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 or § 437.30(b), any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT:
BPT Limitations
| Regulated
parameter | Maximum daily 1 | Maximum monthly avg. 1 |
|---|---|---|
| BOD | 163 | 53.0 |
| pH | ( 2) | ( 2) |
| TSS | 216 | 61.3 |
| Copper | 0.865 | 0.757 |
| Zinc | 0.497 | 0.420 |
| Acetone | 30.2 | 7.97 |
| Acetophenone | 0.114 | 0.0562 |
| 2-Butanone | 4.81 | 1.85 |
| o-Cresol | 1.92 | 0.561 |
| p-Cresol | 0.698 | 0.205 |
| Phenol | 3.65 | 1.08 |
| Pyridine | 0.370 | 0.182 |
| 2,4,6-Trichlorophenol | 0.155 | 0.106 |
1 mg/L (ppm).
2 Within the range 6 to 9.
