castro valley sanitary district Effective Environmental Services Since 1939

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Latest Announcements

January 26, 2022

CVSan wins Award of Excellence

The California Association of Sanitation Agencies (CASA) recently recognized Castro Valley Sanitary District (CVSan) and Oro Loma Sanitary District with an Award of Excellence as the recipient of the 2021 Outstanding Capital Project – Large Agency award for the recently completed Nutrient Optimization Project.

January 26, 2022

Earn a Coupon for a New Motor Oil Filter

Do you change your own oil and live in a single-family home? From February 7th to March 18th, you can participate in CVSan’s Used Motor Oil Filter Exchange Program to receive a coupon for a new oil filter.

January 11, 2022

Operations and Engineering Building Neighborhood Meeting

CVSan invites you to attend an upcoming virtual Operations and Engineering Building Neighborhood Meeting about the new Operations and Engineering building. The meeting will be held on Tuesday, February 8, 2022, from 6:00 to 6:30 pm.

January 11, 2022

CVSan Achieves California Green Business Recertification

CVSan has been recertified by the Alameda County Green Business Program as a California Green Business. 
January 10, 2022

43 Castro Valley Schools Attended CVSan’s 4Rs Field Trips in 2021

 CVSan recently completed presenting virtual 4Rs Field Trips to 31 third grade classes and 12 fourth grade classes, which included approximately 1,000 students.



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If this is a sewer emergency, please call us!
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21040 Marshall Street
Castro Valley, CA 94546

Monday - Friday
7:00 a.m. - 11:00 a.m.
12:00 p.m. - 4:00 p.m.

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Office Hours: (510) 537-0757
After Hours: (510) 506-5821