ABBREVIATIONS

  ppm

  Parts per million=mg/l

  ppb

  Parts per billion=ug/l

  MCL

  Maximum contaminant level

  NTU

  Nephelometric turbidity unit

  CFU

  Colony forming unit

  pCi/l

  Picocuries per liter

  MFL

  Million fibers per liter, >10 micron

  + sample

  Positive sample

  ND

  Not detected

  TON

  Threshold odor number

  LI

  Langlier Index

  SDWA

  Safe Drink Water Act

  >

  Greater than

  <

  Less than (also means “not detected”)