Permitting Strategies & Reasonable Potential Analysis

Water quality based limitations (WQBLs) are imposed in wastewater permits when it is determined that technology based limitations are not sufficient to protect water quality (40 CFR 125.3). These limitations are based on state and federal water quality standards, as well as the assimilative capacity of the receiving stream.

EPD has developed a number of permitting strategies and reasonable potential analysis procedures to aid in the determination of effluent limitations in NPDES wastewater permits. More information on the development of limitations may be found on the Water Quality Modeling page.

Download this pdf file. NPDES Reasonable Potential Procedures

Specific analyses and strategies are listed below for the following:



Total Residual Chlorine

Whole Effluent Toxicity