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.
The EPA recommends a maximum (no more than) 4 ppm (parts per million) of chlorine for safe drinking water. A typical municipal water supply measured at the home faucet is typically between 0.2 and 0.5 ppm chlorine. It takes 45 minutes to destroy Giardia Protozoan (common cause of diarrhea) with 1 ppm chlorine level.