Chloramines, and why softener resin does not last forever here

Last reviewed: September 12, 2026

Georgetown typically uses chloramines as its disinfectant, and the city describes periodic conversions to free chlorine. Both matter if you own a water softener, and almost nobody explains why before they sell you one.

What happens to the resin

A softener works by running water through a bed of ion exchange resin. The resin is plastic beads. Disinfectants oxidize those beads over time, the bead structure breaks down, and the bed slowly loses capacity and starts to channel.

You do not get a warning light. You get a unit that quietly stops doing as much as it used to, and a homeowner who assumes softeners just do that.

Chloramine is more persistent than free chlorine, which is the practical problem. It does not dissipate the way chlorine does, so the resin sees it continuously.

What a prefilter does

Putting carbon ahead of the softener is a common way to reduce what the resin is exposed to. The detail people miss is that not all carbon is the same. Standard activated carbon is rated against chlorine. Catalytic carbon, or a comparable media specifically rated for chloramines, is what the job actually calls for.

If a quote lists a carbon prefilter with no mention of chloramines, that is worth one question before you sign.

Flow rate matters too. Contact time is what does the work, so a filter that is undersized for your house is decoration.

What we are not saying

Consider a prefilter. That is the strength of the claim.

This is not a lab result for your tap, it is a general note about the disinfectant the city describes using. It is not a health warning and it is not medical advice. Chloramines are a standard, approved municipal disinfectant used across the country.

We are also not steering you toward a specific product before you know your hardness band. Sizing comes first. Protection comes second.

If you want the specifics for your house

The $79 spec includes a consider or skip call on a chloramine rated prefilter based on your setup, along with the softener sizing math and the questions to ask a contractor.