LICENSE SUBCATEGORY
BACKFLOW PREVENTION REBUILDER
7
BACKFLOW PREVENTION TESTER
JOURNEYMAN PLUMBER
MASTER PLUMBER
6
MEDICAL GAS CERTIFICATION
1
REG UNL PLUMBER
LOCALITIES
Superior
37
Cottage Grove
26
Forest Lake
Owatonna
21
Wyoming
Anoka
17
Andover
16
Champlin
13
Elk River
12
Minneapolis
11
Duluth
10
Rochester
Winona
Fargo
Grand Forks
9
OLSON, ASOLPH L
Minnesota (Prescott) - Plumbing - Backflow Prevention Tester Issued