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Categorical Industrial Users: Categories and Requirements

Industrial categories and links to their wastewater pretreatment regulations, and monitoring, reporting, and record-keeping requirements.

EPA Pretreatment Categories and Standards

Categorical industrial users (CIUs) in the following table must comply with the monitoring, reporting, and record-keeping requirements for each of the categories in Title 40, Code of Federal Regulations. Links will exit the TCEQ Website.

Aluminum Forming 467Exit the TCEQ
Battery Manufacturing 461Exit the TCEQ
Carbon Black Manufacturing (New Sources Only) 458Exit the TCEQ
Centralized Waste Treatment 437Exit the TCEQ
Coil Coating 465Exit the TCEQ
Concentrated Animal Feeding Operations (New Sources Only) 412Exit the TCEQ
Copper Forming 468Exit the TCEQ
Electrical & Electronic Components 469Exit the TCEQ
Electroplating 413Exit the TCEQ
Fertilizer Manufacturing (New Sources Only) 418Exit the TCEQ
Glass Manufacturing (New Sources Only) 426Exit the TCEQ
Grain Mills (New Sources Only) 406Exit the TCEQ
Ink Formulating (New Sources Only) 447Exit the TCEQ
Inorganic Chemicals Manufacturing 415Exit the TCEQ
Iron & Steel Manufacturing 420Exit the TCEQ
Leather Tanning & Finishing 425Exit the TCEQ
Metal Finishing 433Exit the TCEQ
Metal Molding & Casting 464Exit the TCEQ
Nonferrous Metals Forming and Metal Powders 471Exit the TCEQ
Nonferrous Metal Manufacturing 421Exit the TCEQ
Oil & Gas Extraction 435Exit the TCEQ
Organic Chemicals, Plastics & Synthetic Fibers 414Exit the TCEQ
Paint Formulating (New Sources Only) 446Exit the TCEQ
Paving & Roofing (Tars and Asphalt) 443Exit the TCEQ
Petroleum Refining 419Exit the TCEQ
Pesticide Chemicals 455Exit the TCEQ
Pharmaceuticals Manufacturing 439Exit the TCEQ
Porcelain Enameling 466Exit the TCEQ
Pulp, Paper & Paperboard 430Exit the TCEQ
Rubber Manufacturing (New Sources Only) 428Exit the TCEQ
Soap & Detergent Manufacturing (New Sources Only) 417Exit the TCEQ
Steam Electric Power Generating 423Exit the TCEQ
Timber Products Processing 429Exit the TCEQ
Transportation Equipment Cleaning 442Exit the TCEQ
Waste Combustors 444Exit the TCEQ

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Monitoring Requirements

Conduct self-monitoring of wastewater discharges for the pretreatment program using 40 CFR Part 136 Exit the TCEQ approved methods and amendments. Collect data with sufficient care to produce evidence admissible in enforcement and judicial actions.

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Reporting Requirements

A facility that meets the criteria of a CIU is required to comply with all federal, state, and local pretreatment requirements. To demonstrate compliance, a CIU needs to submit reports, self-monitor wastewater discharge, and maintain records.

The following types of reports are required under 40 CFR 403.12 Exit the TCEQ

  • baseline monitoring report (BMR) - must be submitted 90 days prior to discharge

  • 90-day compliance report (to verify compliance with categorical pretreatment standards) - must be submitted 90 days after discharge begins

  • periodic compliance report (at least once every six months)

Others may include:

  • compliance schedules and reports

  • notification of potential problems, including slug loading

  • notification of process or pretreatment changes

  • notification of hazardous waste discharges

  • pollutant management plans

  • certifications

  • toxic organic management plans

application/pdfReporting Requirements for Categorical Industrial Users Discharging to Publicly Owned Treatment Works without an Approved Pretreatment Program Adobe Acrobat PDF Document(TCEQ publication RG-401/04)

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Record-Keeping Requirements

Your CIU must retain monitoring records and reports for at least three years, or longer if there is pending litigation. The records need to be available to federal, state, and local government agencies for review and copying. Periodically, the Control Authority may inspect your facility for compliance with pretreatment regulations, including record keeping.

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Where do I Submit the Reports?

Submit the required reports to the agency responsible for regulating the CIU’s wastewater discharges into the POTW.

  • If the POTW has an approved pretreatment program, the CIU is required to submit reports to the local POTW.

  • If the POTW does not have an approved pretreatment program, the CIU is required to report to the TCEQ Pretreatment Program.

    • Through a local ordinance or some other control mechanism, a POTW may also require that the CIU sends a copy of each report to them.

Contact the Pretreatment program if you have questions.

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