|Sample Site Description||29th Nov 2021||6th Dec 2021||13th Dec 2021||20th Dec 2021|
|Msunduzi at Caluza bridge||172300||111200||14136||77010|
|Msunduzi d/s of Kwapata||137400||114500||17329||48840|
|Msunduzi at Edendale weir bh Prison||101700||119800||24196||61310|
|Slangspruit u/s of Msunduzi confluence||1203300||378400||>24196||64400|
|Msunduzi at Camps Drift bridge||9050||56300||24196||29090|
|Msunduzi u/s of Dorpspruit confluence||4430||8600||>24196||6131|
|Dorpspruit at polo fields||4280||27500||>24196||64880|
|Townbush stream at polo fields||4830||39700||>24196||46110|
|Dorpspruit Ohrtmann Road||5040||33600||>24196||92080|
|Msunduzi u/s of Refuse Dump||4280||5100||>24196||11199|
|Msunduzi u/s of Darvill WWW||3180||6300||1371||17329|
|Msunduzi u/s of Baynespruit||2920||4100||1616||17329|
|Baynespruit at Greytown road||686700||148300||10112||19900|
|Baynespruit at Sobantu||613100||124600||547500||35000|
|Msunduzi u/s of Darvill Maturation river||48840||69700||>24196||>24196|
|Darvill final effluent||66||121||7701||2755|
|Duzi d/s of Darvill Mat river||41900|
|Msunduzi at Motorcross||27550||29200||17329||28090|
WHAT DO E. COLI NUMBERS MEAN?
DUCT’s River Water Quality Assessment Guidelines updated 27 October 2013
E. coli bacteria occur naturally within mammal digestive systems and most of them are not harmful in any way. However, because they are so common E. coli data are considered useful as a general indicator of a wide range of other potential human pathogens, and thus also of the possible presence of sewage related water quality problems. In the absence of other data, E. coli numbers are useful in allowing a general assessment of other potential water quality risks.
*Note, the only acceptable value for drinking water quality is ZERO E.coli counts per 100 mℓ. No naturally occurring surface water should be expected to have E. coli this low (even in large dams). If zero E. coli results are achieved for a natural water, contamination by disinfectants is the likely cause and this may be masking other significant potential pollutants.