While spaying is traditionally recommended for kitties between 4 and 6 months of age, spaying as young as 8 weeks old is considered safe, according to Cat Channel.
The national drinking water standards state that the maximum residual amount of chlorine is 4 mg/L. Untill recently the USA used chlorine gas extensively for wastewater treatment. Today, the use of chlorine has been forced back.
Testing and Levels. To determine the levels of free and combined chlorine in the water, first test to determine the level of free chlorine, then test to determine the level of total chlorine. The difference between the two levels is the level of combined chlorine. To maintain adequate disinfection capability, the level of free chlorine in the water should not be below 1 part per million. In general, the free chlorine level should remain between 1.5 and 2.5 parts per million.