Reduce aresnic level in artesian well water

I have an 500 foot deep artesian well. in 1993 the arsenic level was
11 ppb which was well under the EPA guideline of 50 ppb. We recently
had it tested and it is now 19 ppb above the new 10 ppb EPA
guideline. Will the Doulton ACBTC-AF50-12 model be the best fit
for my house? We have 4 bathrooms. If this unit were installed what
would you estimate it would reduce my aresnic level to. Would it
bring it down below th 10PPB guideline?

It would reduce the arsenic to none detectable level. Normally on such a low level of arsenic we recommend point-of-use under-sink or counter-top filters to treat just the drinking and cooking water.

Which under-sink model would you recommend for my house?
I only need to treat for arsenic. Everything else test outs OK

IP200UC+. The reason I recommend dual housing filter is that the ceramic candle in the last housing will slow down the flow rate to about 1/2 GPM max. giving the water enough contact time with the media or, IP100 any model you control the flow rate to 1/3 - 1/2 GPM with the filter shut-off ball valve (supplied w/install kit). If choosing IP100 in the shopping cart text area state that you want A-5 candle instead the default candle.