SWIM in HoTWater

  Today’s reading jumped to 2159 (Poor) HoTWater’s Fluidion Alert 1 reading from the same sample was 1847 (Poor). 

  For some reason the incubator reset its target temperature back to the default of 37.5. Noticed in time. 

  HoTWater’s Fluidion Alert 1 reading from the same sample was 223 (Excellent). 

  It may have appeared that nothing has been happening for a while but I have been doing further tests in the background to iron out some procedural errors.  9/April/2026 we have a result of 133 cfu/100ml for Basmore Lane.

Royal Mail delivered the R-Cards and the incubator today so I will be looking for the best way to test one of them.  I suspect this will be side by side with the HoTWater team in Henley so that I have some sort of a reference. 

 The following photo is of a R-Card of unknown origin. It is included for demonstration purposes only. Each blue dot indicates the presence of E.coli in a 1 ml sample      row 1 = 1      row 2 = 12      row 3 = 49      row 4 = 43      row 5 = 45      row 6 = 13 total = 163 Because the accepted unit of measurement is colony forming units of E.coli per 100 ml sample, we multiply 163 x 100 giving 16300 cfu/100ml  In practice we will be examining 3 cards for each test and recording the mean/average of the 3 cards. Because 16300 is greater than 900 the Environment Agency would classify this sample as "poor", and advise against swimming. Me too ( I hope samples from the Thames are not a polluted as this ).