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Contact Us

Please contact us for stormwater drainage, infrastructure, flooding, or water quality needs. 

BILLING NOTICE:   If your request is Annual Stormwater Fee related, please use our fee-dedicated web page and form for self-service and expedited response.

SEASONAL NOTICE:  Spring is our wet season, please report any stormwater drainage issues using the contact form below.   For mosquito control, please contact the City of Centennial Public Works Department or Arapahoe County Open Spaces, depending on where you live.

City of Centennial:

Information:  Mosquito Control webpage

Contact Link:  City of Centennial Report a Problem page

303-325-8000

OR

Arapahoe County Open Spaces Department:

Information:  Mosquito Control webpage

Contact Link:  askopenspaces@arapahoegov.com

720-874-6540

CONTACT SEMSWA FORM:

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SEMSWA OFFICE LOCATION:

(303) 858-8844

Business Hours: 8:00 am – 4:30 pm Monday thru Friday

Email: semswamain@semswa.org