Water quality monitoring

Hi. I'm doing a project name water quality monitoring. It is simple as it sounds but hard to get the results. I'm using Arduino Uno and 3 sensors to measure the quality of water ; pH, temperature and turbidity sensors. I got the code but the measurement is incorrect. Can anyone help me with it? I've attached the codes for each of it.

Please post the code - in tags.
Thx

Sattish98:
but the measurement is incorrect.

This may sound like a stupid question, but how do you know that?

I've attached the codes for each of it.

To what? Not to your post.