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What to expect from the Site Visit:

Green Business staff will go over the water conservation portion of the checklist with you and walk through the property to verify items checked off on your checklist. This may require speaking with other building personnel.

During the site visit, our staff may need you to:

  1. Note how and where your business uses water (i.e., Toilet flushing, dishwashing, showers, ice machines, cooling towers, irrigation, etc.)
  2. Determine flow rates on all fixtures and devices.
  3. If you pay your own water bill, take inventory of your water history and past plumbing maintenance, noting the average monthly cost and usage per person.
  4. If you are a tenant of the building, discuss your goals with the owners/property managers. Be prepared to meet with the manager and building engineer to discuss factors affecting the property's water usage.
  5. Compile and review any maintenance reports from outside agencies that service water-related process equipment (e.g., tunnel washers, icemakers, cooling towers).

Please use the following resources to help your business implement and meet the San Francisco Green Business Program water conservation standards.

  1. Toilets
  2. Urinals
  3. Faucet Aerators and Showerheads
  4. Dishwashers
  5. High Efficiency Clothes Washers
  6. Ice Machines
  7. Pre-Rinse Spray Valves
  8. Learn How To Read Your Water Meter
  9. Detect Leaks
  10. Water Pressure
  11. Water-Efficient Landscaping


      1. gpftoiletsToilets All San Francisco Green Businesses that upgrade their toilets must use toilets with 1.28 gallons per flush (gpf) volume, although currently installed toilets with 1.6 gpf or less are acceptable. ULFTs and HETs are approved for use. Visit SFPUC for financial incentives for installing qualifying toilets.
        • ULFT's: In 1994 new water conserving toilets, called ultra-low-flush toilets (ULFT's) were required in all new construction. ULFT's use 1.6 gallons per flush and are much more water efficient than older toilets, which use up to 7 gallons per flush. Each installed ULFT can save a typical family 70 gallons a day in water use. A number of commercial ULFTs are available in a range of designs that have 1.6 gallons per flush. The efficiency of a Flushometer and bowl combination toilet depends mainly upon the regular maintenance of the flushometer valve. 
        • HET's: High-Efficiency toilets (HET) are now the standard and flush at least 20% below the US maximum of 1.6 gpf, equating to 1.28 gpf or less. Many HET's are dual-flush toilets, which have two separate flush volume options, a half flush (.8 gallons) and a full flush (1.6 gallons). There are several industrial flushometer HET's on the market, and over a dozen have passed performance standards set by the CUWCC (California Urban Water Conservation Council). uppercut
        • Dual-flush handle retrofit for flushvalves: This water saving mechanism retrofits to most existing valves and reduces water volume by up to 30% when activated for half-flush.
      2. Urinals Replace all urinals flushing at greater than 1.0 gallons with urinals flushing at less than 0.5 gallons, or waterless urinals.
        • gpfurinalHEUs: High-Efficiency Urinals (HEUs) are defined as fixtures that function at 0.5-gpf or less. Based on data from studies of actual usage, these urinals save 20,000 gallons of water per year with an estimated 20-year life. For more information about HET's and HEU's, where you can buy them, and current rebates, contact the SFPUC Water Conservation Section
        • Urinal retrofit kit: The flush volume in typical 1.0 gallon per flush urinals can be retrofitted with a .5 gpf diaphram kit. This is a great cost-effective way to turn the ultra-low flush urinal into a high-efficiency urinal for around $50 a fixture. 
        • For more information about HET's and HEU's, where you can buy them, and current rebates, visit the SFPUC Urinal rebate section.
      3. Faucet Aerators and low-flow-showerheadLow-Flow Shower Heads: Installing faucet aerators and low-flow showerheads is one of the most effective water conservation method you can use for your home or office. These fixtures are required for Green Business applicants. SFPUC provides free high-efficiency showerheads and faucet aerators to commercial and residential customers. 
        • 1.5-kitchen-faucet-aeratorFaucet Aerators: Standard aerators are devices that are designed to reduce the flow of the water coming out of the faucet while introducing air into the water flow. That is why they are called "aerators". Water has to pass through very small holes and spreads out to cover more surface. If an aerator is already installed on your faucet, it will usually have its rated flow (in gallons per minute or gpm) imprinted on the side. If there appears to be an aerator installed, but there is no flow rate stamped on the side, the aerator may not be a low flow type and should be replaced with a new one. For restroom faucets, the flow rate should be 0.5 gpm or less, and for kitchen faucets and shower heads, the flow rate should be 1.5 gpm or less. If no aerator is visible, check to see if there are threads just inside the tip of the faucet. Most modern faucets are threaded to accept aerators. 
        • aerated-flowlaminar-flowSome designer faucets have an internal built in "laminar" restrictor. Laminar restrictors work differently than standard faucet aerators by producing dozens of parallel streams of water. You can ask the manufacturer for the flow rate of these faucets or Green Business Program staff can help you measure the flow rate of your unstamped faucet aerators. 
        • tamper-proof-faucet-aerators If your faucets are not threaded for aerators, installing Flow Control Valves or Flow Regulator devices are the best option for reducing flow rates since the flow can be varied to fit the function. Located under the sink, flow control valves go undetected by the faucet user. They cost about $20 a pair, pricing reduces with bulk purchasing.
        • If your aerators keep suddenly disappearing, tamper proof aerators are a great alternative. Inexpensive and simple to install, low-flow showerheads and faucet aerators can reduce water consumption and also energy cost associated with heating water by as much as 50%.
      4. dishwasherDishwashers use at least two times less water than washing by hand. If you are looking to purchase a new, efficient dishwasher, please visit the link below. 
