The filter is new, but the top portion has been ripped open.

From the manufacturer:

Rated capacity:
200 Gallons (757 L) or replace every six months, whichever comes first.

Reduces the following:
Chlorine Taste and Odor
Particulates (class I)
Lead
Cysts
Turbidity
Astrazine (Herbicide)
2,4-D (Herbicide)
Toxaphene (Pesticide)
Mercury
Lindane
Alachlor
O-Dichlorobenzene
Chlorobenzene
Styrene
Tetrachloroethylene