Wastewater, also referred to as sewage, includes water from residential, commercial and industrial use. The National Pollution Discharge Elimination System (NPDES) was created by the EPA under the Clean Water Act of 1972. The NPDES issues wastewater permits, which specify both the volume and the degree of allowable pollution that can be discharged into the immediate environment. The exact limits are based on the health of the receiving water system. An important step in mitigating or predicting hazardous pollution is to monitor and decrease the amount of wastewater dumped into aquatic habitats.  

Dissolved oxygen is an important parameter in the water treatment process. PME’s miniDOT loggers enable real-time measurements of dissolved oxygen. PME Cyclops-7 and C-FLUOR loggers utilize Turner Designs sensors that detect wastewater in mixed water systems. The wastewater treatment process removes containments, but optical brighteners and tryptophan are measurable proxy indicators of wastewater contamination.