Methodology · How this publication works
How we review water treatment providers
Every provider on this site is evaluated against the same seven criteria and written up with the same pros and cons discipline. This page explains those criteria, defines what a pro and a con mean here, and states plainly where editorial judgment begins and ends.
Our evaluation criteria
Applied to all seven providers, weighted for St. Louis households.
C1 Accountability and ownership
Who answers when something goes wrong: a local owner, a franchised dealer, or a manufacturer's warranty desk. The shorter that chain, the better we score it.
C2 Fit for the St. Louis region
Coverage of the metro and the well-water counties west and south of it, and familiarity with the mix of municipal river water and private wells found here.
C3 Water testing practice
Whether the provider tests your water before proposing equipment, what that testing costs, and whether quotes are tied to measured results.
C4 Pricing transparency
Whether a homeowner can understand what they are paying for and why. We never publish specific prices, because dealer and job pricing varies too much to state responsibly.
C5 Responsiveness
How inquiries, scheduling, and service calls are handled, and whether the service model supports a fast turnaround in this region.
C6 Equipment range and technology
The breadth and quality of the equipment on offer: softening, filtration, drinking water systems, and any distinctive engineering.
C7 Installation and after-sale model
Who installs, who services, how parts are sourced, and what the homeowner is left holding after the truck leaves.
What our pros and cons mean
The discipline behind the red and green columns.
- Pros are specific strengths under the criteria above, stated only when we are confident they hold. A pro is not praise; it is a fact we consider an advantage for a St. Louis household.
- Cons are structural trade-offs of a provider's business model: things like dealer-to-dealer variability or self-install responsibility. They are not complaints, anecdotes, or accusations.
- We phrase cons generically when reality varies by location. "Dealer experience varies by location" means exactly that: the same brand can be excellent in one territory and mediocre in another, and we will not pretend otherwise.
- We do not publish unverified anecdotes, invented pricing, customer counts we cannot substantiate, or disparaging claims about any provider.
Editorial judgment statement
Where the verdicts come from.
Our verdicts are editorial judgments, not laboratory results.
St. Louis Water Reviews does not operate a test lab. We form our assessments by applying the seven criteria above to each provider's publicly described service model, coverage, practices, and equipment, weighted toward what matters for a household in this region. Reasonable people can weigh these criteria differently; we publish ours so you can see exactly how we arrived at our recommendation.
Sponsorship and compensation
This site features sponsored placements and may be compensated when you request a quote through our forms. Sponsorship influences prominence, not content: a provider's pros, cons, and the facts we publish are written to the same standard whether or not we are compensated. If we have a fact wrong, we want it fixed; factual corrections are reviewed promptly.
Ready to compare providers? Return to the reviews or jump to our 2026 recommendation.