Water – Safety & Sources in Milpitas

Origins of Milpitas water and where it goes later: creek maps, waste water, urban runoff, water quality.

Save Water Milpitas
Water is a precious resource and is an important necessity for our health, the sustainability of the environment, and for the livelihood of our businesses. Check here for rebates for high efficiency toilets and washing machines, and for free shower heads and aerators for faucets.

Water Waste Restrictions
The following uses of potable water are prohibited under the City of Milpitas Municipal Code: Chapter 6

When may I water my yard?

2022 Watering Schedule

  • You can water your yard THREE days per week, between the hours of 6:00 p.m through 9:00 a.m.
  • If your street address is an odd number, you can water your yard on Monday, Thursday, and Saturday.
  • If your street address is an even number, you can water your yard on Tuesday, Friday, and Sunday.
  • No watering on Wednesdays.
  • Remember, always make sure your watering doesn’t waste water and only waters your landscaping.

To Learn More about Water Conservation or To Report Violations
Call 408-586-2666

The City purchases and distributes water from Valley Water treatment plants, as well as from San Francisco Public Utilities Commission (SFPUC). Before making its way to your tap, your drinking water is treated and tested to ensure its safety. Valley Water and SFPUC are ensuring the water supplied to the City is of the highest possible quality meeting or exceeding all federal and state drinking water standards.

Don't Take Water For Granted

Don’t Take Water For Granted
Amina Ahmad, a sixth-grader at Marshall Pomeroy Elementary School, was a winner in the Bay Area Water Users Association Water Awareness Poster Contest. Her poster is featured in the association’s 2001 calendar.

Hot Lines
City of Milpitas Water Conservation
and Urban Runoff Hotline:
408-586-2666
City of San Jose Distribution Hotline:
800-426-4791
Santa Clara Valley Water District:
408-265-2600, Pollution Hotline: 1-888-510-5151
Water & Sewer Utility Rates
Water rates effective July 1, 2020.
Sewer rates effective July 1, 2020.

Our Watershed

The Coyote Creek Water Shed

Watersheds are nature’s way of dividing up the landscape. A watershed is the land area that catches rain or other runoff and drains to specific wetlands, streams, rivers, and reservoirs. Runoff from every home or business ultimately makes its way to a creek or channel. That’s why everyone somehow contributes to flooding even if it happens miles away. Creeks and street water in Milpitas flow into the Coyote Creek and then into the San Francisco Bay.

Adopt A Creek
This program offers citizen participation in creek cleaning projects within Santa Clara County. Helping with this program is a great way for schools, community organizations and private companies to demonstrate their concern about the environment. Santa Clara Valley Water District.


Calaveras Dam Time Lapse (2012-2018)
Time Lapse of the Calaveras Dam from April 2012 – September 2018 captured by EarthCam.


Moving Mountains at Calaveras Dam Replacement

Coyote Watershed Fast Facts
The county’s largest watershed, it extends from the urbanized valley floor upward to the vast natural areas of the Mt. Hamilton range. Coyote Creek, its main waterway, is the longest creek in the county. Resources for teachers and students.


Fixing Anderson Dam is a priority for Valley Water
In 2019, Valley Water produced a draft of a video depicting a worst-case scenario should a filled-to-capacity Anderson Dam fail in the event of a major earthquake. Valley Water embarks on Anderson Dam project after years of unexpected delays. The original plan –– to add buttressing and materials up and downstream to reinforce the dam –– would take roughly three years and come with a $250 million price tag. But in 2016, that number grew after the district conducted geotechnical borings of the surrounding soil and found evidence of seismic activity in two nearby fault lines previously thought to be inactive.

Flood Watch Tool
Introduction on how to use the flood watch tool for those living in flood zones near our creeks. Most important to those living near Penitencia Ck at Machado Ave. or working near Coyote Creek and 237.

My Hazards of Santa Clara County
Map showing areas of Milpitas and other Silicon Valley areas which have in the past been flooded. Many flood control systems have been installed, but if you are considering buying a home in these areas, do a thorough check first. Also shows earthquake zones.

Hetch Hetchy Photos
From before the dam was built. This group would like to restore the valley.

The California Education and the Environment Initiative (EEI) Curriculum
Teachers may access all of the EEI Curriculum online for free, and until the end of this school year students may access form-fillable workbooks and other materials directly from our website. Feel free to reach out to us at eei@calrecycle.ca.gov if you need support with your digital instruction and we’ll do our best to assist you.

Penitencia Water Treatment Plant
This plant typically serves an area from Milpitas in the north to Aborn Road in the south, supplying safe drinking water to 270,000 residential and commercial users.

South Bay Salt Pond Restoration Project
This project will result in large-scale restoration of wetlands from the San Mateo Bridge to southern edge of San Francisco Bay.

Water Quality

Water Quality Report: Consumer Confidence Report
The City of Milpitas is pleased to provide our customers with pertinent information about the quality of our drinking water. This annual water quality report tells you where our water comes from, what our tests show about it, and what is in it.

