Fountain Drinks taste bleachy?

Hey guys, been living in Houston a few years and one thing I noticed early on were the fountain drinks at not only McDonald's but most places usually taste a little funky since I moved here. Not sure but I guess I'd describe it as a bleachy taste.

I've just been dealing with it and some times it actually tastes close to fine but today I was at McDonald's and the bleach smell hit me like a truck when I started filling my cup lol. We tried it and decided to throw it out.

Don't remember ever experiencing this in NY. Has anyone else noticed/felt this way?