Archived water quality assessments
Water quality at Semaphore Jetty is assessed as being in good,
moderate or poor condition by interpreting water chemistry and
algal data. >> More
Water quality classification for October 2005 toMarch 2006
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Indicator
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NC
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NA
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Good
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Moderate
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NA
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NA
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Good
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NA
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NA
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Good
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NA
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NA
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Moderate
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Moderate
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NA
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Poor
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NA
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NA
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Good
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NA
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Good
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NA
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Good
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NA
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Notes NA = not applicable. NC
= not classified due to laboratory failure.
Chlorophyll (a) was classified as poor and oxidised nitrogen
classified as moderate at Semaphore. This is most likely due a
combination of effluent from the Bolivar WWTP, heavy industries
in the Port River and urban stormwater adding nutrients, which
promote algal growth.
Heavy metals were classified as good, which is an improvement
from the last period where they were classified as poor. This
is likely to be due to less runoff from urban areas due to the
warmer months.
Water quality classification for April to September 2005
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Indicator
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Good
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NA
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Good
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Good
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NA
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NA
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Good
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NA
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NA
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|
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Good
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NA
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NA
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|
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Good
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Good
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NA
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Poor
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NA
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NA
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|
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Poor
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NA
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Poor
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|
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NA
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Good
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NA
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Notes NA = not applicable
Chlorophyll (a) (an indicator of algae) was classified as poor
at Semaphore. This is most likely due a combination of effluent
from the Bolivar WWTP, heavy industries in the Port River and
urban stormwater promoting algal growth.
Heavy metals were classified as poor, which is most likely due
to urban runoff containing heavy metals washed off roads and galvanised
iron roofs.
This page was last modified 31-07-2007
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