40 CFR § 455.23 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT).

---
identifier: "/us/cfr/t40/s455.23"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 455.23 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT)."
title_number: 40
title_name: "Protection of Environment"
section_number: "455.23"
section_name: "Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT)."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "455"
part_name: "PESTICIDE CHEMICALS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Secs. 301, 304, 306, 307, and 501, Pub. L. 92-500, 86 Stat. 816, Pub. L. 95-217, 91 Stat. 156, and Pub. L. 100-4 (33 U.S.C. 1311, 1314, 1316, 1317, and 1361)."
regulatory_source: "43 FR 17776, Apr. 25, 1978, unless otherwise noted."
cfr_part: "455"
---


# 455.23 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT).

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology: The limitations for BOD, TSS and pH are the same as those specified in 40 CFR 455.22.

BCT Effluent Limitations

Effluent Limitations

| Pollutant or pollutant property | Maximum for any one day** | Average of daily values shall not exceed** |
| --- | --- | --- |
| BOD | 7.400 | 1.6000 |
| TSS | 6.100 | 1.8000 |
| pH | * | * |
| * Within the range 6.0 to 9.0 |  |  |
| ** Metric units: Kilogram pollutant/1,000 kg of total organic active ingredients. |  |  |
| English units: Pound pollutant/1,000 lb of total organic active ingredients |  |  |

[58 FR 50689, Sept. 28, 1993]