Lesson 4 - Water Quality and Treatment 

I love this class

very helpful, thank you!

Good afternoon Dr please help me with the different categories of water parameters that is physical,chemical and biological

Very helpful. Thanks

Thank you

Good job well done. Thank you.

I have a question! If a water treatment plant ! Has nice numbers. But. When you pour hotwater into a milk container ! And the water starts to fizzle ! After it sitting still for 20 seconds.!!