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Independent Houston water-treatment research
Water Filtration in Houston: Compare Local Water Treatment Companies
Water Filtration Houston is an independent directory of 73 water treatment companies in Houston and its suburbs, each checked against its own website on October 18, 2026. Compare water softener, whole-house filtration and reverse osmosis installers, see what Houston's water reports actually say, and know which claims to verify before you choose one.
✓Source checkedProvider-owned pages reviewed↕No paid rankingCompensation does not set orderiClear limitsUnknown claims stay unknown
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Popular Water-Treatment Topics in Houston
Most Houston projects start with hardness. The City of Houston's 2025 Water Quality Report puts its Main System's total hardness at 135.5 ppm average as calcium carbonate, with results that vary across the system, and 62 of the 73 companies in our directory list softener service. Our Houston water softener guide explains how to size a system from your own test and compare quotes.
Current research set
Houston Water-Treatment Providers
73 Houston-area companies whose own websites describe water softener, water filtration or reverse osmosis service, each re-checked on October 18, 2026.
- Companies listed
- 73
- Water softeners
- 62
- Water filtration
- 49
- Reverse osmosis
- 50
Every listing shows the company's phone and website where verified, service tags backed by a quote from its own site, and whether it serves homes, businesses or both where known. Filter the full list by service, area and customer type.
Browse all 73 Houston companies →City pages
- Katy water treatment companies15 companies, 5 based in Katy
- Cypress water treatment companies14 companies, 7 based in Cypress
- Spring water treatment companies10 companies, 3 based in Spring
- Sugar Land water treatment companies8 companies, 1 based in Sugar Land
- The Woodlands water treatment companies7 companies, 0 based in The Woodlands
- Pearland water treatment companies6 companies, 0 based in Pearland
Suburb sections in the directory
- Richmond (8)
- Pasadena (6)
- Tomball (6)
- Missouri City (5)
- Humble (5)
- Conroe (5)
- Fulshear (5)
- League City (3)
Compare treatment types
Water Softener vs. Whole-House Filter vs. Reverse Osmosis in Houston
Each system solves a different problem. Start with the measured concern, then compare companies that list that service.
| System | What it addresses | Where it goes | What to measure first | Houston companies listing it |
|---|---|---|---|---|
| Water softener | Calcium and magnesium hardness (scale, spotting, soap film) | Point of entry, whole house | Hardness at your tap, iron, household size, peak flow | 62 of 73 |
| Whole-house filter | A named whole-home goal, such as chloramine taste and odor or sediment | Point of entry, whole house | Disinfectant your utility uses, flow rate, the certified claim for the exact model | 49 of 73 |
| Reverse osmosis | Drinking and cooking water at one tap, for certified contaminant claims | Point of use, usually under the kitchen sink | Your report or lab test, water pressure, daily drinking-water use | 50 of 73 |
Company counts come from the service statements on each company's own website, checked October 18, 2026; many companies list more than one service. See the reverse osmosis vs. whole-house filter comparison and the reverse osmosis vs. water softener guide for detail.
Equipment brands sold in Houston
Researching a specific brand a company quoted? These pages explain what each brand publishes and what to ask a dealer.
How it works
Research a Houston Provider in Three Steps
Use the directory as a starting point, then verify the details that matter for your project.
Compare source-checked fields
Review each company’s quoted service statements, source pages, phone, website and check date.
Verify before choosing
Confirm availability, scope, credentials, warranties and pricing directly with the provider.
Research library
Cost, Comparison & Buying Guides
Cost guideWater Softener Cost in Houston
Review the inputs that affect equipment and installation cost before comparing proposals.
Read guide →
ComparisonReverse Osmosis vs. Whole-House Filtration
Compare point-of-use drinking water treatment with point-of-entry filtration.
Read guide →
Buying guideChoose a Home Water Filtration System
Match the treatment category to your water evidence and property requirements.
Read guide →Homeowner guideSigns You May Need a Water Softener
Understand common hard-water indicators and what should be measured before buying.
Read guide →Greater Houston
Areas Included in Our Houston Directory
Individual provider coverage varies and should be confirmed directly.
HoustonSugar LandKatyPearlandCypressSpringThe WoodlandsMissouri CityRichmondRosenbergStaffordFresnoFriendswoodSouth HoustonPasadenaGalena ParkChannelviewSheldonCrosbyBarrettHighlandsDyersdaleAtascocitaHumbleWestfieldAldineJersey VillageFulshearTomballArcola
For water-treatment providers
Is Your Public Information Accurate?
Review our listing methodology, source requirements and correction process. Participation or compensation does not control organic ordering.
Directory FAQ
Frequently Asked Questions
Understand what the directory verifies, what remains unknown, and how to compare providers responsibly.
How many water treatment companies serve Houston?+
This directory lists 73 Houston-area companies whose own websites describe water softener, water filtration or reverse osmosis service, each re-checked on October 18, 2026. 62 of them list water softener service. Coverage still has to be confirmed for your address.
How hard is Houston tap water?+
For the City of Houston Main System, the 2025 Houston Public Works Water Quality Report lists total hardness at 135.5 ppm average as calcium carbonate. Reported range 43.5–229 ppm, about 7.9 grains per gallon on average (2.5–13.4 gpg). Many suburban homes are served by a utility district instead, so check the system named on your bill and test at your tap before sizing a softener.
Do I need a water softener, a whole-house filter or reverse osmosis?+
It depends on the measured problem. A softener reduces hardness minerals, a whole-house filter needs a named point-of-entry goal such as chloramine taste and odor, and reverse osmosis treats drinking and cooking water at one tap. The comparison table above shows what to measure for each.
Does Water Filtration Houston install water-treatment systems?+
No. Water Filtration Houston is an independent publisher and provider-matching service. Participating providers are separate companies that evaluate and perform project work.
Are these providers ranked from best to worst?+
No. The Houston directory is shown alphabetically. Inclusion is based on each company’s own website describing water softener, filtration or reverse osmosis service in the Houston area—not ratings, payment or an unsupported “best” score.
What does source checked mean?+
It means each company’s website was opened again on October 18, 2026 and still described the listed services; the quote and source page are shown with each service tag. It does not verify licensing, insurance, pricing, availability or workmanship.
How should I compare providers?+
Confirm service and address fit, ask each provider for a written scope, and independently verify credentials, warranties and product claims that matter to your decision.
Can Water Filtration Houston help me find a provider?+
You can call (281) 768-4021. You are reaching Water Filtration Houston, which may route qualified inquiries to a participating provider. The publisher is not the installer.
Provider matching
Ready to Find a Houston Provider?
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