Massachusetts
Division of Professional Licensure
CATHAL D. O BRIEN
Drinking Water Supply Facility Operator
License number
20596
Date granted
04/14/2007
Date expires
12/31/2013
Class
Drinking Water Supply Facility Operator
Status
Licensed
licensingma.org
ID 3168946
LAST UPDATED 2026-04-02 23:29:55 UTC
LAST UPDATED 2026-04-02 23:29:55 UTC
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