/salt water influenced sites.

Our reasoning for using this method is that E. coli monitoring, in addition to the Regional Council’s monitoring scheme, may allow for a better understanding of the sources of faecal pollution and public health risks. (Microbiological Water Quality Guidelines (MfE, 2003)).

Our safety limits for shellfish flesh and shellfish gathering waters are based on those set out in the Regulated Control Scheme - Bivalve Molluscan Shellfish for Human Consumption (2021).

Safe to gather shellfish

Current level


Date
(oldest to
newest)
E. coli
(CFU)
Unsafe to collect shellfish 
(above 14 CFU)
9 Jun 22 1649 14
16 Jun 22 780 14
23 Jun 22 542 14
30 Jun 22 350 14
7 Jul 22 1090 14
14 Jul 22 520 14
28 Jul 22178014
4 Aug 22191014

Shellfish

To be considered safe shellfish must contain less than 230 E. coli CFU/100 g (or 2.3 E. coli CFU/g) and the surrounding waters less than 14 E. coli MPN/100 ml.

Safe level to eat shellfish

Current level

Date
(oldest to
newest)
Pipi by CFU

Unsafe to eat
(above 2.3)


9 Jun 22 15112.3

16 Jun 22 3092.3
23 Jun 22 2742.3
30 Jun 22 1022.3
7 Jul 22 3092.3
14 Jul 22 1632.3
28 Jul 2231202.3
4 Aug 2216802.3