---
title: "Drinking water quality standards"
chunk: 2/2
source: "https://en.wikipedia.org/wiki/Drinking_water_quality_standards"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T08:24:56.822367+00:00"
instance: "kb-cron"
---

Arsenic 10 μg/L
Barium 10 μg/L
Boron 2400 μg/L
Chromium 50 μg/L
Fluoride 1500 μg/L
Selenium 40 μg/L
Uranium 30 μg/L
Organic species:

Benzene 10 μg/L
Carbon tetrachloride 4 μg/L
1,2-Dichlorobenzene 1000 μg/L
1,4-Dichlorobenzene 300 μg/L
1,1-Dichloroethane 30 μg/L
1,2-Dichloroethene 50 μg/L
Dichloromethane 20 μg/L
Di(2-ethylhexyl)phthalate 8 μg/L
1,4-Dioxane 50 μg/L
Edetic acid 600 μg/L
Ethylbenzene 300 μg/L
Hexachlorobutadiene 0.6 μg/L
Nitrilotriacetic acid 200 μg/L
Pentachlorophenol 9 μg/L
Styrene 20 μg/L
Tetrachloroethene 40 μg/L
Toluene 700 μg/L
Trichloroethene 20 μg/L
Xylene 500 μg/L

== Comparison of parametric values ==
The following table provides a comparison of a selection of parameters for concentrations listed by WHO, the European Union, EPA, and Ministry of Environmental Protection of China.

Notes
" indicates that no standard has been identified by editors of this article and ns indicates that no standard exists. μg/L = micrograms per litre, or 0.001 ppm; mg/L = 1 ppm, or 1000 μg/L.
* means action level; not a concentration standard. A public water system exceeding the action level must implement "treatment techniques" which are enforceable procedures.
** TT (treatment technique). The public water system must certify that the combination of dose and monomer level does not exceed: acrylamide = 0.05% dosed at 1 mg/L (or equivalent); epichlorohydrin = 0.01% dosed at 20 mg/L (or equivalent).

== See also ==
Water pollution

== References ==

== Further reading ==
Water Quality and Your Health - US Centers for Disease Control
Guidelines for drinking-water quality incorporating 1st and 2nd addenda (PDF). Vol. 1 (3rd ed.). World Health Organization. 2008. ISBN 978-92-4-154761-1.
Drinking Water Regulations: Overview - US EPA