This chart lists all regulated detections in water sampled as part of SUB’s water quality program. If a known health-related contaminant is not listed, it was not detected.
A key to abbreviations and terminology used in this document:
AL or ACTION LEVELS: Concentration of a contaminant which, if exceeded, triggers treatment or other requirements a water system must follow.
Federal Limit or MAXIMUM CONTAMINANT LEVEL: The highest level of a contaminant allowed in drinking water. MCLs are set by the Environmental Protection Agency to be as close to the MCLG as feasible using the best available treatment technology.
Federal Goal or MAXIMUM CONTAMINANT LEVEL GOAL: The level of a contaminant in drinking water below which there is no known or expected risk to health, as set by the Environmental Protection Agency (MCLGs allow for a margin of safety).
LRAA or Locational Running Annual Average: The continual running average from each previous sample site.
MRDL or Maximum Residual Disinfectant Level: The highest level of disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
MRDLG or Maximum Residual Disinfectant Level Goal: The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.
N/A: Not applicable.
ND: Not detected.
NTU or NEPHELOMETRIC TURBIDITY UNITS: Units of measure for turbidity.
pCi/L: Picocuries per liter (a measure of radioactivity)
PPB or PARTS PER BILLION: One pound of contaminant per billion pounds of water.
PPM or PARTS PER MILLION: One pound of contaminant per million pounds of water.
RAA or Running Annual Average: Computed using monthly or quarterly results and is a value used for compliance.
RWD: Rainbow Water District, a wholesale water provider.
TT or TREATMENT TECHNIQUE: A required process intended to reduce the level of a contaminant in drinking water.
TURBIDITY: A measure of the cloudiness of water caused by suspended particles.
UNREGULATED CONTAMINANTS: Contaminants that don’t yet have a drinking water standard set by Environmental Protection Agency (EPA). The purpose of monitoring these is to help EPA decide whether the contaminants should have a standard.
UCMR: Unregulated Contaminants Monitoring Rule
