The Northern San Joaquin Section (NSJS) was established in 1922 and originally affiliated with the California Water Pollution Control Association (CWPCA).
The purpose of this section is to enhance the education and technology to protect the quality of our water resources and to promote the ecological balance with the environment's other resouces such as land and air. The NSJS is now affiliated with the California Water Environment Association and has a membership of over 400 water and wastewater professionals. Officially, the NSJS includes Alpine, Amador, Calaveras, Merced, San Joaquin, Stanislaus, and Tuolumne counties.
05/29/2026
It’s that time again! Join us for the annual CWEA NSJS MEMBER APPRECIATION DAY River Float and Free Meal!
When: Friday June 26th at 9:30
Where: 18000 Covered Bridge Road, Knights Ferry, CA 95361
Contact: Justin Peterson at 209-482-6586 [email protected]
We can’t wait to see you all there!!
05/29/2026
Find more details about the rafting trip here!
05/29/2026
Find more details on the rafting trip in the photos here!
05/01/2026
More Fun out on the course at The 39th Annual Toilet Seat Open!
05/01/2026
CWEA Northern San Joaquin Section hosted the “Open” against CWEA Sacramento Area Section today, May 1st at The Reserve at Spanos Park!
The 39th annual Toilet Seat Open brought together over 120 attendees and 25 incredible sponsors for a day full of fun, connection, and friendly competition.
A huge THANK YOU to all of our sponsors for your generous support—you’re the reason events like this continue to thrive and bring our water community together. 👏
We appreciate everyone who came out and made this event such a success. Already looking forward to next year!
03/01/2026
CWEA NSJS March 2026 Dinner Meeting
Join us Wednesday, March 18, 2026 at Valley Brewing Company in Stockton for an evening of networking, shop talk, dinner, and an insightful technical presentation!
🕓 Networking: 4:00 PM
🍽️ Dinner & Meeting: 4:30 PM
📍 Valley Brewing Company , 157 W Adams St, Stockton, CA
Topic: Impacts of Condition Assessments & Master Planning – Developing Sonoma Water’s Roadmap to the Future
Earn 1 CWEA Contact Hour!
💲 Members: $35
💲 Non-Members: $40
💲 Students: $10
Register early! Deadline: March 16, 2026
Link in Bio
https://bit.ly/NSJSMarch2026DinnerMeeting
Tag your team and we’ll see you there!
12/17/2025
CWEA NSJS January Dinner Meeting – Jan 15, 2026
Join us for a data-driven discussion on odor, corrosion, and UVT control in Modesto’s wastewater system, featuring insights from the City of Modesto and Woodard & Curran.
📍 Skewers Kabob House | Modesto
🕞 Networking: 3:30 PM | 🍽 Dinner & Meeting: 4:00 PM
🎓 Earn 1 CWEA Contact Hour
$35 Members | $40 Non-Members | $10 Students
Register by Jan 11:
https://bit.ly/CWEANSJSADataDrivenRoadmapToOdor
12/17/2025
Register by Jan 11:
https://bit.ly/CWEANSJSADataDrivenRoadmapToOdor
07/12/2025
💧**Thank you, City of Merced Lab!**💙
The CWEA Northern San Joaquin Section Laboratory Committee had an amazing time touring the Merced Wastewater Treatment Plant and Laboratory on July 3rd! 🙌 Big thanks to the Merced team for hosting and sharing their impressive ELAP & TNI-2 certified operations.
We’re always looking for more CWEA members to get involved, learn something new, and connect with peers in the field. Stay tuned for our next lab committee event — we’d love to see you there! 👩🔬👨🔬🧪