Population: 99,400. This is the equivalent residential population served including non-bill paying customers.
90th Percentile: For lead and copper testing. 10% of test results are above this level and 90% are below.
AL: Action level or the concentration of a contaminant which when exceeded, triggers treatment or other requirements that a water system must follow.
HAA5: Haloacetic Acids (mono-, di- and tri-chloroacetic acid and mono- and di- bromoacetic acid) as a group.
LRAA: Locational Running Annual Average or the locational average of sample analytical results for samples taken during the previous four calendar quarters.
MCLG: Maximum Contaminant Level Goal or the level of a contaminant in drinking water below which there are no known or expected health risks&. MCLGs allow for a margin of safety.
MCL: Maximum Contaminant Level or the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment.
N/A: Not Applicable.
ND: Not Detectable at testing limits.
NTU: Nephelometric Turbidity Unit used to measure cloudiness in drinking water.
PPB: Parts per Billion or micrograms per liter.
PPM: Parts per Million or milligrams per liter.
RAA: Running Annual Average or the average of sample analytical results for samples taken during the previous four calendar quarters.
Range of Results: Shows the lowest and highest levels found during a testing period. If only one sample was taken, this number equals the Highest Test Result or Highest Value.
SMCL: Secondary Maximum Contaminant Level or the secondary standards that are non-enforceable guidelines for contaminants, may cause cosmetic effects (such as skin or tooth discoloration) or aesthetic effects (such as taste, odor or color) in drinking water. EPA recommends these standards but does not require water systems to comply.
TT: Treatment Technique or a required process intended to reduce the level of a contaminant in drinking water.
TTHM: Total Trihalomethanes (chloroform, bromodichloromethane, dibromochloromethane and bromoform) as a group.