Industrial Pretreatment Coordinator Handbook

Why the Pretreatment Program Map Matters

Which part of your industrial pretreatment program tells you what to do when a new manufacturer discharges a solvent, changes production, or misses a sampling deadline?

If the answer depends on searching through separate permits, inspection files, ordinances, laboratory reports, and enforcement records, the program needs a clear operating map. A municipal pretreatment coordinator must connect regulatory requirements to daily work. The coordinator identifies industrial users, determines which requirements apply, issues and maintains permits, reviews monitoring data, inspects facilities, responds to violations, and protects the publicly owned treatment works (POTW) from interference, pass-through, worker hazards, and damage.

The Pretreatment Program Map solves one practical problem: it shows how each program element supports the next. After working through it, you should be able to explain your program’s regulatory structure, assign responsibility for each core task, trace a discharge from its source to the treatment plant, and identify the records that prove the program works. Ask yourself: if a treatment plant operator reports a sudden pH upset at 2:00 a.m., can you quickly identify the likely industrial sources, their permit limits, their recent results, and the required response?

Building the Pretreatment Program Map

The Pretreatment Program Map begins with the legal foundation and moves toward field decisions. The federal Clean Water Act establishes the national water pollution control framework. The Environmental Protection Agency (EPA) administers the national pretreatment regulations, while an approved state program may carry out oversight. Your municipality operates the local industrial pretreatment program under an approved framework, local sewer-use ordinance, permits, procedures, and enforcement authority.

The map does not replace those documents. It connects them. Start with the source of authority, then follow the path from industrial user to sewer, treatment plant, receiving water, and compliance record. Use these six parts:

1. Authority. Identify the federal regulations, state requirements, approved program documents, and local sewer-use ordinance that give the program its authority. The ordinance must support inspections, sampling, records access, reporting, limits, and enforcement. If the ordinance lacks a needed authority, staff may struggle to act when a facility refuses access or violates a permit condition.

2. Industrial user inventory. Maintain a current list of every nondomestic discharger, not only facilities that already hold significant industrial user status. A significant industrial user (SIU) generally includes a categorical industrial user subject to federal discharge standards or a facility that meets defined flow, loading, or compliance criteria. Track facility name, address, contacts, processes, discharge points, pretreatment equipment, applicable categories, and permit status. A current inventory prevents missed inspections and helps explain unusual plant loading.

3. Characterization and classification. Determine what each facility discharges and which requirements apply. Review process descriptions, chemical inventories, safety data sheets, production changes, water use, sampling results, and discharge locations. Compare the information with prohibited discharge standards, categorical standards, local limits, and permit conditions. Do not classify a facility from its business name alone. A metal finishing facility and a metal parts warehouse may have very different wastewater risks.

4. Control documents. Issue permits or other enforceable requirements that translate the applicable rules into facility-specific limits, monitoring points, sampling schedules, reporting duties, and operating conditions. A permit should identify where the facility samples, which parameters it analyzes, how often it reports, and what happens after a violation. Clear conditions reduce arguments about what the facility must do.

5. Verification and response. Use inspections, sampling, self-monitoring reports, facility notifications, and treatment plant information to verify compliance. Compare results with limits, check whether the sample location represents the regulated discharge, and review whether the facility met reporting deadlines. When results show a violation, document the facts, determine the cause, require correction, and apply enforcement according to your procedures. The response should match the violation’s risk and history.

6. Records and oversight. Preserve the evidence that supports each decision. Keep permits, inspection reports, laboratory data, chain-of-custody records, correspondence, calculations, enforcement documents, and annual reports in a retrievable system. Program oversight depends on more than good field work; the file must show what staff knew, when they knew it, and why they acted.

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