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.
09/28/2026
Happy Source Water Protection Week! 💧
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.
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.
09/24/2026
The Manteca Pumpkin Fair returns next weekend! SSJID is proud to serve as a Gold Sponsor of this year’s event, hosted by Manteca Sunrise Kiwanis in Downtown Manteca on October 3 and 4.
The District has been a longtime sponsor of the Pumpkin Fair and is proud to be part of a tradition that brings the Manteca community together each fall.
Be sure to stop by the Kiwanis tent and pick up one of our legendary SSJID pumpkin backpacks! 🎃
To learn more, visit https://loom.ly/Lrv23sc.
09/20/2026
Technology is helping water agencies make more informed decisions about the systems they rely on every day.
In another installment from the San Joaquin Tributaries Authority, SSJID Water Treatment Plant Manager Justin Ashworth shares how members are using real-time data and modern engineering to optimize system performance and strengthen water deliveries.
To learn more about Justin’s perspective, watch the full video here: https://loom.ly/Kzc_Ptg
09/17/2026
Working together gives water agencies access to more tools, knowledge, and expertise.
As part of the San Joaquin Tributaries Authority’s ongoing video series, SSJID Engineering Manager Forrest Killingsworth shares how member agencies collaborate to access advanced technology and strengthen their approach to maintaining critical infrastructure.
Watch the video to hear more from Forrest: https://loom.ly/E_-ZHbs
09/11/2026
SSJID enjoyed spending an evening with neighbors, families, and local vendors at Escalon’s final farmers market of the season. From conversations at the booth to activities for kids, staff had the chance to connect with those they serve and share more about the District’s work.
While Escalon’s market has wrapped up for the year, there are still plenty of opportunities to shop local and support growers. The Ripon Farmers Market continues on Thursdays through the end of September, and the Manteca Farmers Market is open on Saturdays through October 31.
For more than a century, agriculture has helped shape SSJID’s service area, and the District is proud to remain connected to the people that make it thrive.
09/07/2026
As a reminder, SSJID offices will be closed Monday, September 7, in observance of Labor Day and will reopen Tuesday, September 8.
09/06/2026
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.
09/04/2026
Last month, SSJID General Manager Peter Rietkerk joined industry professionals, farmers, and federal agency representatives at the California 5th District Water and Agricultural Forum, hosted by Congressman Tom McClintock.
Discussions focused on the future of California’s resources, the needs of the Central Valley, and continued coordination among those who serve the region. Rietkerk represented SSJID, alongside Tri-Dam Project General Manager Summer Nicotero.
SSJID Board Member Glenn Spyksma was also in attendance, along with representatives from Stockton East Water District, Oakdale Irrigation District, Modesto Irrigation District, and Turlock Irrigation District.
Events like this create an important space to exchange perspectives, strengthen partnerships, and advocate for the communities and growers we serve.
09/03/2026
September is National Preparedness Month, an annual reminder of the importance of being ready for emergencies and unexpected events. Preparation starts with the essentials, including reliable services you can count on when they’re needed most.
That commitment to reliability is central to SSJID’s Powered by Purpose initiative. For more than 115 years, the District has safely and reliably delivered water to the communities it serves. SSJID is working to bring that same level of dependable, locally accountable service to electric power, with decisions and operations centered right here in the region.
Learn more about SSJID’s vision for reliable, locally owned power at https://loom.ly/ipezFtk.
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Telephone
Website
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 |