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SSJID At SSJID - the South San Joaquin Irrigation District.- we provide water for irrigation & drinking and generate clean electric power.

In 1909, the South San Joaquin Irrigation District was established to provide a reliable and economical source of irrigation water for the areas around Escalon, Manteca and Ripon. SSJID's historic water rights allow for several hydroelectric power plants on a series of dams and reservoirs on the Stanislaus River. SSJID and Oakdale Irrigation District completed the original Melones Reservoir in 1926, and have co-owned the Tri-Dam Project, consisting of Donnells, Beardsley and Tulloch reservoirs and powerhouses since 1957. In 2005, as unprecedented urban growth replaced agricultural land, the District expanded into providing domestic water service to South San Joaquin County cities with its state-of-the-art water treatment plant. In 2009, SSJID completed a 1.4 megawatt solar farm that provides nearly all of the electricity to run its water treatment plant, and the District passes on a 15% savings on power costs to the cities who participate in the treatment plant. For several years, the District has been moving towards providing retail electric service as well, aiming to cut electric bills of those in its service territory by 15% across the board.

A century of shared history! In 1926, SSJID and Oakdale Irrigation District completed Melones Reservoir, creating critic...
10/20/2026

A century of shared history!

In 1926, SSJID and Oakdale Irrigation District completed Melones Reservoir, creating critical water storage to support the region’s growing agricultural industry.

The project was an important step in shaping the water system that generations of local farmers would come to depend on. While the original reservoir has since been replaced by New Melones Reservoir, its completion marked a major milestone in the longstanding partnership between SSJID and OID.

This year, we celebrate 100 years since that achievement and the lasting role it played in our region’s water history.

10/15/2026

Today, SSJID joins water agencies and organizations across the country in recognizing Imagine a Day Without Water.

This national day of action encourages us to consider how much we rely on water. It’s something local students have captured in SSJID’s Vehicle Wrap Art Contest for many years.

Centered around the theme “Watering the Roots of Our Community,” the contest gives young artists a chance to show the role water plays in the places they call home.

Their artwork reflects an understanding of how important water is to our everyday lives and the future of our communities.

đź’§ To see all of the winning designs, visit https://loom.ly/mWuB5iQ.

Join us in downtown Ripon this Saturday, October 17, for Main Street Day!SSJID is proud to be a Golden Griddle Sponsor o...
10/14/2026

Join us in downtown Ripon this Saturday, October 17, for Main Street Day!

SSJID is proud to be a Golden Griddle Sponsor of the Ripon Lions Club pancake breakfast. 🥞 Be sure to stop by for a delicious start to the day before exploring everything the event has to offer.

Enjoy local vendors, food, entertainment, and activities for the whole family. And don’t forget to visit the SSJID booth and say hello to our team.

We hope to see you there!

âť—REMINDERâť—SSJID's 2026 irrigation season comes to an end on October 16.The normal 10-day rotation ends October 16 at 5 p...
10/13/2026

âť—REMINDERâť—

SSJID's 2026 irrigation season comes to an end on October 16.

The normal 10-day rotation ends October 16 at 5 p.m. to allow our teams to prepare for maintenance season. SSJID will be taking additional orders until October 19 as the system and schedule allows.

If you have any questions, please reach out to your Division Manager or contact us at (209) 249-4600.

Agriculture has shaped SSJID’s service area for more than a century, and generations of local farmers have played an imp...
10/12/2026

Agriculture has shaped SSJID’s service area for more than a century, and generations of local farmers have played an important role in the region we know today.

👩🏼‍🌾 On Farmers Day, we celebrate the growers who put in the work season after season, adapting to changing conditions while continuing to produce the crops that sustain our region and beyond.

SSJID is honored to serve our agricultural customers and support the water deliveries they depend on throughout the irrigation season.

The SSJID Board of Directors meets the second and fourth Tuesday of each month, unless otherwise noted.To find Board mee...
10/11/2026

The SSJID Board of Directors meets the second and fourth Tuesday of each month, unless otherwise noted.

To find Board meeting agendas and minutes, visit ssjid.gov.

For SSJID, clean energy is about more than how power is generated. It is also about managing energy wisely, optimizing o...
10/07/2026

For SSJID, clean energy is about more than how power is generated. It is also about managing energy wisely, optimizing operations, and strengthening resilience for the future.

That approach can be seen throughout SSJID’s history, from more than 60 years of hydropower generation through the Tri-Dam Project to solar production at the Robert O. Schulz Solar Farm. Today, Powered by Purpose carries that work forward with an effort to bring dependable, locally controlled power to the region.

During National Clean Energy Action Month, learn more about SSJID’s approach to energy at poweredbyssjid.com.

10/03/2026

Water Professionals Appreciation Week highlights the people whose knowledge, skill, and commitment help provide reliable water service across California.

At SSJID, our employees work across many areas to deliver irrigation water, operate treatment facilities, maintain critical infrastructure, manage complex systems, and prepare for future water needs.

This week, we thank the SSJID team and water professionals throughout the state for the work they do every day to keep this essential resource flowing.

Happy Source Water Protection Week! đź’§ The water we use every day begins with the health of our rivers, lakes, and ground...
09/28/2026

Happy Source Water Protection Week! đź’§

The water we use every day begins with the health of our rivers, lakes, and groundwater. Keeping these sources free from pollution is one of the most effective ways to preserve water quality for the people and places that depend on it.

At SSJID, careful management of existing supplies helps protect their value for the long term. With changing conditions and evolving demands, taking care of the resources available today is an important part of preparing for tomorrow.

Learn more about SSJID’s water services at https://loom.ly/CNBx3-Y.

Today is World Rivers Day! This annual observance celebrates the value of rivers around the world and encourages continu...
09/27/2026

Today is World Rivers Day! This annual observance celebrates the value of rivers around the world and encourages continued efforts to preserve these important water supplies.

Stewardship guides SSJID’s work along the Stanislaus River. Through careful planning and collaboration with regional partners, SSJID works to balance the needs of local communities and agriculture for generations to come.

Visit https://loom.ly/xotA0rg to learn more.

Address

11011 E Highway 120
Manteca, CA
95336

Opening Hours

Monday 7:30am - 4:30pm
Tuesday 7:30am - 4:30pm
Wednesday 7:30am - 4:30pm
Thursday 7:30am - 4:30pm
Friday 7:30am - 4:30pm

Telephone

+12092494600

Website

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