Document ID: chunk:federal_register_of_legislation:F2024C00760:reg:6
Version: federal_register_of_legislation:F2024C00760
Segment Type: reg
Provision Reference: reg 6
Character Range: 632341–633224

6     Dissolved oxygen outside natural ranges                                                       (1) Micro‑organisms consuming organic matter and depleting oxygen at a rate faster than it can be replenished.
                                                                                                         Example: This can arise when there is a discharge from sewage treatment plants or the flushing of natural organic material from the floodplain.
                                                                                                    (2) Bottom release from, or overturn within, a stratified water storage.
                                                                                                    (3) Eutrophication leading to excessive plant growth causing high diurnal variations in dissolved oxygen levels, both above and below natural ranges.