U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 28, 2025
Any new source subject to this subpart must achieve the following new source performance standards (NSPS):
Subpart H—Hydrofluoric Acid
| Pollutant or pollutant property | NSPS effluent limitations | |
|---|---|---|
| Maximum for any 1 day | Average of daily values for 30 consecutive days | |
| Kg/kkg (or pounds per 1,000 lb) of product | ||
| TSS | 6.0 | 3.0 |
| Fluoride (T) | 3.4 | 1.6 |
| Nickel (T) | 0.020 | 0.0060 |
| Zinc (T) | 0.072 | 0.022 |
| pH | ( 1) | ( 1) |
1 Within the range 6.0 to 9.0.
