# Guides

> Diagnostic guides: a symptom or a lab result in, a treatment class out, with the EPA or NSF limit cited by number.

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|---|---|
| Source | https://ownerspec.com/water/guides/ |
| Publisher | OwnerSpec (https://ownerspec.com/) |
| Published | 2026-09-11 |
| Updated | 2026-09-11 |

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Each guide starts from something you can see, smell or read off a test report, and ends at
the class of equipment that fixes it. The regulatory limit is cited by number, and the
sizing or part page that follows is linked from the guide.

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Citation: OwnerSpec, "Guides", https://ownerspec.com/water/guides/, updated 11 September 2026.
Reuse: quoting with attribution and a link is permitted. See https://ownerspec.com/legal/terms/.