# 2-Chloronaphthalene (P) — EPA national recommended water quality criteria for human health: pollutant concentration thresholds

For 2-Chloronaphthalene (P), cas registry number is 91587; water + organism criterion (µg/l) is 800; organism only criterion (µg/l) is 1,000, verified against its source on 2026-08-17.

- **Pollutant name:** 2-Chloronaphthalene (P) _(verified: appears in the quote below)_
- **CAS Registry Number:** 91587 _(verified: appears in the quote below)_
- **Water + Organism criterion (µg/L):** 800 _(verified: appears in the quote below)_
- **Organism Only criterion (µg/L):** 1,000 _(verified: appears in the quote below)_

## What the source says

> 2-Chloronaphthalene (P) | 91587 | 800 | 1,000 | 2015

## 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/).