Versions of 40 CFR Part 129 - Toxic Pollutant Effluent Standards on LawServer 2024 40 CFR Part 129 – Toxic Pollutant Effluent Standards 2023 40 CFR PART 129 – TOXIC POLLUTANT EFFLUENT STANDARDS 2022 40 CFR Part 129 – Toxic Pollutant Effluent Standards 2021 40 CFR Part 129 – Toxic Pollutant Effluent Standards 2020 40 CFR Part 129 – Toxic Pollutant Effluent Standards