Tap water seems to give me a headache?

Kain6th
I was at the library yesterday. I usually take a thermos with water in it with me everywhere, but this time I didn't have it with me. I got thirsty so I drank water from their drinking fountain, Within maybe a minute or two I got a headache, and I also recall other times where I drank tap water I also got a headache.

This happen to anyone else? I know they put chlorine in the water supply to fight bacteria and stuff so maybe that's it?
Updates
+1 y
They always seem to say that tap water is better than bottled water. I just don't see how.
Updates
+1 y
I do have a filter on my sink fosseit and home that's where I drink most of my water
Tap water seems to give me a headache?
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