This checklist will help facility managers evaluate the appropriateness of
water-saving adjustments for improving the efficiency of schools or colleges.
Remember, water savings often bring energy savings, too.
Bathrooms & Restrooms
Domestic water use accounts for an average 28% of the water use in most
schools.
Repair Leaks! A leaking toilet can waste more than 50 gallons of water
each day and a dripping faucet or showerhead can waste up to 1,000 gallons
per week!
Showerheads, faucets and toilets that must be replaced due to normal
wear-and-tear should be replaced with low-volume models, which are widely
available.
Low-volume showerheads use only 2 gallons of water each minute; older
models may use as much as 3 gallons per minute.
Replace faucets that use as much as 2.5 gallons per minute with those
which use only 1.5. In most cases, low-volume faucet aerators can be
installed when the entire faucet does not need replacing.
Water use in toilets can be reduced by:
Installing toilet tank, water displacement devices, such as toilet dams,
bags, or weighted bottles.
Retrofitting flushometer (tank-less) toilets with water-savings
diaphragms, which save one gallon (20%) per flush.
Replacing toilets with low-volume models. Toilets can use as much as 4.5
gallons per flush, while low-volume toilets use only 1.6 gallons per flush.
An average savings of about 14% of the total water use in schools is
possible through this one water conservation action.
These water efficiency suggestions are more than just a good idea. Low-volume
water fixtures are also required by most local building codes.
Building Maintenance
General
Check the water supply system for leaks, and turn off unnecessary flows.
Shut off the water supply to equipment and areas that are unused.
Discontinue water circulation pumping in areas not in use.
Read water meters monthly. Compare the readings to those taken in the same
month of the previous year. This will help to identify leaks as they occur,
as well as monitor conservation efforts.
Check the pressure. Where system pressure is higher than 60 psi, install
pressure-reducing valves.
Consider using water-efficient ice machines.
Heating/Cooling
Cooling accounts for about 14% on average, of the water use in a school.
Reduce excessive blowdown! Many cooling towers operate below the suggested
levels of total dissolved solids (TDS) unnecessarily. Adjust boiler and cooling
tower blowdown rate to maintain TDS at levels recommended by manufacturers'
specifications.
Consider using ozone as a cooling tower treatment to reduce water used for
make-up.
Shut off water-cooled air conditioning units when not needed, or replace
water-cooled equipment with air-cooled systems.
Cleaning
Instruct cleaning crews to use water efficiently for mopping.
Switch from "wet" carpet cleaning methods, such as steam, to
"dry," powder methods.
Change window cleaning schedule from "periodic" to "as
required."
Swimming Pools
Lower pool level to avoid splash-out. Water that is unavoidably splashed-out can
be channeled onto the landscape or back into the pool.
Reduce the water used to back-flush pool filters.
Use a pool cover to reduce evaporation and heat loss when the pool is not being
used.
Kitchen
An average of 5% of the water used in schools is used in kitchen areas.
Slow the flow!
Turn off the continuous flow used to wash the drain trays of the
coffee/milk/soda beverage island. Clean thoroughly as needed.
Adjust ice machines to dispense less ice if ice is being wasted.
Presoak utensils and dishes in basins of water, rather than in running
water.
Replace automatic shut-off spray nozzles, which can use as much as 4.5
gallons of water each minute, with low-volume nozzles using 2.0 gallons per
minute.
Turn off food preparation faucets that are not in use. Consider installing
foot triggers.
Do not allow water to flow unnecessarily. Consider using automatic
shut-off faucets at bar sinks.
Dishwasher Hints
Wash only full loads in the dishwashers.
Replace the spray heads to reduce flow.
Turn dishwashers off when dishes are not being processed.
Reuse the rinse water from the dishwasher as flush water in garbage
disposal units.
Outdoor Water Use
Landscaping
Apply water, fertilizer, or pesticides to your landscape only when needed.
Look for signs of wilt before watering established plants.
Water early in the morning or in the evening when wind and evaporation are
lowest.
Install an automatic rain shut-off device on sprinkler
systems.
Consider using low-volume irrigation, such as a drip system.
Avoid runoff! Make sure sprinklers are directing water to landscape areas,
and not to parking lots, sidewalks, or other paved areas.
Adjust the irrigation schedule for seasonal changes. Sprinklers generally
do not have to be run as often in cooler weather, or during the rainy
season.
Use mulch around landscape plants to reduce evaporation and weed growth.
Consider using drought-tolerant, low-maintenance plants.
General
Be sure all hoses have shut-off nozzles.
Use a broom, rather than a hose, to clear sidewalks,
driveways, loading docks and parking lots.
Wash vehicles only when needed.
Investigate the availability of reclaimed water for
irrigation and other approved uses.
Make it a Policy
Educate employees and students about the importance and benefits of water
conservation.
Create water conservation suggestion boxes, and place them in prominent
areas.
Install signs in restrooms and cafeterias, which encourage water
conservation.
Assign an employee, or a student, to evaluate water conservation
opportunities and effectiveness.
Any retrofitting and/or plumbing changes to facilities must be consistent
with regulatory agencies. Check with the appropriate agencies before making
changes.
Schools use an average of 22,284 gallons
per day (GPD) of water.
Types of
Water Uses
Average Water Use
(% of total)
Potential Savings
(% of total)
Irrigation
47
13
Domestic
31
8
Cooling
13
1
Kitchen
5
--
Cleaning
1
--
Other
3
--
TOTALS
100% 22,284 gpd
22% 4,902
Source: ICI Conservation in the Tri-County Area of the SWFWMD. SWFWMD,
November 1997.
