Quick Update: One more water quality session at McCurdy

On Monday, we again visited McCurdy High School to discuss water quality with Ms. Pepersack’s Biology class. We compared the Santa Cruz River and the McCurdy Acequia using our Vernier probes and the LaMotte kits. Again, we got very interesting results.

Pepersack1
We could really use another display for our Vernier sensors!
Pepersack2
A student shakes a test tube to measure phosphates.
Pepersack3
A few of our measurements.

Why are the pH and conductivity values for this ditch so high? One important fact is that the ditch is no longer running, so this water has been sitting for a while. Perhaps salt from the sidewalks runs off into this water? This is our current working theory- let us know if you have any ideas!

Happy Thanksgiving!

Christy

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