Recently in Weather-based Irrigation Category

California Drought Opens Gray Water Approval Statewide

California regulators have opened the floodgates for using "gray water" by issuing an emergency decision that allows residents to create simple water-reuse systems without a construction permit.

The California Building Standards Commission had expected an overhaul of gray-water rules to take effect in 2011. But on Thursday, it adopted the regulations on an emergency basis due to the deepening drought. Local health agencies may adopt stricter conditions than the state's after they hold public hearings.

Gray water includes wastewater from showers, bathtubs, bathroom sinks, laundry tubs and washing machines, but not from toilets, kitchen sinks or dishwashers.

Homeowners still must follow state guidelines for installation and use. The rules require minimal contact between people and the gray water, for instance by covering the water-release point with at least 2 inches of rock, mulch or other material.

'GRAY WATER' FACTS

New state rules provide permit exemptions for some residential gray-water systems, but people still have to follow several requirements. They include:

 The system must allow users to direct water to an irrigation field or the sewer.

 Ponding and gray-water runoff are prohibited.

 Gray water can be released above ground, but the discharge point must be covered by at least 2 inches of mulch, rock or other material that minimizes human contact.

 Water used to wash diapers or other soiled garments must be sent to the sewer.

 Gray water shouldn't be used on root vegetables.

Online: For more information about California's new standards for gray-water systems, go to uniontrib.com/more/gray.




Roughly 1.7 million gray-water systems are installed statewide. Most are illegal because homeowners almost always avoid permits and the associated fees. Do-it-yourselfers can build a gray-water system for $200 or less, but permitting-process costs can more than double the expense.

A standard home generates about 160 gallons of gray water per day, or nearly 60,000 gallons per year, state officials said. A family of four could reuse 22,000 gallons a year by tapping the rinse water from its washing machine.


To learn about the latest in water-efficient technology, click on one of the categories below:

Commercial Food Services
Dishwashers  |  Food Steamers |  Ice-Makers |  Pre-Rinse Spray Valves (PRSVs) 
Commercial food service represents one of the larger water using sectors in the non-residential category.Commercial Food Services 

Commercial and Residential Faucets

Faucets have not been a primary focus of water efficiency advocates, given that the Energy Policy Act (EPAct) of 1992 and subsequent EPAct legislation have limited faucet flows to 2.2-gpm (at 60 psi).  It is only now that serious attention (by the U.S. EPA's WaterSense product labeling program) is again being given to residential faucets and the possible new opportunities for further efficiencies.   Commercial and Residential Faucets

High-Efficiency Clothes Washers (HEWs)

High-efficiency clothes washers (HEWs) utilize technological advances to deliver excellent wash performance while saving both water and energy. Resource efficient models use 35 - 50% less water. This reduction in water use means less energy needed to heat the water (approximately 50% less energy). Over 100 models of residential and commercial high-efficiency washers are offered by companies such as Continental, Dexter, GE, Huebsch, Maytag, Speed Queen, Staber, Unimac, Wascomat, and Whirlpool. High-Efficiency Clothes Washers (HEWs)

Landscape Irrigation Technologies

Research and Savings Studies  |  Water Agency Pilot Programs  | 
Irrigation Controller Manufacturers

Save 41 gallons per household per day -- That's what one study indicates could be water conserved using weather-based automatic irrigation controllers. The savings are reported to be even greater on commercially sized landscapes (as much as 472 gallons per day or more!). And with this reduction in water use comes an additional benefit: a companion reduction in dry-weather runoff and reduction in waterborne contaminants. Landscape Irrigation Technologies

Medical and Health Care Systems
Health care delivery in the U.S. has certainly become a "high-tech" industry sector. Whether in the dental office, the clinic, the physician's office, or the hospital, equipment is sophisticated and evolving. And some of the older equipment uses exceedingly high amounts of water, usually for cooling. Technologies designed to replace the traditional "once-through" cooling are making their way into some of this equipment.

Moreover, the health care industry sees the benefit of the "GOING GREEN" and has developed the Green Guide for Health Care, which addresses wateruse within the industry's facilities.  Medical and Health Care Systems

Potential Best Management Practices
This study addresses four of candidates of best management practices:
1) Residential and small commercial weather-based irrigation controllers
2) Pre-rinse spray valves for the food service industry
3) Steam sterilizer retrofits
4) X-ray film processor recycling units
Download the report: -  PBMP Report- Year One (PDF) 

1) On-Premise Laundries
2) High-Efficiency Plumbing Fixtures - Toilets and Urinals
3) Submetering of Multi-Family Residential Properties
4) Commercial-Industrial Cooling Water Efficiency

Download the report: - PBMP Report- Full Year Two Report (PDF - 4.46 MB)

Potential Best Management Practices (PBMP) Reports

Residential Dishwashers
The American Housing Surveys for the U.S. (1985 to 2003) confirm an increasing trend in the installation of dishwashing appliances.  58% of all housing units possessed automatic dishwashers in 2003. At the same time, 88% of all new housing stock (4 years old or less) were being equipped with them. Residential Dishwashers

