neutral i think.What should it be
Didn't seem to have much in it, I tested the ppm as well and believe is was under 20. Still, who knows what that is. lol. I didn't use it because it was low ph and I'd have to adjust anyway, so I stuck with my RO. If anything I will recycle it into the humidifier sometimes, but usually just keep a 5 gal bucket nearby that I dump into.I hear of people using the water
But to me, seems like lots of air quality crap would be in it
But that's me