Bathing Water Data : 2017

Portobello (West)

Poor
Portobello (West)
.

Number of samples taken : 4
Date Escherichia coli
(cfu/100ml)
Intestinal enterococci
(cfu/100ml)
17 May 2017 <10 <10
06 Jun 2017 8000 4200
This high result is considered to be due to torrential rainfall in the area prior to the sample being taken. Our electronic signage system correctly forecast poor bathing water quality on this day.
12 Jun 2017 10 30
19 Jun 2017 40 30


Historical record

2015/16
Poor
2016/17
Poor

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.