SonTek founding engineers

Founders of SonTek

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Last updated Sep 12, 2026

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Xylem's SonTek unit files notice to close San Diego site

Money Moves

As of September 2026: SonTek now a Xylem subsidiary

SonTek, the San Diego maker of acoustic Doppler instruments that measure river flow and ocean currents, filed a California WARN notice Thursday to close its local site. The shutdown is dated November 6 and affects all 36 employees on staff.

Updated Sep 12