# Mercury Cell Chlor-Alkali Plants — EPA NESHAP Source Category Applicability Crosswalk For Mercury Cell Chlor-Alkali Plants, cfr subpart is 40 CFR 63 Subpart IIIII; source type is major sources; epa category url is https://www.epa.gov/stationary-sources-air-pollution/mercury-cell-chloralkali-plants-national-emissions-standards, recorded from its source on 2026-08-15. - **source category:** Mercury Cell Chlor-Alkali Plants _(verified: appears in the quote below)_ - **cfr subpart:** 40 CFR 63 Subpart IIIII _(verified: appears in the quote below)_ - **source type:** major sources _(our reading, not quoted from the source)_ - **epa category url:** https://www.epa.gov/stationary-sources-air-pollution/mercury-cell-chloralkali-plants-national-emissions-standards _(our reading, not quoted from the source)_ ## What the source says > Mercury Cell Chlor-Alkali Plants | 40 CFR 63 Subpart IIIII ## Source - https://www.epa.gov/stationary-sources-air-pollution/national-emission-standards-hazardous-air-pollutants-neshap-8 Last verified: 2026-08-15. Review by: 2026-12-13. Part of [EPA NESHAP Source Category Applicability Crosswalk](https://referencesource.org/neshap-source-category-crosswalk/).