Alderstone Water Company is a locally owned Louisville water treatment company. A Better Standard of Water. Better Water Starts Here.
Louisville homeowners often get sold “a water system” as if one tank does every job. It does not. A whole-house water filter and a water softener solve different problems at the faucet. This page is the side-by-side: what each is for, how to tell which complaint you have, when both belong in the same home, and how to quote without a house visit.
Call or text 502-865-9330, or get a quote for filter, softener, or both. Quote is by phone or text — not a house visit.
Local pages: whole-home filter in Louisville · water softener in Louisville · whole-home systems.
Quick answer
| If you notice… | Start with… | Why |
|---|---|---|
| Spots on glasses, film, lazy soap, faucet crust, scale | Water softener | Hardness (calcium / magnesium) |
| Pool smell in the shower, chlorine or chloramine taste in coffee/tea | Whole-house filter | Disinfectant taste and odor at every tap |
| Spots and shower smell | Both (or a whole-home package conversation) | Two jobs, not one tank |
| Only the drinking glass | Kitchen RO (not this comparison) | Drinking faucet only |
Decision posts if you are still sorting symptoms: Do I Need a Water Softener in Louisville? · Hard Water Louisville.
What a whole-house water filter does
A whole-house (point-of-entry) filter treats water where it enters the home so every tap can see the same filtration — showers, laundry, ice maker, and kitchen sink. In Louisville-area city homes, the usual reason people shop this path is taste and odor: pool smell upstairs, medicinal or flat taste in coffee, chloramine / total chlorine notes that a pitcher barely touches.
That is a filtration job. It is not a hardness job. A filter will not stop dishwasher spots the way a softener does.
Local filter page: /whole-home-filter/louisville-ky/. Hub: /whole-home-filter/. Broader chloramine context: Chloramine in Louisville Water and Why Louisville Tap Water Smells Like Chlorine.
City water is treated and regulated. Wanting the shower to smell like water is a comfort choice — not a claim that the utility failed overnight.
What a water softener does
A conventional salt softener exchanges hardness minerals on resin. Softened water goes to showers, laundry, and fixtures. That path is for:
- White film and spots that survive the dishwasher
- Soap and shampoo that will not lather
- Crust on chrome, glass doors, and faucet tips
- Scale you can see in kettles or on heating surfaces
Full symptom language: Hard Water Louisville. Softener need decision: Do I Need a Water Softener in Louisville KY?. Local softener page: /water-softener/louisville-ky/. Hub: /water-softener/.
A softener is not built to clear chloramine or chlorine taste and smell. Short cross-link (do not stop here — that post owns the full chemistry answer): Does a Water Softener Remove Chlorine?.
Side-by-side: filter vs softener
| Whole-house filter | Water softener | |
|---|---|---|
| Primary job | Taste, odor, sediment / disinfectant feel at every tap | Hardness — spots, film, soap, scale |
| Where you notice a win | Shower smell, coffee/tea taste, “pool” bathroom air | Glasses, chrome, laundry soap, shower doors |
| Fails at | Stopping hardness spots by itself | Clearing chloramine / chlorine shower smell |
| Louisville city homes | Common when chloramine taste/odor bothers | Common when hardness shows at the faucet |
| Well homes | May still apply after well-specific jobs | May apply for hardness — iron/sulfur/sediment often first |
Well vs city still comes before equipment talk: City or Well Water in the Louisville Area. Town hubs (Louisville, Middletown, Jeffersontown, Prospect, Crestwood, and the expanded GBP list) live under water treatment in Louisville.
Softener and chlorine / chloramine (one section only)
Louisville-area city lines commonly use chloramine (total chlorine). Hot showers release that odor. Softener resin does not fix it. If someone already installed a softener “for the smell” and the bathroom still smells like the plant, you need a filtration conversation — not a bigger softener.
Keep reading on that point here: Does a Water Softener Remove Chlorine? · Chloramine in Louisville Water. This comparison page stays on which tank for which job.
When Louisville homes need both
Plenty of metro homes want clear glasses and a shower that does not smell like a pool. That is softener plus whole-home filtration — two named jobs. Packaging language lives on /whole-home-systems/.
Order of talk on the call:
- City or well?
- Spots/soap/crust — yes/no (softener)
- Chlorine/chloramine smell or taste — yes/no (filter)
- Drinking glass only — RO path (separate from this comparison)
Kitchen reverse osmosis is not a whole-house filter and not a softener. It is the dedicated drinking/cooking faucet: /reverse-osmosis/louisville-ky/.
How to choose in one phone call
You do not need a house visit to start.
- Say city or well.
- Say what bothers you most — spots/soap/scale, shower smell / chloramine taste, drinking glass, or more than one.
- Give town or ZIP (Louisville Metro and surrounding GBP towns).
Call or text 502-865-9330, or get a quote for filter, softener, or both / get a quote for filter, softener, or both.
Locally owned · Clear next step · Call or text 502-865-9330.
FAQ
Do I need a whole-house filter or a softener in Louisville?
If the complaint is spots, soap, and scale → softener. If the complaint is shower smell or chloramine/chlorine taste → whole-house filter. If both → both. See the table above.
Will a softener fix chlorine smell?
No. Does a Water Softener Remove Chlorine?
Will a whole-house filter stop spots on glasses?
Not the way a softener does. Spots are a hardness conversation: Hard Water Louisville.
Can I get both in one system conversation?
Yes — that is the /whole-home-systems/ path when both jobs show up. Still two jobs, clearly named.
What about Middletown, Prospect, Shelbyville, La Grange?
Same job split on city water. On a well, start with city or well before assuming a city mixed-bed.
Will you come to the house to decide?
No. We quote by phone or text. Call or text 502-865-9330 or get a quote for filter, softener, or both.