Chiang Mai Provincial Irrigation Office

Regional Irrigation Office 1

Lamphun Provincial Irrigation Office

Regional Irrigation Office 1

Mae Hong Son Provincial Irrigation Office

Regional Irrigation Office 1

Chiang Rai Provincial Irrigation Office

Regional Irrigation Office 2

Phayao Provincial Irrigation Office

Regional Irrigation Office 2

Nan Provincial Irrigation Office

Regional Irrigation Office 2

Lampang Provincial Irrigation Office

Regional Irrigation Office 2

Uttaradit Provincial Irrigation Office

Regional Irrigation Office 3

Phitsanulok Provincial Irrigation Office

Regional Irrigation Office 3

Phichit Provincial Irrigation Office

Regional Irrigation Office 3

Nakhon Sawan Provincial Irrigation Office

Regional Irrigation Office 3

Phrae Provincial Irrigation Office

Regional Irrigation Office 4

Sukhothai Provincial Irrigation Office

Regional Irrigation Office 4

Tak Provincial Irrigation Office

Regional Irrigation Office 4

Kamphaeng Phet Provincial Irrigation Office

Regional Irrigation Office 4