Residential Hot Water Distribution Distribution of hot water within residential dwellings has become one of the "hot topics" in water conservation circles!  Residential Hot Water Distribution

Toilet Fixtures

High Efficiency Toilets (HETs)  |  Drainline Studies  |  MaP and UNAR  |  Plumbing Standards  |  Ultra Low Flow Toilets (ULFTs)  |  Flappers & Flush Valve Seals    

Toilet fixture replacement represented one of the most popular water efficiency initiatives of the 1990s, as drought conditions motivated water providers to implement water conservation programs. In these programs, older 3.5- and 5.0-gallons per flush (gpf) toilet fixtures in residences were replaced with 1.6-gpf fixtures. Today, many water providers with aggressive replacement programs are approaching a level of "saturation" in their residential sector wherein the majority of residential toilet fixtures are 1.6-gpf models. Therefore, many water providers have moved on to other priorities in their conservation programs.   Toilet Fixtures

Urinal Fixtures

High Efficiency Urinals  |  Non-Water Urinals 

Different types of flushing urinals have existed in North America for many years with little technological change. In the early 1990s, however, the introduction of the first non-water urinal in the U.S. changed the perspective of water efficiency proponents. Since that time, hundreds of thousands of non-water urinals have been installed here, savings millions of gallons of water each year. Today, manufacturers are developing and refining urinal models that flush at 0.5-gpf (1.9-liters) and below, some with as little as 1-pint of water (0.5-liters).   Urinal Fixtures

Vehicle Washing There are certain questions that always seem to arise when "conservation" of water becomes a local issue. A number of studies have been completed over the years that describe what new technologies and practices are available to that sector.   Vehicle Wash Facilities

Wet Cleaning

The replacement of traditional dry cleaning practices in the the South Coast Air Basin with alternative technologies is underway. Read about the background for this dramatic change in the way clothing will be cleaned:  Wet Cleaning Background Information  & Wet Cleaning

The California Urban Water Conservation Council was created to increase efficient water use statewide through partnerships among urban water agencies, public interest organizations, and private entities.  The Council's goal is to integrate urban water conservation Best Management Practices into the planning and management of California's water resources.

Learn more details at the California Urban Water Conservation Council

Tips for Water Conservation in Landscapes

Water efficiently.
A truly efficient way to use water in a yard is to design a landscape that exists predominantly on rainfall. Even with lawn and specialty gardens, it is possible to design it as a low-water, low-maintenance yard. However, even an ideal landscape can be over-watered. It is extremely important to only irrigate to meet the needs of the plants in that area. For example, a lawn in full sun will demand more frequent irrigation than an established plant bed of drought-tolerant shrubs and groundcovers.

Reduce stormwater runoff.
Keeping rain and sprinkler water on your yard, and out of storm drains, reduces pollution of our shared streams, bays, rivers and lakes...and even the ocean downstream from you. Runoff can be reduced by directing downspouts onto lawns or landscaped beds, using rain barrels to collect rain water for irrigation and using pervious materials such as gravel or mulch for driveways and paths.

Protect the waterfront.
Natural water features, such as a stream or lake make a special contribution to our quality of life, but these natural treasures are also very fragile. Create a 10-foot-to-20-foot "buffer zone" to the shoreline where no chemicals are applied, and where you remove invasive exotic plants and replace with appropriate natives or other non-invasive exotics.  In fact, it's smart to remove exotic, invasive plants everywhere! 

Select plants that require less water.
Many of these will likely be native or low-water plants. An additional benefit to using native plants is that they tend to attract local wildlife. Many native plants survive only on rainfall -- and that reduces your water bill, and the impact on our fresh water supply.

Native and other "climate appropriate" landscape materials can reduce irrigation water use by more than 50%.

Water efficiently.
Large amounts of water are consumed by watering landscapes. Efficient watering or irrigation practices are essential to conserve water. Over watering not only reduces our fresh water supply but can result in excess water run-off carrying fertilizers and pollutants into our streams, bays, lakes and rivers.

Over watering can also result in disease such as fungus and in the excessive growth of weeds and pests. Signs of over watering include dollar weed, root and leaf disease, and thatch buildup. Too much water promotes weak growth and that increases pruning and mowing.

Less frequent watering encourages deeper root development and healthier turf. Using chemicals to combat the results of over watering contributes to stormwater runoff and lake and well pollution.

Use the most efficient irrigations methods.
Use trickle, drip or soaker hose irrigation systems where possible. They use less water than sprinklers and are particularly effective in areas that require more water such as trees or gardens.

When sprinklers are used, select one that releases water slowly and close to the ground in contrast to one that releases a mist which tends to evaporate more easily. Place sprinklers at the top of sloped areas so that the water that does run away ends up watering the entire slope.

Irrigation heads should be aligned with the areas that they are intended to water.

