Definitions:

RUNOFF: Non-storm related, dryweather runoff
STORM: Storm related, wet-weather runoff
AGRICULTURAL: Agricultural runoff
ALGAE: Algae Sources
BOAT: Boat discharge
CAFO: Concentrated animal feeding operation
CSO: Combined sewer overflow
SSO: Sanitary sewer overflow
POTW: Pubicly-owned treatment works
SEWER LINE: Sewer line leak, blockage, or break
SEPTIC: Septic system leakage
WILDLIFE: Wildlife pollution
OTHER: Other source known but not listed above
UNKNOWN: Source exists but unidentified
E.COLI: The name of a microbiological indicator used in freshwater quality sampling to indicate possible fecal contamination.
PREEMPT: An abbreviation of “preemptory action” (advisory/closure) that some jurisdictions issue to inform the public of possible fecal contamination,
issued based on past experience, prior to receiving from the laboratory a confirming water quality sample.
ELEV_BACT (elevated bacteria – confirmed by a water quality sample)
ENTERO: ENTERO stands for enterococci (an indicator bacterium used in water quality sampling).