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class="breadcrumb__item"> <a class="breadcrumb__link" href="/npdes/all-npdes-program-areas">All NPDES Program Areas</a> </li> </ol> </nav> </div> </div> <div class="l-sidebar l-sidebar--reversed"> <div class="l-sidebar__main"> <article class="article" lang="en"> <h1 class="page-title"> National Pretreatment Program </h1> <div class="u-hide-for-print js-toggle-admin-content"> <div data-drupal-messages-fallback class="hidden"></div> </div> <div> <div > <div data-embed-button="paragraphs" data-entity-label="Paragraphs" data-paragraph-id="b7762aa6-c1f2-41c5-bbe6-455db7ffac83" data-paragraph-revision-id="4889" data-langcode="en" data-view-mode="embed" data-entity-embed-display="entity_reference_revisions:entity_reference_revisions_entity_view" data-entity-type="embedded_paragraphs" data-entity-uuid="b7762aa6-c1f2-41c5-bbe6-455db7ffac83" data-entity-embed-display-settings="[]" class="embedded-entity"> <div class="box box--related-info u-align-right"> <h2 class="box__title"> Pretreatment Quick Links </h2> <div class="box__content"> <ul> <li><a href="https://lp.constantcontactpages.com/su/nvNK9pJ/PretreatmentHappenings">Subscribe to Pretreatment Happenings</a> to receive up-to-date information on trainings, news, and more.</li> <li><a data-entity-substitution="canonical" data-entity-type="node" data-entity-uuid="59cffcad-6cd3-4cb5-8ea5-dcd8c0b19822" href="/npdes/national-pretreatment-program-training-and-webinars">Trainings and Webinars</a></li> <li><a data-entity-substitution="canonical" data-entity-type="node" data-entity-uuid="c75ef317-f273-4325-9129-7639a931d160" href="/npdes/national-pretreatment-program-events">Events</a></li> <li><a data-entity-substitution="canonical" data-entity-type="node" data-entity-uuid="d923faca-2734-44b2-8508-80a8c5789651" href="/npdes/npdes-state-pretreatment-program-status-map">Pretreatment Program State Status Map</a></li> <li><a data-entity-substitution="canonical" data-entity-type="node" data-entity-uuid="e27a1481-05ae-42be-b912-a8e9afa565ae" href="/npdes/contact-us-national-pretreatment-program">Contact the National Pretreatment Program</a></li> </ul> </div> </div> </div> <p>The national pretreatment program is a component of the NPDES program. It is a cooperative effort of federal, state, and local environmental regulatory agencies established to protect water quality. Similar to how EPA authorizes the NPDES permit program to state, tribal, and territorial governments to perform permitting, administrative, and enforcement tasks for discharges to surface waters (NPDES program), EPA and authorized NPDES state pretreatment programs approve local municipalities to perform permitting, administrative, and enforcement tasks for discharges into the municipalities’ <span class="definition js-definition"><button class="definition__trigger js-definition__trigger">publicly owned treatment works</button><span class="definition__tooltip js-definition__tooltip" role="tooltip"><dfn class="definition__term">publicly owned treatment works</dfn>A treatment works (as defined by CWA section 212) that is owned by a state or municipality [as defined by CWA section 502(4)]. This definition includes any devices or systems used in the storage, treatment, recycling, and reclamation of municipal sewage or industrial wastes of a liquid nature. It also includes sewers, pipes, or other conveyances only if they convey wastewater to a POTW treatment plant. The term also means the municipality [as defined in CWA section 502(4)] that has jurisdiction over the indirect discharges to and the discharges from such a treatment works. [40 CFR 403.3(q)]</span></span> (POTWs). </p> <div>The national pretreatment program is designed to:</div> <ul> <li>protect POTW infrastructure, and</li> <li>reduce conventional and toxic pollutant levels discharged by industries and other nondomestic wastewater sources into municipal sewer systems and into the environment.</li> </ul> <p> <span class="document"> <a href="https://www.epa.gov/sites/default/files/2015-10/documents/pretreatment_program_intro_2011.pdf" class="file"> <svg class="icon file__icon is-spaced-after" aria-hidden="true"><use href="/themes/epa_theme/images/sprite.artifact.svg#file" /></svg>Introduction to the National Pretreatment Program (pdf)</a> <span class="document__meta">(1.92 MB) </span></span>  - Summary of the national pretreatment program.</p> <hr> </div> </div> <div class="usa-section"> <div class="l-constrain"> <div class="l-grid l-grid--2-col l-column-layout"> <div> <div class="box"> <div class="box__content"> <h2>National Pretreatment Program Basics</h2> <ul> <li><a href="/npdes/national-pretreatment-program-overview">Overview</a></li> <li><a href="/npdes/national-pretreatment-program-implementation">Implementation</a></li> <li><a href="/npdes/national-pretreatment-program-regulatory-history">Regulatory History</a></li> <li><a href="/npdes/other-federal-laws-and-regulations-apply-national-pretreatment-program">Other Federal Laws and Regulations</a></li> <li><a href="/npdes/national-pretreatment-program-additional-information">Additional Information</a></li> </ul> </div> </div> </div> <div> <div class="box"> <div class="box__content"> <h2>Pretreatment<br> Standards and<br> Requirements</h2> <ul> <li><a href="/npdes/pretreatment-standards-and-requirements-applicability">Applicability</a></li> <li><a href="/npdes/pretreatment-standards-and-requirements-general-and-specific-prohibitions">General and Specific Prohibitions</a></li> <li><a href="/npdes/pretreatment-standards-and-requirements-categorical-pretreatment-standards">Categorical Pretreatment Standards</a></li> <li><a href="/npdes/pretreatment-standards-and-requirements-local-limits">Local Limits</a></li> </ul> </div> </div> </div> </div> </div> </div> <div class="usa-section"> <div class="l-constrain"> <div class="l-grid l-grid--2-col l-column-layout"> <div> <div class="box"> <div class="box__content"> <h2>Pretreatment<br> Roles<br> and<br> Responsibilities</h2> <ul> <li><a href="/npdes/pretreatment-roles-and-responsibilities">Summary</a></li> <li><a href="/npdes/pretreatment-roles-and-responsibilities-approval-authorities">Approval Authorities</a></li> <li><a href="/npdes/pretreatment-roles-and-responsibilities-control-authorities">Control Authorities</a></li> <li><a href="/npdes/pretreatment-roles-and-responsibilities-industrial-users">Industrial Authorities</a></li> </ul> </div> </div> </div> <div> <div class="box"> <div class="box__content"> <h2>Program Events,<br> Training and Webinars, and<br> Publications</h2> <ul> <li><a href="/npdes/national-pretreatment-program-events">Events</a></li> <li><a href="/npdes/national-pretreatment-program-training-and-webinars">Training and Webinars</a></li> <li><a href="/npdes/national-pretreatment-program-publications">Publications</a></li> </ul> </div> </div> </div> </div> </div> </div> </article> </div> <div class="l-sidebar__sidebar"> <div class="menu-sidenav__overlay"></div> <div id="block-webareamenu" class="block--web-area-menu block"> <h2 class="block__title"><a href="/npdes" hreflang="en">National Pollutant Discharge Elimination System (NPDES)</a></h2> <div class="block__content"> <button type="button" class="usa-button usa-button--outline web-area-menu__button" id="web-area-menu__button" aria-label="toggle the side navigation menu"> <svg class="usa-icon menu-button--open" aria-hidden="true" role="img"><title>Open Sidenav Menu</title><use 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