A new decision curtails agency discretion to approve total maximum daily loads for impaired waterbodies and sets a precedent that may lead to more stringent National Pollution Discharge Elimination System (NPDES) permit limits.
Total maximum daily loads (TMDLs) have been described as “pollution budgets” for impaired waterbodies. A permitting authority developing a TMDL typically considers all known sources of the pollutant at issue (including contributions from point and non-point sources) as well as the relevant…
Everyone can agree that environmental assessments should be based on the best science. The “best” science, however, is an ever-advancing standard. Despite budget uncertainties and other hurdles, EPA scientists often pioneer new methods of assessment capable of detecting smaller and smaller increments of environmental impact. Although it may take years for EPA to develop and demonstrate a new method, stakeholders may benefit from paying attention to the development process and seeking opportunities to participate in…
