Pa. DEP Operator eLearning Center

1. Buildings that are not used by a LSL and do not contain lead pipes or copper pipes with lead solder
2. Building containing copper plumbing materials (lead-free solder) installed after January 6, 1991

• (LCR13) LCR Planning Tools for NTNCWS (2537)

National Pollutant Discharge Elimination System (NPDES)

• (BNR01) Nitrification and Denitrification – An Introduction to Nitrogen Removal (1485)

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)

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)

Naturally occurring radiological contaminants including gross alpha, radium-226, radium-228, and uranium.

• (RAD01) Radionuclide Rule – Initial Monitoring and Reporting (1503)

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)

NCWS - Noncommunity Water System

1. A public water system that is not a community water system
   • (DBP15) DBP Rule – Maintaining Compliance for Pa. PWSs using Chlorine/Chloramines (1570)
2. 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)

1. 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)
2. 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)

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)

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)