Arsenic (P)
What is the water + organism criterion (µg/l) for Arsenic (P)?
For Arsenic (P), water + organism criterion (µg/l) is 0.018; organism only criterion (µg/l) is 0.14; publication year is 1992; cas registry number is 7440382, verified against its source on 2026-10-28.
Arsenic (P) | 7440382 | 0.018 | 0.14 | 1992
— epa.gov, retrieved 2026-09-15
- Pollutant name
- Arsenic (P) verified
- CAS Registry Number
- 7440382 verified
- Water + Organism criterion (µg/L)
- 0.018 verified
- Organism Only criterion (µg/L)
- 0.14 verified
- Publication Year
- 1992 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. This recommended water quality criterion for arsenic refers to the inorganic form only. 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
Arsenic (P) | 7440382 | 0.018 | 0.14 | 1992 | 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. This recommended water quality criterion for arsenic refers to the inorganic form only.
— all from epa.gov, retrieved 2026-09-15
Source
- epa.govhttps://www.epa.gov/wqc/national-recommended-water-quality-criteria-human-health-criteria-table