StacksVerified U.S. regulatory reference

40 CFR §61.52

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Emissions to the atmosphere from mercury ore processing facilities and mercury cell chlor-alkali plants shall not exceed 2.3 kg (5.1 lb) of mercury per 24-hour period.
  2. (b)Emissions to the atmosphere from sludge incineration plants, sludge drying plants, or a combination of these that process wastewater treatment plant sludges shall not exceed 3.2 kg (7.1 lb) of mercury per 24-hour period.