ALEC	Arizona Laboratory for Emerging Contaminants
As	arsenic
CC16	club cell secretory protein
COPD	chronic obstructive pulmonary disorder
DF	detection frequency
DMA	dimethylarsinate
ELISA	enzyme-linked immunosorbent assay
HPLC	high performance liquid chromatography
ICP-MS	inductively coupled plasma mass spectrometry
LOD	limit of detection
MCL	maximum contaminant level
MESH	Metals Exposure Study in Homes
MMA	methylarsonate
NTU	Nephelometric Turbidity Unit
OR	odds ratio
US	United States
US EPA	United States Environmental Protection Agency