GUI – Problem with a product specification / user-generated data point (range may vary)

This can be a bit difficult to explain, but hope you can understand me.

I have this problem right now. Let's say I have a website that contains a database on sports drinks / water containing product information.

I have the option for users to measure themselves the PH level at home and submit it to the database. Now, I have a problem, is what happens if there are several submissions at the end of the PH spectrum, a bid of 2 and a bid of 9.

My 2 questions are:

  1. When users search and filter our database by PH submission, what value should I assign to this product with a variable range?

  2. I do not understand how I could display this too

I hope it makes sense!