Today Year 4 conducted our anual water testing to check the health of our estuary. We learnt about how human actions threaten our water ways such as oil from cars, plastic litter, concrete run off and detergent.
We can help by making sure only rain goes down the outside drain because they lead straight to the sea.
Kathryn from Watercare brought water from our local stormwater outflow. We used special equipment to measure turbidity (how clear it is), PH (how acidic, nuetral or alkaline it is), nitrate (chemicals from things like fertilisers), & oxygen.
Next we observed carefully to see if the water contained any macro invertebrates.
We discovered that the water was clear & nuetral.
The nitrate test showed a small amount of pollution.
There were some bugs, but none that can't survive with trace pollution.
Sadly there was lots of litter.
Next year we are going to think about what actions we can take to protect our local wai.
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