Regulations last checked for updates: May 01, 2025
Title 40 - Protection of Environment last revised: Nov 01, 2025
§ 410.60 - Applicability; description of the carpet finishing subcategory.
The provisions of this subpart are applicable to process wastewater discharges resulting from the following types of textile mills: carpet mills, which may include any or all of the following unit operations: Bleaching, scouring, carbonizing, fulling, dyeing, printing, resin treatment, waterproofing, flameproofing, soil repellency, looping, and backing with foamed and unfoamed latex and jute. Carpet backing without other carpet manufacturing operations is included in subpart C.
§ 410.61 - Specialized definitions.
In addition to the definitions set forth in 40 CFR part 401 and § 410.01 of this part, the following definitions apply to this subpart:
(a) The term product shall mean the final carpet produced or processed including the primary backing but excluding the secondary backing.
(b) The term simple manufacturing operation shall mean the following unit processes: fiber preparation and dyeing with or without carpet backing.
(c) The term complex manufacturing operation shall mean “simple” unit processes (fiber preparation, dyeing and carpet backing) plus any additional manufacturing operations such as printing or dyeing and printing.
§ 410.62 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
(a) 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 degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):
| Pollutant or pollutant property
| BPT limitations
|
|---|
| Maximum for any 1 day
| Average of daily values for 30 consecutive days
|
|---|
| Kg/kkg (or pounds per 1,000 lb) of product
|
| BOD5 | 7.8 | 3.9
|
| COD | 70.2 | 35.1
|
| TSS | 11.0 | 5.5
|
| Sulfide | 0.08 | 0.04
|
| Phenol | 0.04 | 0.02
|
| Total Chromium | 0.04 | 0.02
|
| pH | (
1) | (
1)
|
(b) The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section and attributable to the manufacture of carpets through complex manufacturing operations, which may be discharged by a point source subject to the provisions of this subpart, in addition to the discharge allowed by paragraph (a) of this section.
| Pollutant or pollutant property
| BPT limitations
|
|---|
| Maximum for any 1 day
| Average of daily values for 30 consecutive days
|
|---|
| Kg/kkg (or pounds per 1,000 lb) of product
|
| COD | 20.0 | 10.0 |
§ 410.63 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).
(a) Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following efflluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT):
| Pollutant or pollutant property
| BAT limitations
|
|---|
| Maximum for any 1 day
| Average of daily values for 30 consecutive days
|
|---|
| Kg/kkg (or pounds per 1,000 lb) of product
|
| COD | 70.2 | 35.1
|
| Sulfide | 0.08 | 0.04
|
| Phenols | 0.04 | 0.02
|
| Total chromium | 0.04 | 0.02 |
(b) The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section and attributable to the manufacture of carpets through complex manufacturing operations, which may be discharged by a point source subject to the provisions of this subpart, in addition to the discharge allowed by paragraph (a) of this section.
| Pollutant or pollutant property
| BAT limitations
|
|---|
| Maximum for any 1 day
| Average of daily values for 30 consecutive days
|
|---|
| Kg/kkg (or pounds per 1,000 lb) of product
|
| COD | 20.0 | 10.0 |
§ 410.64 - Pretreatment standards for existing sources (PSES).
Any existing source subject to this subpart that introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403.
§ 410.65 - New source performance standards (NSPS).
Any new source subject to this subject must achieve the following new source performance standards (NSPS):
| Pollutant or pollutant property
| NSPS limitations
|
|---|
| Maximum for any 1 day
| Average of daily values for 30 consecutive days
|
|---|
| kg/kkg (or pounds per 1,000 lb) of product
|
| BOD5 | 4.6 | 2.4
|
| COD | 26.6 | 17.1
|
| TSS | 8.6 | 3.8
|
| Sulfide | 0.08 | 0.04
|
| Phenols | 0.04 | 0.02
|
| Total chromium | 0.04 | 0.02
|
| pH | (
1) | (
1)
|
§ 410.66 - Pretreatment standards for new sources (PSNS).
Any new source subject to this subpart that introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403.
§ 410.67 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT). [Reserved]
authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) (the “Act”);
33 U.S.C. 1311,
1314,
c,
e,
and, 1316 (b) and
c, 1317 (b) and
c,
and; 86 Stat. 186
source: 47 FR 38819, Sept. 2, 1982, unless otherwise noted.
cite as: 40 CFR 410.61