GroundRules
40 CFR 421.22: Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
Where this section sits in the code
- Title 40—Protection of Environment
- CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
- SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS
- PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY
- Subpart B—Primary Aluminum Smelting Subcategory
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable technology currently available (BPT):
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
Metric units—kg/kkg of product
English units—lbs/thousand lbs of product
Fluoride 2.0 1.0
Total Suspended solids 3.0 1.5
pH (1) (1)
1 Within the range of 6 to 9 at all times.
Collected 2026-08-27T02:26:04Z. Source file · JSON