LTC 275-2004 Annual Chlorination of Water Supply
CITY OF MIAMI BEACH
Office of the City Manager
Letter to Commission No. 275-2004
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From:
Mayor David Dermer and
Members of the City Commission
Jorge M. GOnZalez~
City Manager
Date: October 20,2004
To:
Subject: ANNUAL CHLORINATION OF WATER SUPPLY
This memorandum is to inform you that the Miami-Dade Water and Sewer Department will
start free chlorine treatment at its regional water plants beginning November 1, 2004
through November 14, 2004. Our residents may experience unusual chlorine taste or odor
in the tap water during this period. However, these temporary conditions will not cause
adverse health effects. This periodic change in chlorine treatment has taken place
annually and will provide additional protection against bacteria.
In addition to Miami-Dade County's public notices published in local newspapers, the City
Administration will announce the free chlorine treatment in Channel 20 and will place a
brief notice in the City's E-Newsletter.
Please f I free to contact me if you have any other concerns or questions.
JMG M\~
c: R bert C. Middaugh, Assistant City Manager
Fred H. Beckmann, Director of Public Works
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FACT SHEET
for the
ANNUAL PRACTICE OF FREE CHLORINE TREATMENT
1983 - 2004
1. The 2004 annual two-week period of free chlorine treatment
begins November I, 2004 and runs through November 14, 2004.
2. The annual free chlorine treatment is required by Miami-Dade
County regulatory agencies: Health Department (Mr. Samir
Elmir) and DERM (Mr. Harvey Kottke) .
3. Free chlorine produces trihalomethanes (THM' s) . Combined
chlorine, as normally applied, greatly reduces the formation
of trihalomethanes.
4. Studies concerning the carcinogenic effect of THM's in
drinking water are based on the consumption of 2 liters
(slightly over 1/2 gallon) of tap water per day for 70 years.
Short periods of exposure to increased levels of THM's should
be of little health significance. Consuming water with
elevated THM levels during this two-week treatment period will
not result in any adverse health effects.
5. Public Notices announcing the "Free Chlorine Treatment Period"
will be published in local newspapers. All hospitals, kidney
dialysis centers and pet shops will be notified individually
by certified mail. Wholesale customers will be similarly
notified by letter.