Title 33 › CHAPTER 26 — WATER POLLUTION PREVENTION AND CONTROL › SUBCHAPTER III — STANDARDS AND ENFORCEMENT › § 1317
The law requires the EPA to make and keep a list of toxic pollutants and to set limits on how much of those pollutants can be released into water. The EPA had to publish the initial list within 30 days after December 27, 1977, and can add or remove chemicals later. When deciding what to list or what limits to set, the EPA must look at how poisonous a pollutant is, how long it lasts, how it breaks down, whether affected plants or animals live in the water, how important those organisms are, how badly they are harmed, and whether other rules already control the pollutant. The EPA must give at least 60 days for written comments on a proposed standard, hold a public hearing if asked within 30 days, and publish a final standard within 270 days of the proposal. Standards must include a strong margin of safety, be reviewed at least every three years, and take effect within one year unless meeting the date is impossible, in which case the EPA can allow up to three years. The EPA should talk with advisory groups, states, experts, and other federal agencies before publishing rules. The EPA’s decisions are final unless a court finds they were arbitrary or not supported by evidence. The EPA also must set pretreatment rules for pollutants put into public sewage treatment plants. The agency had to propose these rules within 180 days after October 18, 1972, and finalize them within 90 days after proposal. Pretreatment rules must stop pollutants that treatment plants cannot remove or that would harm the plants. They must give up to three years for compliance and be updated as technology changes. New industrial sources that would be covered by new-source rules must have pretreatment rules issued at the same time. After a rule takes effect, it is illegal to operate in violation of it. For existing facilities using a special new treatment system, the sewage plant operator may get up to a 2-year extra compliance time if the EPA agrees the system could be used industrywide and the extra time won’t cause permit violations.
Full Legal Text
Navigation and Navigable Waters, Source: USLM XML via OLRC
Legislative History
Reference
Citation
33 U.S.C. § 1317
Title 33, Navigation and Navigable Waters
Last Updated
Sep 22, 2026
Release point: 119-110