NPDES 2025/2026 Exam – A+ Rated Guide with 80+ Questions on Permits, EPA Compliance, Monitoring Systems, pH Ranges & Effluent Limits

This updated NPDES exam guide for 2025/2026 provides 80+ verified questions and answers focused on wastewater discharge regulations, system monitoring, and permit compliance. Topics include NPDES enforcement under the Clean Water Act, Illinois EPA authority, effluent parameters, TSS/BOD limits, pH requirements, chlorination impacts, and oil & grease discharge levels. Detailed system monitoring coverage includes CWBD, ST, TR, WM, CROP, and WX release systems. An essential study resource for wastewater operators, industrial facility compliance officers, and students preparing for EPA or state NPDES certification exams. Keywords: NPDES compliance, effluent limits, pH monitoring, Illinois EPA, CWBD system, TSS and BOD limits, TR system, wastewater discharge, stormwater permits, CROP overflow, Clean Water Act, permit violation consequences, discharge monitoring, oil and grease limits, permit suspension, ST system, WM system, environmental compliance