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Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Avenue, Room 1000, Portland, OR 97204

More Contact Info

Treatment Species

The city is managing these species for eradication.

Orange Hawkweed

Hieracium auranticum

Policeman's Helmet

Impatiens glandulifera

Blessed Milk Thistle

Silybum marianis


Galega officinalis

Water Primrose

Ludwigia peploides ssp. montevidensis

Giant Hogweed

Heracleum mantegazzianum


Brachypodium sylvaticum