City of Milpitas Water Quality Report 2021
As mandated by law, each year, on or before July 1, the City of Milpitas is required to provide all of its water customers a copy of the CCR. The CCR provides water quality information and compares the quality of your water to established Federal and State drinking water standards. We encourage you to view this report as it provides information about the source and quality of the drinking water delivered to you.

In an effort to be better stewards of the environment, the City is no longer distributing paper copies of the CCR. The reports will instead be made available online. If you wish to obtain a paper copy of the 2021 CCR, you may pick one up from the Milpitas City Hall building located at 455 E. Calaveras Blvd., Milpitas, CA 95035. For any questions you may have, please contact us through our email at: MilpitasCCR@milpitas.gov.

Water & Sewer Bills

Automatic Payment Service
You can pay your water and waste services bill online; however, it takes 6-8 weeks to process your request. You can set this up in a day or so with your bank’s online service, but the City’s service is free.

Mail in Your Water Bill
Effective July 1, 2021, please us the new P.O. Bos address below to mail in your City of Milpitas/Sewer utility payments:
City of Milpitas
P.O. Box 102710
Pasadena, CA 91189-2710

–yes, you read that right, Pasadena.

Water conservation in the home
Are you concerned about high water bills and would like to use less water? Want a rebate for installing low water usage toilet or washing machine?

Water Systems

The San Francisco PUC, which draws its water from the Hetch-Hetchy system in the Sierra, serves 2.4 million people in San Francisco and 33 communities stretching from Milpitas and San Jose to Daly City and the water district in southern Alameda County.

City of Milpitas Water Maintenance Services
Maintenance Services provides for the routine and emergency operation, maintenance, and repair of the City’s water, sewer, and storm systems and facilities.

City of Milpitas Water Supply Map

Map helps you determine whether you get Hetch Hetchy water (the best tasting), or SVPUC water (still great water!).

Water and Sewer Master Plans
The City of Milpitas is approaching buildout, and open spaces are being converted to domestic and irrigation type uses, changing diurnal flow patterns and water needs. In addition, redevelopment of older industrial/commercial areas to high density residential is being considered as part of the Midtown Specific Plan.

Santa Clara Valley Water District
Parts of Milpitas are supplied with water from SCVWD. Watershed and flood control district primarily. Those in the quadrant west of 880 and south of 237 get water through SCVWD.

S.F. Public Utilities Commission
Provides Milpitas with Hetch Hetchy water. (Note to newcomers: Hetch Hetchy water is considered the finest!)

Hetch Hetchy Reservoir and Water System
Milpitas gets most of its drinking water through the San Francisco PUC. The Hetch Hetchy Project supplies water and power to the City of San Francisco and surrounding Bay Area communities, and regulates stream flow in the Upper Tuolumne River, Cherry Creek, and Eleanor Creek.

Where Your Water Comes From
Groundwater and local surface water is the county’s original source of water supply. Local rainfall and runoff flows into reservoirs for storage and blending with imported water. The water is released into creeks and ponds to augment natural percolation and maintain groundwater levels. Some of the local surface water is processed at drinking water treatment plants. The treated water is sold to local water retailers such as San Jose Water Company, who use their own distribution systems to serve customers. Water pumped from the groundwater aquifer through wells is used by private well owners, farmers, and water retailers.

Milpitas Waste Water Treatment

San Jose / Santa Clara Water Pollution Control Plant
The San Jose/Santa Clara Water Pollution Control Plant is one of the largest advanced wastewater treatment facilities in California. It treats and cleans the wastewater of over 1,500,000 people that live and work in the 300-square mile area encompassing San Jose, Santa Clara, Milpitas, Campbell, Cupertino, Los Gatos, Saratoga, and Monte Sereno.


San Jose/Santa Clara Water Pollution Control Plant Video Tour
This is an interesting and educational facility to visit. It is pertinent for general science students, biology students, and chemistry students.

Urban Runoff & Pollution Prevention

City of Milpitas Consumer Confidence Report issued June 2015
Last year, as in years past, your tap water met all USEPA and State drinking water health stan- dards. The City of Milpitas vigilantly safeguards its water supplies and once again, we are proud to report that our system had no health related water quality standard violations in 2014.

Managing Urban Runoff
To protect surface water and ground water quality, urban development and household activities must be guided by plans that limit runoff and reduce pollutant loadings. EPA.

Santa Clara Valley Urban Runoff Pollution Prevention Program
The Program’s mission is to assist in the protection of beneficial uses of receiving waters by preventing pollutants generated from activities in urban service areas from entering runoff to the maximum extent practicable.

Zoom webinars about gardening presented by the Bay Area Water Supply and Conservation Agency.
BAWSCA is commited to the communities we serve. We actively collaborate with our member agencies, other water agencies, and community partners and participate in a variety of public outreach and community events.

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