2,3,7,8-TCDD (Dioxin) (P)
What is the water + organism criterion (µg/l) for 2,3,7,8-TCDD (Dioxin) (P)?
For 2,3,7,8-TCDD (Dioxin) (P), water + organism criterion (µg/l) is 5.0E-9; organism only criterion (µg/l) is 5.1E-9; publication year is 2002; cas registry number is 1746016, verified against its source on 2026-10-28.
2,3,7,8-TCDD (Dioxin) (P) | 1746016 | 5.0E-9 | 5.1E-9 | 2002
— epa.gov, retrieved 2026-09-15
- Pollutant name
- 2,3,7,8-TCDD (Dioxin) (P) verified
- CAS Registry Number
- 1746016 verified
- Water + Organism criterion (µg/L)
- 5.0E-9 verified
- Organism Only criterion (µg/L)
- 5.1E-9 verified
- Publication Year
- 2002 verified
- EPA note on this criterion
- This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right). EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. Refer to EPA's National Primary Drinking Water Regulations. The CWA section 304(a) water quality criteria for dioxin is expressed in terms of 2,3,7,8-Tetrachloro-dibenzo-p-dioxin (2,3,7,8-TCDD) and should be used in conjunction with the recommended toxicity equivalence factors for dioxin and dioxin-like compounds (USEPA, 2010) to account for the additive effects of other dioxin-like compounds. verified
Where each value comes from
The value above is stated away from the sentence quoted with the answer, so the passage that states it is shown here too.
EPA note on this criterion
2,3,7,8-TCDD (Dioxin) (P) | 1746016 | 5.0E-9 | 5.1E-9 | 2002 | This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right). EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. Refer to EPA's National Primary Drinking Water Regulations. The CWA section 304(a) water quality criteria for dioxin is expressed in terms of 2,3,7,8-Tetrachloro-dibenzo-p-dioxin (2,3,7,8-TCDD) and should be used in conjunction with the recommended toxicity equivalence factors for dioxin and dioxin-like compounds (USEPA, 2010) to account for the additive effects of other dioxin-like compounds.
— all from epa.gov, retrieved 2026-09-15
Source
- epa.govhttps://www.epa.gov/wqc/national-recommended-water-quality-criteria-human-health-criteria-table