        • Commercial dishwashers are now using less than 3 gallons per cycle. For commercial dishwashers, visit the Food Service Technology Center ( for water and energy efficient models. Be sure to look for Energy Star rated appliances.
      5. High Efficiency Clothes Washers (HECWs) utilize technological advances to deliver excellent wash performance while saving both water and energy. Resource efficient models use 35-50% less water and approximately 50% less energy. The water efficiency of clothes washers is rated using the term "water factor" to describe and compare its water use. Water factor is measured by the quantity of water (gallons) used to wash each cubic foot of laundry. A lower water factor represents greater water and energy efficiency.
        • Go to for more information on high efficiency clothes washers and current rebates offered through SFPUC.
      6. Ice Machines Water-cooled ice machines use far more water and energy than air-cooled models.
        • Various retrofit options for water-cooled ice machines can be found on the Food Service Technology Center website
      7. pre-rinse-spray-valvesPre-Rinse Spray Valves A low-flow pre-rinse spray valve is one of the easiest and most cost effective energy saving devices available to the foodservice operator. In addition to minimizing water consumption, water heating energy and sewer charges are also reduced. Pre-rinse spray valves can use as little as .65 gallons per minute compared with older models that use 3 or more gallons per minute.
      8. figure-1Learn How To Read Your Water Meter There are several reasons why your business should be able to locate and read your water meter. By reading your meter at the beginning and the end of the day you can determine how much water your business has used. You can also use the reading to check for leaks. For instance, if you turn off all the taps on the property and see that the meter is still turning, this may indicate a leak. Here are some hints to help you find and read your water meter:
        • Locate Your Meter - Your water meter is generally located near the curb in front of your home or place of business in a direct line with the main outside faucet. Some water meters in commercial properties are located in the basement under the sidewalk of the property. Water meters are usually housed in a concrete box usually marked "SFWD." Carefully remove the lid by using a tool, such as a large screwdriver, to pry it off.
        • figure-2Read Your Water Meter - All San Francisco Public Utilities Commission (SFPUC) customers have their water use measured by a meter. The water and wastewater charges are based on the amount of water that passes through the meter on a monthly or bimonthly basis.
        • SFPUC uses two types of water meters: the straight-reading meter, which resembles the mileage odometer in an automobile (figures 1 and 2), and the round-reading meter which has separate clock-like dials . Both record water use in cubic feet. The SFPUC bills in units of 100 Cubic Feet; 1 UNIT EQUALS 748 GALLONS. Some straight reading meters also have a leak detection dial, shown as the red triangle in Figure 1. If all fixtures are off and the dial rotates continuously in one direction even slightly, this could mean there is a leak somewhere on the property.
      9. leaksDetect Leaks Once you figure out how to read the water meter, you can use it to detect leaks, notice sudden spikes in usage, and monitor daily usage. Start by turning all water-using appliances off, so that no water is being used anywhere in the building. Then check the position of the meter dial and wait. If after 15 minutes, the dials haven't moved, your meter is "holding" and all fixtures are tight. However, if you notice that the dials have moved, check the toilets for leaks.  Put a few drops of food coloring or dye tablets (provided by your water utility) into the toilet tank and wait a few minutes.  If there is blue in your toilet tank, you have a leak, probably at your flapper valve.  More information on flapper replacement is available at:  Also check the water level in your toilet's tank. In a standard toilet, the water level should be one inch below the overflow tube.  If the water is overflowing into the tube, try to set reset the water level according to manufacturer's specifications. If the valve fails to shut off, your fill valve should be replaced. If there is no leak in the toilets, check all angle stops under your sinks and hose bib connections.  If the connections are tight, there may be a hidden leak or a blind leak in an underground pipe or within the walls of the property. 
        • Detecting "Blind" Leaks - If you think you might have a blind leak, you can try to isolate the leak by use of your main house valve or supply valve. You can also contact SFPUC ( at (415) 551-4730 to assist with leak detection and give recommendations for reducing your water use.
      10. pressure-2Water Pressure When water pressure is too high it wastes water and causes stress to pipes and fixtures. Water should enter the property at 45 to 60 pounds of pressure per square inch (psi). You can check your water pressure with a pressure gauge that attaches to your outdoor/indoor faucet threaded for a ¾ inch hose bib, available at most hardware stores for around $10. Water pressure over 60psi can cause a strain on your plumbing fixtures or pipes and can even cause bursts in the water line. Pressure in excess of 80 psi may void warranties in some appliances and fixtures. If your water pressure exceeds 70 psi, install a pressure-regulating valve (see images below). Depending on the size and type of regulator, they cost anywhere from $40 and up, and can prevent future maintenance costs and leaks.
      11. Water-Efficient Landscaping This refers to the conservation of water through creative landscaping. Originally developed for drought-afflicted areas, the principles of water-efficient landscaping have an ever-broadening appeal. With water now considered an expensive and limited resource, all landscaping projects, residential or commercial, can benefit from this alternative and almost any landscaping style can be achieved. The principles can be applied to all or part of a yard, in any geographic region of North America. To meet our standards, a business should have landscaping with check valves, rain shut-off sensors, watering during pre-dawn hours, matched sprinklers with same precipitation rates, 2-3" of mulch on non-turf planting areas, and repair or replace defective or broken water fixtures. For more information, visit: