Here in my community both chlorine and chloramines (a form of ammonia) are added to the water supply. Both are highly toxic. I have a filter for both my shower and bathtub. When we shower and bathe our skin is absorbing more toxins than when we drink tap water.
If you don't have a filter you can also use Vitamin C tablets which neutralize chlorine and chloramines in a bathtub, spa or washing machine. I recommend a product called VitaBath and it contains ascorbic acid, citric acid and sodium bicarbonate.
Happy Healthy Bathing!