Use the best choices for watering.
  • Sprinklers for Lawns
  • Bubblers for Trees
  • Drip Irrigation for Gardens and Shrubs
  • Soaker Hoses for Flower Beds and Ground Covers
Don't forget to turn drip or soaker hoses off.
A timer will help eliminate this frequently occurring problem. Irrigation systems also can be metered and set to deliver a specified amount of water. New irrigation systems are facing increasing legal requirements to comply with water conservation measures.  One frequent requirement is a rain shut-off device or sensor that will override the system if sufficient amounts of rain have fallen.

Check irrigation systems for leaks.
If water drips or leaks from a faucet after being turned off, it could mean that the washer is worn out and needs replacing or the faucet may be broken. The washer can be replaced by the maintenance staff.

  • Use washers between faucets or spigots and water hoses to reduce the loss of water between connections.
  • Check your hoses for punctures.
  • Repair punctures with duct or electrician's tape or by splicing (connectors can be found at hardware or home supply stores).
  • When using a hand hose to water new plantings, use a nozzle to control the amount of water used.

Watering Times
The best time to water is during the early morning hours when temperatures and wind speeds are at their lowest. Water evaporates quickly in the heat of the day. When it is windy, water may not reach targeted areas or may fall unevenly onto paved areas. If you cannot water in the early morning hours, the next best time to water is in the early evening.

Check local regulation for watering times.
Become familiar with the watering restrictions in your city or water district. Standard restrictions frequently include no irrigation between 10 a.m. and 4 p.m. There may be additional restrictions, especially during drought conditions. Check with your local water management district and local utility for seasonal changes, and emergency regulations that can be put into effect rapidly.

Check soil before watering.
Before watering, check the soil below the surface.  There may be moisture below the surface. There are tools (such as soil probes or soil sampling tubes) that can be used to obtain soil samples to check for moisture.

Water the lawn only when needed.
Signs that grass needs watering are: edges of the blades will begin to roll, fold or look wilted; grass will not spring back when you step on it; or the color changes from bright green to dull gray-green or blue.

Water thoroughly, slowly and less often.
Lawns should be watered so that the soil is moist to a depth of four to six inches. It is better to water your lawn thoroughly (so water reaches the root systems) once each week than to water it lightly each day. Watering lightly could actually harm your lawn because only the surface, rather than the roots, may be reached. Watering should be done slowly to avoid runoff. When the soil has high clay content, it will absorb water slowly. Sandy soil absorbs water quickly but won't retain moisture. Adding organic material will help correct these problems. Spread several inches of mulch, such as wood chips, pine straw or leaves. Shaping the mulch and soil around trees or other large plants into basins will help catch and retain water.

To learn more about water conservation specifically in Florida, visit the University of Florida

WaterSense Partner Landscape Irrigation Services

All too often, landscape irrigation wastes water--up to 1.5 billion gallons every day across the country. WaterSense irrigation partners can help you reduce your water consumption, save money, and maintain a healthy and beautiful landscape. These professionals are certified through WaterSense labeled programs for their expertise in water-efficient irrigation technology and techniques.

If homeowners with irrigation systems hired WaterSense irrigation partners to perform regular maintenance, each household could reduce water used for irrigation by 15%.

That's the amount of water that would flow from a garden hose if it was left running for almost a whole day.
WaterSense irrigation partners can help you design and install a new irrigation system or audit an existing one to minimize the amount of water you use, greening your yard in more ways than one. If there's anyone who can help you with the latest best practies, it's probably someone connected with the EPA's excellent research and educational outreach!  Here you can learn about Integrated Pest Management, plant species best for your location, native plants, soil health...and earthworms, you best underground friends!...and much more.  

Review the list of landscape irrigation professionals partnering with WaterSense!

Weather- or Sensor-Based Irrigation

Irrigatinon isn't an efficient use of water!  That said, we all love a patch of green grass, so how do we balance the need for beauty and comfort with the need to protect our fresh water supply?

There are several strategies that work together:  Choose plants for low water use.  Mulch and compost to seal in vital moisture for your plants.  Use permeable hardscape (lets rainwater run through into the ground) and cisterns to maximize use of your rainwater supplies.  And use smart irrigation if you must irrigate.

Weather and Sensor-based Irrigation 

Irrigation controllers are far more efficient than waterhoses and sprinklers that water the sky!  New technologies are making irrigation systems more efficient, too. The computer controlled irrigation system has gone far beyond timers.  There are now sensors that you can install near each of your most precious plants such as flowering shrubs and trees -- and there are sensors to measure the moisture in the soil...and the air! 
 
Weather- or sensor-based irrigation control technology uses local weather and landscape conditions to tailor irrigation schedules to actual conditions on the site or historical weather data. Instead of irrigating according to a preset schedule, advanced irrigation controllers allow irrigation to more closely match the water requirements of plants.

These new control technologies offer significant potential to improve irrigation practices in homes, businesses, parks, and schools across the United States.

EPA's WaterSense program provides a label for approved conservation products.  They are constantly adding more kinds of technology to their test schedules, and irrigation systems in on the list!  EPA plans to label weather-based irrigation controllers and soil moisture sensors i the near future.  In the meantime, you can check with your landscape society, your local water conservation organization, your utility company's conservation department, or a state water agency for best practices and irrigation system recommendations.

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