Type of
Indicator
Indicator/Definition
TEMPERATURE –
How hot or cold the
water is
Physical
Healthy/Unhealthy Levels
Correct temperature to support the
organisms/ecosystem.
Minimum: _____________
Maximum: _____________
TURBIDITY –
A measure of how
________________ the
water is due to “stuff” in
it
Drinking Water: ____________NTU
Salt Water: ________________NTU
Fresh Water: _______________NTU
pH –
A measure of how
________________ or
________________ the
water is
DISSOLVED OXYGEN –
Drinking Water: ______________
Salt Water: ________________
Fresh Water: _______________
Correct amount of dissolved oxygen
Chemical
Amount of oxygen
__________ dissolved in
the water
NUTRIENTS Substances that are
usually good, but can
become __________ if
they are not the right
level
BIO-INDICATORS –
Macro-invertebrates
Biological that live in the water
and are sensitive to
________________
= ____________________________
_________ ppm is optimal
Correct amount of nitrates,
phosphates, sunlight, minerals, salt =
____________________________
Nitrates = _____________________
Phosphates = __________________
Lots of bio-indicators =
Little/no bio-indicators =
Causes of Unhealthy Levels
Effects of Unhealthy Levels
pH MINI LAB:
pH Levels
0 – 6 = _________________
Lemon Juice
Windex
Tap Water
Your Mouth
pH Value
7 = ____________________
8 – 14 = _______________
Acid, Base or Neutral?
EUTROPHICATION FLOW CHART:
____________________________  algal bloom (pond scum)  _____________________ below surface  photosynthesis stops
 decomposers & other organisms use up oxygen  _________________________________________
HARDNESS REVIEW:
What are you testing for when you are testing the hardness of water? _____________________________________________
 “Hard” Water =
 “Soft” Water =
“GAME CHANGERS”
Mercury
Which type of indicator? _____________________________
 Natural toxic element  Usually affects people through
 Causes kidney damage &
Coliform
Which type of indicator? ____________________________
 Bacteria commonly found in
 Some forms are harmless, but can indicate the
presence of _______________________________.