Utilities Developing Implementing Guidance For EPA Ammonia Criteria

A group representing publicly owned treatment works (POTWs) is developing guidance for wastewater utilities faced with meeting EPA's strict 2013 aquatic life water quality criteria for ammonia, especially lagoon-based systems that may find it harder to meet discharge limits than systems that use more advanced technology. In particular, the guidance will address how to calculate permit limits for waters that lack certain species of mussels, which the criteria are designed to protect, a source with the National Association of Clean...