How do I remove white space from my web pages on that shows up on mobile

The website is responsive and works fine on desktop but when it is on any mobile device, it shows white spaces to the right side of the page. What im trying to do is keep the site static so it doesnt scroll horizontally. I”ve tried overflow-x:hidden to delete the scroll but the space is still there.

http://ynbservices.com/ <———–Site that needs help with.

http://houston-plumbingservices.com/ <————-What site should look like after done.

I tried it both on android and ios and both have white space on right side.

URL: http://ynbservices.com/