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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 level to gather shellfish

Current level



DateE. coli (CFU)
Unsafe to gather
shellfish above
14 CFU


19 Oct 21 250014
26 Oct 21 30014

2 Nov 21 19014
17 Nov 21 12014
30 Nov 21 10014
16 Dec 21 220014
13 Jan 22 5014 
28 Jan 22 21014
4 Feb 22 39814
11 Feb 22  54014
19 Feb 22  38014
25 Feb 22 46014
4 Mar 22  29014
11 Mar 22  28514
18 Mar 22 12014
25 Mar 22 58014
1 Apr 22  18714
8 Apr 22 36014
15 Apr 22 24514
22 Apr 22 64214
29 Apr 22 48014
6 May 22 68014
13 May 22 12014
19 May 22 75214
26 May 22 43514
2 Jun 22 30914
9 Jun 22 109214
16 Jun 22 54014
23 Jun 22 20914
30 Jun 22 22014
7 Jul 22 136014
14 Jul 22 34014
28 Jul 22120014
4 Aug 2259014

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

Pipi by CFU

Unsafe to eat
(above 2.3)

17 Aug 21 1102.3
1 Sept 21 1102.3
9 Sept 21 782.3
24 Sept 21 13002.3
29 Sept 21 1102.3
1 Oct 21 3302.3
19 Oct 21 160002.3
26 Oct 21 2302.3
2 Nov 21 13002.3
17 Nov 21 802.3
25 Nov 21 802.3
30 Nov 21 3302.3
9 Dec 21 802.3
15 Dec 21 13002.3
13 Jan 21 1402.3
28 Jan 21 1452.3
4 Feb 22 1822.3
11 Feb 22 2902.3
19 Feb 22 1222.3
25 Feb 22 1782.3
5 Mar 22 1062.3
12 Mar 22 2782.3
18 Mar 22 632.3
25 Mar 22 7222.3
1 Apr 22 2942.3
8 Apr 22 3642.3
15 Apr 22 2202.3
22 Apr 22 4362.3
29 Apr 22 2482.3
6 May 22 1072.3
13 May 22 1282.3
19 May 22 392.3
26 May 22 2592.3
2 Jun 22 5012.3
9 Jun 22 12632.3
16 Jun 22 2762.3
23 Jun 22 1842.3
30 Jun 22 592.3
7 Jul 22 4802.3
14 Jul 22 1802.3
28 Jul 2223002.3
4 Aug 2215062.3