Enhanced content is provided to the user to provide additional context.
This content is from the eCFR and is authoritative but unofficial.
Navigate by entering citations or phrases (eg:1 CFR 1.149 CFR 172.101Organization and Purpose1/1.1Regulation YFAR).
Choosing an item fromcitations and headings will bring you directly to the content. Choosing an item fromfull text search results will bring you to those results. Pressing enter in the search box will also bring you to search results.
Background and more details are available in theSearch & Navigation guide.
The in-page Table of Contents is available only when multiple sections are being viewed.
Use the navigation links in the gray bar above to view the table of contents that this content belongs to.
Secs. 301(b)(1)(B), 304(d)(1), 304(d)(4), 308, and 501 of the Federal Water Pollution Control Act as amended by the Federal Water Pollution Control Act Amendments of 1972, the Clean Water Act of 1977, and the Municipal Wastewater Treatment Construction Grant Amendments of 1981;33 U.S.C. 1311(b)(1)(B),1314(d) (1) and (4), 1318, and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 95 Stat. 1623, Pub. L. 97-117.
49 FR 37006, Sept. 20, 1984, unless otherwise noted.
This content is from the eCFR and may include recent changes applied to the CFR. The official, published CFR, is updated annually and available below under "Published Edition". You can learn more about the processhere.
Subscribe to: 40 CFR 133.105
No changes found for this content after 1/03/2017.
View the most recent official publication:
These links go to the official, published CFR, which is updated annually. As a result, it may not include the most recent changes applied to the CFR.Learn more.
Information and documentation can be found in ourdeveloper resources.
TheCode of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in theFederal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.
Learn more about the eCFR, its status, and the editorial process.
This section describes the minimum level of effluent quality attainable by facilities eligible for treatment equivalent to secondary treatment (§ 133.101(g)) in terms of the parameters—BOD5, SS and pH. All requirements for the specified parameters inparagraphs (a),(b) and(c) of this section shall be achieved except as provided for in§ 133.103, orparagraphs (d),(e) or(f) of this section.
(a)BOD5.
(1) The 30-day average shall not exceed 45 mg/l.
(2) The 7-day average shall not exceed 65 mg/l.
(3) The 30-day average percent removal shall not be less than 65 percent.
(b)SS. Except where SS values have been adjusted in accordance with§ 133.103(c):
(1) The 30-day average shall not exceed 45 mg/l.
(2) The 7-day average shall not exceed 65 mg/l.
(3) The 30-day average percent removal shall not be less than 65 percent.
(c)pH. The requirements of§ 133.102(c) shall be met.
(d)Alternative State requirements. Except as limited byparagraph (f) of this section, and after notice and opportunity for public comment, the Regional Administrator, or, if appropriate, State Director subject to EPA approval, is authorized to adjust the minimum levels of effluent quality set forth inparagraphs (a)(1),(a)(2),(b)(1) and(b)(2) of this section for trickling filter facilities and inparagraphs (a)(1) and(a)(2) of this section for waste stabilization pond facilities, to conform to the BOD5 and SS effluent concentrations consistently achievable through proper operation and maintenance (§ 133.101(f)) by the median (50th percentile) facility in a representative sample of facilities within a State or appropriate contiguous geographical area that meet the definition of facilities eligible for treatment equivalent to secondary treatment (§ 133.101(g)).
(The information collection requirements contained in this rule have been approved by OMB and assigned control number 2040-0051)
(e)CBOD5 limitations:
(1) Where data are available to establish CBOD5 limitations for a treatment works subject to this section, the NPDES permitting authority may substitute the parameter CBOD5 for the parameter BOD5 In§§ 133.105(a)(1),133.105(a)(2) and133.105(a)(3), on a case-by-case basis provided that the levels of CBOD5 effluent quality are not less stringent than the following:
(i) The 30-day average shall not exceed 40 mg/l.
(ii) The 7-days average shall not exceed 60 mg/l.
(iii) The 30-day average percent removal shall not be less than 65 percent.
(2) Where data are available, the parameter CBOD5 may be used for effluent quality limitations established underparagraph (d) of this section. Where concurrent BOD effluent data are available, they must be submitted with the CBOD data as a part of the approval process outlined inparagraph (d) of this section.
(f)Permit adjustments. Any permit adjustment made pursuant to this part may not be any less stringent than the limitations required pursuant to§ 133.105(a)-(e). Furthermore, permitting authorities shall require more stringent limitations when adjusting permits if:
(1) For existing facilities the permitting authority determines that the 30-day average and 7-day average BOD5 and SS effluent values that could be achievable through proper operation and maintenance of the treatment works, based on an analysis of the past performance of the treatment works, would enable the treatment works to achieve more stringent limitations, or
(2) For new facilities, the permitting authority determines that the 30-day average and 7-day average BOD5 and SS effluent values that could be achievable through proper operation and maintenance of the treatment works, considering the design capability of the treatment process and geographical and climatic conditions, would enable the treatment works to achieve more stringent limitations.
[49 FR 37006, Sept. 20, 1984;49 FR 40405, Oct. 16, 1984]