Methanol question ?

At what point is racing methanol considered to contaminated with water to start to negatively affect performance ? In other words ... What would be the no-go number on a hydrometer ?

 

Had bad alcohol years ago, would start hard and seemed off 20% on power.
Seemed like weak ignition problem.
Didn't measure specific gravity , should have tho.
Dumped it out and it was cloudy, so if it isn't perfectly clear, dump it!
Ran fine after that.

 

Put some in a Mason jar and shake it if it is cloudy it has water in it

 

I see that on the Moon Shiner show, too. I thought that was just a "proof" thing.