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AMI (Advanced Metering Infrastructure) is the latest in metering technology used by water agencies across the United States and internationally to provide more accurate, up-to-the-moment water use information.
In contrast to MMWD’s standard meters which are typically read every two months, AMI systems automatically provide more frequent reads. This enhances our ability to detect leaks and provide customer support, while also making it easier for customers to manage their water use and their water bill. AMI can also help protect water quality by detecting reverse flows on a water meter and alerting district staff of potential backflow contamination.
MMWD’s AMI Pilot Project—funded by a $975,000 grant from the California Department of Water Resources—is installing AMI endpoints in two phases. The first phase covers about 800 dedicated irrigation meters throughout our service area. These are primarily large landscape customers (parks, golf courses, HOAs, schools, businesses) who can benefit from being able to easily monitor irrigation water use at multiple locations.
The second phase of the project includes about 1,200 select households in the Tiburon-Belvedere area. This area was chosen for the pilot because it offers a good mix of concentrated customers and topography to allow us to evaluate the benefits of AMI for residential customers.
For the pilot project, we selected neighborhoods based on a variety of factors including topography, water pressure zones, distribution system age and potential for leaks, and landscape size. By including a cross section of different neighborhoods in the pilot project, we’ll be better able to evaluate the benefits of AMI for our customers.
No, there is no charge for the AMI technology.
In most cases, the AMI endpoint is installed onto an existing water meter. This generally takes less than 30 minutes and there is no disruption to service.
Yes, AMI is as safe as cell phones, laptops, bluetooth devices and similar equipment. The AMI technology MMWD is installing transmits water use data once per day via cellular signal from your water meter box. The signal strength is equivalent to sending a text message.
Yes, the data transmitted from your meter is encrypted and includes only meter flow information. No billing or personal information is transmitted.
To opt out of the AMI Pilot Project, simply call the Water Conservation Department at 415-945-1520 to notify us of your choice.
For additional questions, contact the Water Conservation Department at 415-945-1520.
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One of the biggest components of the bills is the creation of water-use objectives for water agencies (not individual households or businesses). Starting in 2023, water agencies such as MMWD will be required to calculate and submit a water-use objective to the state. By 2024, we’ll be required to meet that objective.
No. The water-use objectives are for local water suppliers’ system-wide, aggregate water use. There is no requirement for individual households to meet a specific water-use standard.
Each year, water agencies like MMWD will be responsible for ensuring that their system-wide aggregate water use meets the objective. The law gives local water agencies flexibility in how to best help customers within their own communities use water more efficiently, such as through conservation rebates and educational programs.
The standards will be calculated using water efficiency standards for indoor and outdoor water use that are developed through research and public input. The indoor calculation will initially be based on a provisional standard of 55 gallons of water a day per person. The outdoor calculation is still being determined, but will account for local climate and the number of irrigable acres, including residential and commercial outdoor landscaping.
Yes. Households with water-efficient fixtures and appliances are likely already meeting this standard. Remember, too, that the 55 gallons per person per day will be used to calculate an aggregate target for our community. There is no specific water use standard for individual households.
Yes. By 2022, the state will adopt water-use efficiency performance measures for various commercial, industrial and institutional (schools, parks, etc.) water users.
MMWD will continue to share updates as the state develops guidelines for implementing the new legislation. In the meantime, we ask our customers to simply continue using water wisely, as you have done. Thank you!
Your water meter is an important conservation tool. It not only measures the amount of water you use, but it can tell you if there is a leak in your plumbing. Follow these simple steps to carefully monitor your water use:
You can also set up automatic payments on our online payment system from a checking account, MasterCard, Visa, American Express, or Discover. Click the Login / Register link at top right.
All of our residential water meters (meters one inch in size and smaller) are positive displacement meters. We buy this type of meter because when they fail, they fail in favor of the consumer. The manufacturer certifies the accuracy of the meters when they are new. With age and extended usage they either maintain their accuracy or they slow down.
For general questions regarding the Entitlement Program or to get entitlement or water budget information for your property, please contact the Water Conservation Department at 415-945-1520.
