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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
Date | E. coli (CFU) | Unsafe to gather |
|---|---|---|
19 Oct 21 | 2500 | 14 |
26 Oct 21 | 300 | 14 |
2 Nov 21 | 190 | 14 |
17 Nov 21 | 120 | 14 |
30 Nov 21 | 100 | 14 |
16 Dec 21 | 2200 | 14 |
13 Jan 22 | 50 | 14 |
28 Jan 22 | 210 | 14 |
4 Feb 22 | 398 | 14 |
11 Feb 22 | 540 | 14 |
19 Feb 22 | 380 | 14 |
25 Feb 22 | 460 | 14 |
4 Mar 22 | 290 | 14 |
11 Mar 22 | 285 | 14 |
18 Mar 22 | 120 | 14 |
25 Mar 22 | 580 | 14 |
1 Apr 22 | 187 | 14 |
8 Apr 22 | 360 | 14 |
15 Apr 22 | 245 | 14 |
22 Apr 22 | 642 | 14 |
29 Apr 22 | 480 | 14 |
6 May 22 | 680 | 14 |
13 May 22 | 120 | 14 |
19 May 22 | 752 | 14 |
26 May 22 | 435 | 14 |
2 Jun 22 | 309 | 14 |
9 Jun 22 | 1092 | 14 |
16 Jun 22 | 540 | 14 |
23 Jun 22 | 209 | 14 |
30 Jun 22 | 220 | 14 |
7 Jul 22 | 1360 | 14 |
14 Jul 22 | 340 | 14 |
28 Jul 22 | 1200 | 14 |
4 Aug 22 | 590 | 14 |
11 Aug 22 | 672 | 14 |
18 Aug 22 | 95 | 14 |
24 Aug 22 | 590 | 14 |
1 Sept 22 | 275 | 14 |
8 Sept 22 | 621 | 14 |
22 Sept 22 | 390 | 14 |
28 Sept 22 | 523 | 14 |
6 Oct 22 | 1103 | 14 |
13 Oct 22 | 340 | 14 |
20 Oct 22 | 175 | 14 |
27 Oct 22 | 270 | 14 |
6 Nov 22 | 421 | 14 |
10 Nov 22 | 1100 | 14 |
17 Nov 22 | 692 | 14 |
25 Nov 22 | 1250 | 14 |
30 Nov 22 | 221 | 14 |
8 Dec 22 | 92 | 14 |
15 Dec 22 | 328 | 14 |
29 Dec 22 | 695 | 14 |
5 Jan 22 | 393 | 14 |
19 Jan 22 | 312 | 14 |
1 Feb 23 | 828 | 14 |
15 Feb 23 | 1194 | 14 |
1 Mar 23 | 1833 | 14 |
18 Mar 23 | 1355 | 14 |
29 Mar 23 | 722 | 14 |
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 |
|---|---|---|
17 Aug 21 | 110 | 2.3 |
1 Sept 21 | 110 | 2.3 |
9 Sept 21 | 78 | 2.3 |
24 Sept 21 | 1300 | 2.3 |
29 Sept 21 | 110 | 2.3 |
1 Oct 21 | 330 | 2.3 |
19 Oct 21 | 16000 | 2.3 |
26 Oct 21 | 230 | 2.3 |
2 Nov 21 | 1300 | 2.3 |
17 Nov 21 | 80 | 2.3 |
25 Nov 21 | 80 | 2.3 |
30 Nov 21 | 330 | 2.3 |
9 Dec 21 | 80 | 2.3 |
15 Dec 21 | 1300 | 2.3 |
13 Jan 21 | 140 | 2.3 |
28 Jan 21 | 145 | 2.3 |
4 Feb 22 | 182 | 2.3 |
11 Feb 22 | 290 | 2.3 |
19 Feb 22 | 122 | 2.3 |
25 Feb 22 | 178 | 2.3 |
5 Mar 22 | 106 | 2.3 |
12 Mar 22 | 278 | 2.3 |
18 Mar 22 | 63 | 2.3 |
25 Mar 22 | 722 | 2.3 |
1 Apr 22 | 294 | 2.3 |
8 Apr 22 | 364 | 2.3 |
15 Apr 22 | 220 | 2.3 |
22 Apr 22 | 436 | 2.3 |
29 Apr 22 | 248 | 2.3 |
6 May 22 | 107 | 2.3 |
13 May 22 | 128 | 2.3 |
19 May 22 | 39 | 2.3 |
26 May 22 | 259 | 2.3 |
2 Jun 22 | 501 | 2.3 |
9 Jun 22 | 1263 | 2.3 |
16 Jun 22 | 276 | 2.3 |
23 Jun 22 | 184 | 2.3 |
30 Jun 22 | 59 | 2.3 |
7 Jul 22 | 480 | 2.3 |
14 Jul 22 | 180 | 2.3 |
28 Jul 22 | 2300 | 2.3 |
4 Aug 22 | 1506 | 2.3 |
11 Aug 22 | 327 | 2.3 |
18 Aug 22 | 95 | 2.3 |
24 Aug 22 | 492 | 2.3 |
1 Sept 22 | 320 | 2.3 |
8 Sept 22 | 408 | 2.3 |
22 Sept 22 | 790 | 2.3 |
28 Sept 22 | 225 | 2.3 |
6 Oct 22 | 78 | 2.3 |
13 Oct 22 | 212 | 2.3 |
20 Oct 22 | 205 | 2.3 |
27 Oct 22 | 122 | 2.3 |
6 Nov 22 | 98 | 2.3 |
10 Nov 22 | 240 | 2.3 |
17 Nov 22 | 692 | 2.3 |
25 Nov 22 | 1250 | 2.3 |
30 Nov 22 | 97 | 2.3 |
8 Dec 22 | 295 | 2.3 |
15 Dec 22 | 75 | 2.3 |
22 Dec 22 | 210 | 2.3 |
29 Dec 22 | 359 | 2.3 |
05 Jan 23 | 199 | 2.3 |
19 Jan 23 | 82 | 2.3 |
1 Feb 23 | 250 | 2.3 |
15 Feb 23 | 193 | 2.3 |
1 Mar 23 | 285 | 2.3 |
18 Mar 23 | 152 | 2.3 |
29 Mar 23 | 35 | 2.3 |
