CCR   Consumer Confidence Report

CWS   Community Water System

DBP   Disinfection Byproduct

EPA   Environmental Protection Agency

GWR   Ground Water Rule

HPC   Heterotrophic Plate Count

IESWTR   Interim Enhanced Surface Water Treatment Rule

IOC   Inorganic Chemical

LCR   Lead and Copper Rule

MCL   Maximum Contaminant Level

MCLG   Maximum Contaminant Level Goal

MRDL   Maximum Residual Disinfectant Level

MRDLG   Maximum Residual Disinfectant Level Goal

NCWS   Non-Community Water System

NPDWR   National Primary Drinking Water Regulation

NTNCWS   Non-Transient Non-Community Water System

NTU   Nephelometric Turbidity Unit

OGWDW   Office of Ground Water and Drinking Water

OW   Office of Water

PN   Public Notification

PWS   Public Water System

SDWA   Safe Drinking Water Act

SMCL   Secondary Maximum Contaminant Level

SOC   Synthetic Organic Chemical

SWTR   Surface Water Treatment Rule

TCR   Total Coliform Rule

TT   Treatment Technique

TWS   Transient Non-Community Water System

VOC   Volatile Organic Chemical

[65 FR 26035, May 4, 2000, as amended at 71 FR 65653, Nov. 8, 2006]