The Fire Flow Improvement Program was initiated in 1997 to improve the firefighting capability and seismic reliability of our water system. The program is funded by an annual $75 parcel fee paid by property owners in MMWD's service area. With the support of local fire officials, in 2012 the MMWD Board of Directors approved extending the original 15-year program for another 19 years (until 2031). The current program will replace 52 miles of pipelines with larger pipelines that can carry greater volumes of water and construct seismic improvements.
No, the annual fee is fixed and will remain the same for the duration of the current program, beginning in FY 2012-13 and ending in FY 2030-31.
The California Department of Public Health requires all drinking water additives, including fluoride, to meet the requirements of NSF 60, the nationally recognized health effects standard for chemicals used to treat drinking water. 47 states require that chemicals used in the treatment of potable water meet the NSF 60 standard.
Hydrofluorosilicic acid, the additive we use, meets the requirements of NSF 60 and therefore is an approved fluoride compound.
State legislation on water fluoridation also has a bearing on this issue. State Assembly Bill 733, which became law in 1995, requires water systems in California that have 10,000 or more service connections to fluoridate the water. The law does exempt water systems from this requirement if they do not have funds from outside sources to pay for the costs of fluoridation. Under the statute, “outside sources” are defined as sources other than the system’s ratepayers, shareholders, local taxpayers, bondholders, or any fees or charges levied by the water systems.
Annually MMWD receives about 1 million dollars in rental income from antenna site and property leases. This income qualifies as an “outside source.”
A careful review shows that even if there were a ballot measure within MMWD’s service area to overturn the 1978 fluoridation ballot measure, there is a strong argument and likelihood that the district would still be required to fluoridate the water supply because:• MMWD has more than 10,000 service connections• MMWD has outside income to pay the annual costs of fluoridation
When Lagunitas, Bon Tempe and Alpine are full, the overflow spills into other district reservoirs downstream. Water from Phoenix, Kent, Nicasio and Soulajule flows into local creeks where it provides many environmental benefits including habitat for endangered coho salmon and other fish and wildlife. Thus even water that goes over the spillways is put to good use.
When the district last filed for rights to expand storage in 1980, the result was 15 years of studies and hearings prior to reaching a court-ordered agreement. Since that time, stronger protections have been put in place for endangered coho salmon. Given the water needs for fish and the high volume of water we already divert, it is highly unlikely that MMWD would be granted the necessary approvals to further increase reservoir storage.
The simplest and least expensive way we can maximize our water supply is through conservation. That's why we ask our customers to use water wisely and why we offer a variety of conservation programs and rebates to help.
Dual-Flush: Dual-flush toilets save water by offering two different flush volumes, one for solids and one for liquids, so you save water by only using what you need. Most dual-flush toilets use 1.6 gpf for a full flush and 0.8 gpf for a reduced flush. Studies show these toilets average about 1.3 gpf.
Pressure-Assist: Pressure-assist toilets compress a pocket of air inside a sealed chamber as water fills. When flushed, the pressurized air forces the water rapidly into the bowl, creating a powerful, fast flush that has a “whoosh” sound. The flush can be slightly louder than standard toilets.
Single-Flush: A few manufacturers do offer HETs that utilize a single-flush—what many would describe as a “standard-style” toilet. These toilets use no more than 1.28 gpf.
Since 1995, when MMWD changed the distribution system disinfectant from chlorine to chloramine, a combination of chlorine and ammonia, MMWD has achieved a 57% reduction in THMs on average. The federal standard for THMs is 80 micrograms per liter (ug/L,) or parts per billion, while the THM count in MMWD's water averages 31 ug/L.
While HAA monitoring was not required before the conversion to chloramine, it has been well documented that the use of chloramine for a residual disinfectant significantly reduces the formation of HAAs. The average concentration found in MMWD’s distribution system is approximately one-third of the federal standard of 60 ug/L.
On its way to your tap the water temperature can increase and pressure is reduced as water enters distribution system tanks and ultimately flows with the released air bubbles out of your tap. There is no health impact associated with the air bubbles, but if you find the cloudiness unappealing, let the water sit for a few minutes or keep a container of water stored in the refrigerator.
The algal type is called Aphanizomenon or Aphan for short. Its presence does not degrade the safety of our water supply in any way and, unlike some types of algae, it does not produce any musty or moldy tastes or smells. While many algae types grow predominantly in the summer months, this type of algal sheen can be seen in nearly all months of the year.