One inbox, read by a person. Corrections are looked at first, because a wrong claim on a page about drinking water is the thing here most worth fixing quickly.
Writing costs you nothing beyond the message. There is no form, no account and no newsletter, and we do not ask for your name.
Each link below fills in the subject so the message lands in the right place. The address above works just as well if your device does not open a mail app.
Something here is wrong, out of date, or a certification has lapsed since we looked.
Helpful to include: The page it is on, the claim you are questioning, and a source if you have one. A certifier listing or a manufacturer document is ideal, and a note saying what you saw is plenty.
Write about thisSomething we have missed, or a system you own that is better than what we recommend.
Helpful to include: The brand and model number, and the problem it solves for you. Model numbers matter more than names here, because that is what the certifier databases index by.
Write about thisSpecification updates, new certifications, and corrections to anything we have published about your products.
Helpful to include: The model string your certificate is filed under, which is usually not the name on the retail listing. Placement and scores are not for sale: scores are calculated by a published formula, so there is no lever to pull.
Write about thisQuestions about the method, the scoring, or how to check a certification yourself.
Helpful to include: Whatever context you have. The two questions we get most are answered below, and they may save you the message.
Write about thisWe check it against the source. If a certification is involved that means the certifying body's own database rather than the manufacturer's page, searched by the model string the record is filed under. If the claim on the site turns out to be wrong, the page is fixed, its updated date changes so readers can see it has been looked at, and the change goes on the corrections record, which currently lists the two times this has happened.
If the claim turns out to be right, you get an answer saying why, with the record we read. That is a useful reply either way, and it is the reason this is worth your time to send.
Start with a test, not a product. The right filter follows from what is actually in your water, and that is measurable. A municipal supply comes with an annual water quality report from your utility, free on request. A private well needs a state-certified laboratory test, which runs roughly $50 to $200 and tells you which of six or seven common problems you have. Once you have that result, our pages will make far more sense, and the answer is frequently a cheaper filter than you expected.
Three accredited bodies certify household water filters in the United States, all three publish a free public database, and none of them needs an account. The catch is that they index by the manufacturer's model string rather than the retail name, which is why searching the Amazon title returns nothing and most people give up there. We have written out the method in four steps, and it works on any filter sold anywhere, including ones we have never covered.