What Are the Ground Water Source Microbial Monitoring Requirements?
Triggered source water monitoring is used to determine if fecal contamination is present in a ground water source/well. A GWS must conduct triggered source water monitoring if: • The GWS does not provide FDEP-approved four-log virus treatment for each ground water source/well; and • The GWS is notified that a routine distribution system sample is total-coliform-positive (TC+). When conducting triggered source water monitoring: • The GWS must collect at least one source sample per TC+ sample from each ground water source/well in use at the time the TC+ sample was collected • These initial triggered source water samples must be collected within 24 hours of notification of the TC+ routine distribution system sample (s) at a location prior to any treatment • The samples must be analyzed for one of the following three fecal indicators: E. coli, enterococci, or coliphage. If an initial triggered source water sample is fecal-indicator-positive (FI+): • The GWS must collect five additional sou
