Castro Valley Sanitary District offices are located at 21040 Marshall Street, Castro Valley, CA 94546.

The nearest cross-street is Castro Valley Blvd. We are located in Castro Valley next to Rite Aid, and are open Monday-Friday 7:00 am-11:00 a.m. and 12:00 p.m.-4:00 p.m.

Driving

From South Bay:
I-880 N toward OAKLAND.
Merge onto I-238 S toward I-580/CASTRO VALLEY/STOCKTON.
I-238 S becomes I-580 E.
Take the GROVE WAY exit toward CROW CANYON RD.
Turn Left onto GROVE WAY
Turn Left onto CASTRO VALLEY BLVD.
Turn RIGHT onto MARSHALL ST.
End at 21040 Marshall St., Castro Valley, CA 94546

From East Bay:
I-680 S toward SAN JOSE
Merge onto I-580 W toward OAKLAND
Take the exit toward CASTRO VALLEY
Turn LEFT onto E CASTRO VALLEY BLVD.
Turn RIGHT onto MARSHALL ST.
End at 21040 Marshall St., Castro Valley, CA 94546

From San Francisco:
I-80 E toward OAKLAND.
Merge onto I-580 E toward DOWNTOWN OAKLAND/HAYWARD-STOCKTON
Take the GROVE WAY exit toward CROW CANYON RD.
Turn LEFT onto GROVE WAY
Turn LEFT onto CASTRO VALLEY BLVD.
Turn RIGHT onto MARSHALL ST.
End at 21040 Marshall Street, Castro Valley, CA 94546.

From San Ramon/Crow Canyon Road:
CROW CANYON RD. towards CASTRO VALLEY.
Turn RIGHT onto CASTRO VALLEY BLVD.
Turn RIGHT onto MARSHALL ST.
End at 21040 Marshall Street, Castro Valley, CA 94546.

BART

From San Francisco
Board DUBLIN/PLEASANTON bound train
Exit at CASTO VALLEY station
Walking from CV Bart Station
Go NORTHEAST on NORBRIDGE AVE toward REDWOOD RD.
Turn RIGHT onto CASTRO VALLEY BLVD
Turn LEFT onto MARSHALL ST

From Concord
Board SAN FRANCISCO INT’L AIRPORT bound train
Transfer at MACARTHUR station
Board FREMONT bound train
Transfer at BAY FAIR station
Board DUBLIN/PLEASANTON bound train
Exit at CASTRO VALLEY station
Walking from CV Bart Station
Go NORTHEAST on NORBRIDGE AVE toward REDWOOD RD.
Turn RIGHT onto CASTRO VALLEY BLVD
Turn LEFT onto MARSHALL ST

From Richmond/Berkeley
Board FREMONT bound train
Transfer at BAY FAIR station
Board DUBLIN/PLEASANTON bound train
Exit at CASTRO VALLEY station
Walking from CV Bart Station
Go NORTHEAST on NORBRIDGE AVE toward REDWOOD RD.
Turn RIGHT onto CASTRO VALLEY BLVD
Turn LEFT onto MARSHALL ST