>>4805453M has quite a selection and is a us company as far as i know (if you are american)
otherwise look/search for "under-sink water filters" they are often grouped with sanitation and pool stuff.
>>480550 gravity filters work quite well they just need time, the thing is charcoal work with chemistry, over the surface area of the charcoal and react to bind the chemicals. so they inhibit the flow less then for example a ceramic pore filter.
but it kinda depends on what amount of water you want. if its just for you to drink and make tea, and a bit of cooking. then a pitcher filter might be enough.
>http://www.amazon.com/Brita-10-Cup-Everyday-Filter-Pitcher/dp/B004GNGID0/ref=sr_1_1?ie=UTF8&qid=1426620659&sr=8-1&keywords=Water+Filtration+Pitchersthis might also a good (cheap ~$20) way to test if the result is satisfactory before you invest more.