Monday, February 17, 2025, 3:51 AM
Site: Pa. DEP Operator eLearning Center
Course: Pa. DEP Operator eLearning Center (PADEP)
Glossary: Course Glossary
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N/A Site - Buildings that are not used by a LSL and do not contain lead pipes or copper pipes with lead solder
- Building containing copper plumbing materials (lead-free solder) installed after January 6, 1991
- (LCR13) LCR Planning Tools for NTNCWS (2537)
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National Pollutant Discharge Elimination System National Pollutant Discharge Elimination System (NPDES)
- (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)
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National Primary Drinking Water Regulations National Primary Drinking Water Regulations (NPDWR)
NPDWRs (or primary standards) are legally enforceable standards that apply to public water systems.
- (PNR10) Public Notification – An Introduction for NCWSs (2332)
- (PNR11) Public Notification – Violations and Tiers for NCWSs (2333)
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Natural Organic Matter Natural Organic Matter (NOM) - Organic matter that exists naturally in the water environment.
- (DBP01) DBP Rule – Overview (1282)
- (DBP02) DBP Rule Monitoring and Reporting – Job Aids (1283)
- (DBP10) DBP Rule Monitoring and Reporting for Chlorine⁄Chloramines (1284)
- (DBP13) DBP Rule Monitoring and Reporting for TTHM⁄HAA5 (1285)
- (DBP40) Enhanced Coagulation – Basics (1280)
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Natural Radiologicals Naturally occurring radiological contaminants including gross alpha, radium-226, radium-228, and uranium.
- (RAD01) Radionuclide Rule – Initial Monitoring and Reporting (1503)
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nBOD Nitrogenous BOD (biochemical oxygen demand) - The stage of decomposition that occurs in biological treatment processes when specialized aerobic bacteria (nitrifiers), use DO to change ammonia to nitrate; sometimes referred to as second-stage BOD.
- (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)
- (BNR02) Nitrification Factors – Suspended Growth Treatment Systems (1821)
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NCWS NCWS - Noncommunity Water System
- A public water system that is not a community water system
- (DBP15) DBP Rule – Maintaining Compliance for Pa. PWSs using Chlorine/Chloramines (1570)
- A public water system that is not a community water system. Noncommunity water systems are further categorized as nontransient and transient water systems.
- (PNR01) Public Notification – An Introduction for NCWSs (2332)
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Nitrification - An aerobic process in which specialized bacteria (such as Nitrosomonas and Nitrobacter) change the ammonia and organic nitrogen in wastewater into oxidized nitrogen (usually nitrate).
- (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)
- (BNR02) Nitrification Factors – Suspended Growth Treatment Systems (1821)
- Biological oxidation of ammonium to nitrite and nitrate, or a biologically induced increase in the oxidation state of nitrogen.
- (BIO01) Biosolids Agronomic Loading Rates Part 1 (1247)
- (BIO02) Biosolids Agronomic Loading Rates Part 2 – Manure (1484)

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Nitrifiers Specialized bacteria (such as Nitrosomonas and Nitrobacter) that change ammonia and organic nitrogen in wastewater, into oxidized nitrogen (usually nitrate).
- (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)
- (BNR02) Nitrification Factors – Suspended Growth Treatment Systems (1821)
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Nitrifying Bacteria Also known as nitrifiers
Specialized bacteria (such as Nitrosomonas and Nitrobacter) that change ammonia and organic nitrogen in wastewater, into oxidized nitrogen (usually nitrate).
- (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)
- (BNR02) Nitrification Factors – Suspended Growth Treatment Systems (1821)
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