Castro Valley Sanitary District

10/15/2026

CVSan’s Filter Exchange Program is happening now! Participate until November 20th to earn $15 coupons for new oil filters. Full instructions can be found at cvsan.org/UsedOil.

10/15/2026

Can you imagine a day without water?

Imagine that when you flush the toilet, nothing happens. Water is the foundation of public health, economic development, and community well-being, and we all play an integral role in protecting water’s future.

On October 15, challenges us to rethink the role of water and wastewater in our personal lives and professional ecosystems. CVSan is proud to shine a light on why water is invaluable and why it urgently needs investment.

Learn more: https://thevalueofwater.org/imagineaday

10/14/2026

The Special District Leadership Foundation has officially recognized CVSan with a District of Distinction accreditation at the Platinum Level. This accreditation is given for CVSan’s sound fiscal management policies and practices in special district operations. California has over 3,300 special districts. CVSan is currently one of 44 special districts to receive the District of Distinction, and one of 14 to receive it at the Platinum Level.

10/13/2026

Shall We Play A Game?

🧟‍♂️ Who says water treatment can't be spooky? CarboNet is bringing Halloween fun to the industry with a new video game focused on defending a treatment plant from zombies! 🎮💧



Read the complete story below ⬇️

10/13/2026

Do you have an easement on your property?

Easements found on private property give CVSan the right to access a portion of a person’s private property to perform emergency repairs and maintain the wastewater collection system and can include access points to manholes and risers. Learn all about easements at cvsan.org/Easements.

10/12/2026

Heads Up!

CVSan is an official Toy Drop Site for this year's Toys for Tots! We encourage you to donate a new, unwrapped toy for a local child in need. Our donation box is located on the second-floor reception area of our new building, at 21195 Center Street. We will accept donations until Tuesday, December 1st. Every donation supports a local child in need and helps brighten the holiday season.

10/12/2026

Congratulations to Holy Cross Episcopal Church, who was recently recertified as a 4R Star Business! Holy Cross Episcopal Church practices the 4Rs by participating in recycling and organics; not allowing or using any single-use plastics or foam; collecting clothing for reuse or recycling; and receiving and using donated furniture. Find out how your business can become a 4R Star for free at cvsan.org/4RStar.

10/09/2026

Happy Water Professionals Appreciation Week! Say hello to Kevin! We’re celebrating the people who help keep Castro Valley’s wastewater moving. Like or give a thumbs up in the comments to thank our local .

Whether it’s working with customers out in the field, collecting and analyzing samples in the lab, or shaping complex policies and regulations, there is a place in California’s water industry for anyone interested in managing and protecting this life-sustaining resource. A career in California water provides a great opportunity to earn a good living and make a difference in your community. Check out available careers by visiting:
www.acwa.com/careers.

10/08/2026

¿Cambia su propio aceite?
¿Vive en una casa unifamiliar?

Participe en el programa de “Filter Exchange” de CVSan para obtener un cupón para un filtro de aceite de motor gratuito: cvsan.org/UsedOil.

Single-Family residents: Place up to three (3) filters and three (3) gallons of used motor oil and other accepted auto fluids curbside per week.

10/07/2026

Happy Water Professionals Appreciation Week! Say hello to Lorenzo! We’re celebrating the people who help keep Castro Valley’s wastewater moving. Like or give a thumbs up in the comments to thank our local .