Contact Us
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Reader questions
hello@h2oinsider.comQuestions about filter recommendations, contaminant concerns, or interpreting your water test results. We answer every email — typically within 2 business days.
Corrections & editorial
editorial@h2oinsider.comFactual corrections, outdated certification claims, discontinued products, or errors in our contaminant guides. Include the page URL and the specific claim.
Press & media
press@h2oinsider.comInterview requests, data inquiries, or citation permissions. We respond to press inquiries within 1 business day.
Manufacturer & brand outreach
brands@h2oinsider.comProduct submissions for review consideration, factual corrections to brand pages, or certification update notifications. Note: We do not accept payment for reviews or rankings.
Before you write
If you have a question about a specific contaminant or filter recommendation, our content may already answer it: