The tomatoes developed by UF are listed here in this document: http://edis.ifas.ufl.edu/pdffiles/AG/AG21300.pdf. They grow great here, they just don't taste great. Some tasty hybrids do well here - just not growing in unamended soil in the ground.
Chloramine, on the other hand, is a combination of chlorine and ammonia. While chlorine dissipates and evaporates into the air relatively quickly, chloramine is more stable and will last longer in the water system. The goal is to provide increased protection from bacterial contamination.
Chloramines are a type of combined chlorine that form in water and then off gas into the air above the water. Most city, county, and state health departments limit the amount of combined chlorine in the water to 0.4 ppm or less. Chloramines can build up in the water, which means they can build up in the air if there is not enough fresh air surrounding pools and other places people swim in chlorinated water .