U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT:
(a) Effluent Limitations
| Regulated parameter | Maximum daily 1 | Maximum monthly avg. 1 |
|---|---|---|
| BOD | 61 | 22 |
| TSS | 58 | 26 |
| Oil and grease (HEM) | 36 | 16 |
| Copper | 0.84 | |
| Mercury | 0.0031 | |
| pH | ( 2) | ( 2) |
1 Mg/L (ppm)
2 Within 6 to 9 at all times.
