Amanda wrote:
BTW, I don't worry bout lead problem. This house is a little over 3
years old; I have been living here 1 3/4 year.

http://www.ehow.com/how_16271_choose...iltration.html

"STEP 4: Think about getting an in-line reverse-osmosis filtering
system if your water test shows sodium, ferrous iron, nitrates, lead,
fluoride or organic contaminants. Be aware that a reverse-osmosis
system puts out a limited amount of drinking water and wastes a lot of
water (about 4 gallons of wasted water per gallon of clear water). If
your water's calcium count is high, you'll need to use a water
softener with this system (see "eHow to Eliminate Hard Water'). "

I don't want reverse-osmosis since it waste water and I doubt that I
have lead issue.

The amount of water it wastes, in terms of cost, is miniscule. If it's
really a concern, you can recover that water in a jug, and use it for
plants or something.

RO is the only type of home system that really is worthwhile. The PUR
will remove chlorine taste, but it doesn't really do much else.

You can get a countertop RO system, i.e.
"http://www.thstore.com/thstore/ProductInfo2.asp?ID=W-TGI-CT-445&GroupID=225"
but it's more expensive than a regular RO system from Costco ($140).

They do have zero waste RO systems now, though they are much more expensive.