# Hydrogen ion concentration — Drinking water contaminant limits by regulator

For Hydrogen ion concentration, regulator is European Union (Directive 2020/2184); limit is ≥ 6,5 and ≤ 9,5; unit is pH units; limit type is Indicator parameter, recorded from its source on 2026-08-06.

- **Contaminant:** Hydrogen ion concentration _(verified: appears in the quote below)_
- **Regulator:** European Union (Directive 2020/2184) _(our reading, not quoted from the source)_
- **Limit:** ≥ 6,5 and ≤ 9,5 _(verified: appears in the quote below)_
- **Unit:** pH units _(verified: appears in the quote below)_
- **Limit type:** Indicator parameter _(our reading, not quoted from the source)_

## What the source says

> Hydrogen ion concentration | ≥ 6,5 and ≤ 9,5 | pH units

## Source

- https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32020L2184

Last verified: 2026-08-06. Review by: 2027-08-06.
Part of [Drinking water contaminant limits by regulator](https://referencesource.org/drinking-water-contaminant-limits/).