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Stage 1 Disinfectant/Disinfection Byproducts
Disinfection Byproducts (DBPs)
are chemicals formed as a result of the reaction between chlorine
added to the water (for disinfection) and naturally occurring
organic material already present in the water.
62-550.514, Florida Administrative Code requires public water
systems adding a chemical disinfectant to their water to comply with
the requirements of 40 CFR 141, subpart L.
Suppliers of water must monitor:
a. Required of systems with a
population of 4,901 and greater:
i. A Disinfectant Residual
Report must be submitted quarterly. Data for this report
must be obtained from the same location and with the same
frequency as compliance bacteriological sampling.
ii. It is important to only
report disinfectant residuals from compliance samples and
not from any other kind of bacteriological sample.
2. Stage 1 Disinfection Byproducts
a. The first step to meeting this requirement
is to complete
Byproducts Rule Monitoring Plan and have the Plan available
for review during Department sanitary survey inspections and
b. Completion of this form
will require the designation of a maximum residence time (MRT)
location for each water treatment plant that serves the water
system. This is a place in the distribution system where the
water will have been in the distribution system for the longest
c. Complete your regular
sampling for Total Trihalomethanes and Haloacetic Acids Five (TTHMs/HAA5s),
either quarterly, annually, or triennially in accordance with
d. Systems with a population
of 10,000 or greater must submit a Disinfectant Byproduct Report
quarterly, or annually, depending on sampling frequency. This
report will indicate current DBP averages.
e. Systems which ozonate must
test for Bromate monthly (point of entry sample).
f. Total Organic Carbon (TOC) and alkalinity monitoring is required monthly to
demonstrate compliance with the treatment technique requirements
for surface water systems that are using conventional filtration
Drinking Water Section
3319 Maguire Blvd.,
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