Works & Utilities
John A. Buckley Surface Water Treatment Plant can produce 20
million gallons of drinking water per day. The facility also
employs an innovative treatment process that makes possible very
rapid adjustments to changing source water conditions.
new treatment process also allows Melbourne to meet evolving state
and federal regulations.
chemical coagulant is added to the raw water as it enters a coagulation tank.
The coagulant destabilizes the suspended solids and with proper mixing early
stage floc formation begins. The coagulated water then flows over a weir
into the injection tank where polymer and microsand are added to further enhance
floc formation. Next, the water passes through the underflow passage into
the maturation tank where the majority of ballasted floc formation occurs.
After the water leaves the maturation tank, it enters the settling tank where
the floc rapidly settles and is removed from the treated water via lamellar
settling. Clarified water exits the system via a series of collection
troughs or weirs for subsequent filtration, disinfection and delivery to the
Located nearby is the
Joe Mullins Reverse
Osmosis Water Treatment Plant, which utilizes well water and can
produce up to 6.5 million gallons of water per day. The average daily demand on the drinking water system is 15.5
million gallons as water is distributed to Melbourne and most
Water Source: Lake Washington
Lake Water Analysis
Total Hardness: 94
Temperature: 75 degrees Fahrenheit
Distribution Entry Point Analysis
Total Hardness: 77
Water Hardness LevelsThe hardness of the water
produced by the City of Melbourne averages 85 mg/L or 5 grains per
American Water Works Association has developed a generalized
water hardness scale that rates very soft water as between 0 and 25
mg/L, soft water as between 25 and 75 mg/L, moderately hard as
between 75 and 150 mg/L, hard water as being between 150 and 300
mg/L, and very hard water as being above 300 mg/L.
The hardness level after softening should not fall below
50 mg/L, or three grains per gallon. To convert milligrams
per liter to grains per gallon multiply by 0.06.
Adjusting for Softer Water
If your home water softening system is causing
the water to become too soft, leaching of copper pipes in
your home plumbing could occur, which would result in sinks
and tubs developing a green or blue coloration.
Those with water softeners should monitor results. Very excessive softening could cause corrosion
of your plumbing, which would allow copper to enter your
home’s water supply.
Copper is an essential nutrient required by the body in very
small amounts, too much copper can potentially cause adverse
health effects. Water delivered by Melbourne contains trace
copper amounts that are below the level determined as safe
by the federal Environmental
A second phase is set to begin
construction in early 2006. The
$15.1-million second phase will reduce the use of chlorine
for disinfection purposes by using ozonation, with benefits including greater
control of taste and odor. This
project will not affect water customer rates, since the
current rate structure provides funding.
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