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Visit our new ECOS Calendar

ECOS convenes two general membership meetings per year, an annual membership meeting and a spring membership meeting. In addition, ECOS hosts multiple project-based meetings. For more information about ECOS annual and spring events, contact Lia Parisien at 202-266-4931. For specific, project focused events, please contact the individual projects managers identified.

Upcoming Events

Date Title Sponsor
Apr 11, 2016 - Apr 13, 2016 2016 ECOS Spring Meeting

Oct 21, 2015 2015 State Environmental Protection (STEP) Meeting-Achieving Air Quality: The Clean Power Plan & More

Aug 31, 2015 - Sep 2, 2015 2015 ECOS Fall Meeting


FULL REGISTRATION-Early rate (paid by 7/17): $675 member/state/nonprofit; $775 federal/dues-paying Alumni Association; $875 other. Add $75 for registration 7/18-8/21. Add $50 more after 8/21. ONE-DAY REGISTRATION-Early rate (paid by 7/17): $350 member/state; $400 federal/alumni association; $450 other. Add $50 for registration 7/18-8/21. Add $50 more after 8/21. IMPORTANT NOTES-Cancellation by 7/17 subject to $35 fee. Non-emergency cancellation after 7/17 non-refundable. ***ECOS cannot comp attendees who plan to attend one session only, unless they are speakers for that session.


Attendees should make their own room reservations at The Hotel Viking at the link below or (800) 556-7126. The special ECOS group rate is available until July 30 or sellout of the room block, whichever is sooner. ECOS' room rate is the prevailing federal per diem rate (currently $165) plus applicable city and state (currently 13%) in effect at the time of checkout. ECOS room nights include August 30 and 31 and September 1, with limited availability on the bookend nights of August 29, September 2, and September 3. Check-in time is 4 p.m., and check-out time is 11 a.m. ***The hotel has a 72-hour-prior cancellation policy. Inquire with hotel for details