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.
Currently, chromium is regulated in drinking water as total chromium and the California drinking water standard of 50 parts per billion measures the amount of both toxic (hexavalent) and non- or less-toxic (trivalent) chromium in the water.