Water Quality

In preparation to the Hamburg Wasser World Triathlon the water quality of the swim course is regularly monitored by the independent institute of hygiene and environment and has to be accordingly to the official specifications of the ITU.

Until the event weekend the measurements will be regularly published on this website. All measurements are due to be published two days after the water was tested. The water temperature is taken at three locations at the Binnenalster where the temperature is constantly measured. The water temperature is taken every 10 minutes and the average figure as well as the maximum and minimum figure will be published.

Current water measurements:

Water temperature

date of measurment

measuring points
Ø

ITU - Reference Values

27.07.2021

23,0

-

25.08.2021

18,3

-

 

 

 

 

Faecal coliforms (E.coli) [in 100ml]

Date of measurment

Ka20

BI 10

BI 20

BI 30 AU 19

ITU - Reference Values

27.07.2021 108 15 30 127 30

 500 [1/100 ml]

25.08.2021 30 61 <15 179 15

 500 [1/100 ml]

 

         

 

 

Intestinal Enterococci  [in 100ml]

Date of measurment

Ka20

BI 10

BI 20

BI 30 AU 19

ITU - Reference Values

27.07.2021 <15 <15 <15 <15 <15

 200 [1/100 ml]

25.08.2021 <15 <15 <15 <15 <15

200 [1/100 ml]

 

         

 

 

pH-Figure

Date of measurment

Ka20

BI 10

BI 20

BI 30 AU 19

ITU - Reference Values

27.07.2021 7,5 7,6 7,7 7,7 7,8

 6-9

25.08.2021
 

7,6 7,7 7,6 7,6 7,7  6-9

 

         

 

 

Blue Algae[in μg/l]

Date of measurement

Ka20

BI 10

BI 20

BI 30 AU 19

ITU - Reference Values

14.08.2020 0,6 0,957 1,35 1,97 1,65

50 μg/l


25.08.2021
 
2,86 4,10 1,95 1,22 2,20 50 μg/l

 

         

 

 

 

What is measured and why?

  • Faecal coliforms and intestinal enterococci are found in the intestines of humans and animals and are usually harmless. They serve as an indicator of contamination of faecal origin. By demonstrating an increased number of these bacteria, the presence of pathogens, which may also occur in the intestines, can not be excluded with sufficient certainty. If none of these faecal indicators are found in the Water, one can assume that there are no harmful bacteria.
  • The pH figure is an indicator for the water quality as long as the figures are in the range of 6 to 9. If the pH figure is outside this range, reddening of the skin may occur to humans.
  • A massive prevalence of algae and especially of cyanobacteria is not only an aesthetic problem. Allergic reactions and other health problems can occur to persons with sensitive skin but symptoms usually decrease after a short time. The chlorophyll of cyanobacteria is measured. From 100 micrograms per liter (ug / l) there is a strong cyanobacteria infection.