Bathing Water Data : 2019

Portobello (Central)

Sufficient
Portobello (Central)
.

Number of samples taken : 15
Date Escherichia coli
(cfu/100ml)
Intestinal enterococci
(cfu/100ml)
22 May 2019 20 10
05 Jun 2019 600 230
13 Jun 2019 8300 2000
Heavy rainfall flushed bacteria into the bathing water. Poor water quality was forecast on this date
18 Jun 2019 <10 <10
20 Jun 2019 20 <10
26 Jun 2019 10 <10
04 Jul 2019 100 20
09 Jul 2019 10 <10
17 Jul 2019 <10 <10
22 Jul 2019 40 <10
25 Jul 2019 60 60
31 Jul 2019 2000 370
The source of high bacteria levels cannot be determined at this time
07 Aug 2019 20 <10
15 Aug 2019 330 70
20 Aug 2019 470 50


Historical record

2015/16
Sufficient
2016/17
Sufficient
2017/18
Sufficient

Results explained

The annual bathing water classification is determined using statistics calculated from results taken over the previous four years. The water quality indicators we test for are the bacteria E Coli (EC) and intestinal enterococci (IE). The statistics take account of both the average value and the range of values in the four year dataset.

Single sample results above 500 EC and 200 IE are indicative that water was of low quality when the sample was taken. For inland waters the low quality boundaries are higher at 1000 EC and 400 IE.