# 2,3,7,8-TCDD (Dioxin) (P) — EPA national recommended water quality criteria for human health: pollutant concentration thresholds

For 2,3,7,8-TCDD (Dioxin) (P), cas registry number is 1746016; water + organism criterion (µg/l) is 5.0E-9; organism only criterion (µg/l) is 5.1E-9, verified against its source on 2026-08-17.

- **Pollutant name:** 2,3,7,8-TCDD (Dioxin) (P) _(verified: appears in the quote below)_
- **CAS Registry Number:** 1746016 _(verified: appears in the quote below)_
- **Water + Organism criterion (µg/L):** 5.0E-9 _(verified: appears in the quote below)_
- **Organism Only criterion (µg/L):** 5.1E-9 _(verified: appears in the quote below)_

## What the source says

> 2,3,7,8-TCDD (Dioxin) (P) | 1746016 | 5.0E-9 | 5.1E-9 | 2002

## Source

- https://www.epa.gov/wqc/national-recommended-water-quality-criteria-human-health-criteria-table

Last verified: 2026-08-17. Review by: 2028-08-16.
Part of [EPA national recommended water quality criteria for human health: pollutant concentration thresholds](https://referencesource.org/epa-water-quality-criteria-human-health/).