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Olson Environmental is now Riparia Environmental – delivering the same trusted service with a fresh new look.

A close-up of an invasive plant and an employee in safety gear appropriately applying a herbicide

INVASIVE & NOXIOUS
WEEDS

Badge showing cattails in water against sunset and green hills, text reading 'Invasive & Noxious Weeds'

CONTROL & REMOVE THE UNWANTED SAFELY & EFFECTIVELY

We provide comprehensive invasive species and noxious weed control services, holding a Commercial Applicator Pesticide License to ensure proper, legal application of pesticides for safe, effective weed management. 

Washington license number: WA 97510

Oregon license number:  AG-L1090698CPO

CORE SERVICES

WHAT SETS US APART

  • We have powerful support

    As a subsidiary of an award-winning consulting engineering firm, we offer an integrated approach with a proven track record for success throughout our region.

  • We know what’s at stake

    Our client-centered approach means we collaborate closely with you, tailoring services to your specific project needs and goals.

  • We know the landscape

    With 30-years of experience, we have the certifications, qualifications, and knowledge for all regulatory compliance.

WHAT WE DO

We offer a full range of natural resource-based environmental services for residential, commercial, public works, and retail development. Choose a service badge below to learn more.