Ontario Association of Sewage Industry Services

OASIS was established in 1991 to support and represent businesses in the septic, portable toilet and biosolid land application industry.

Become a Member

Join the largest professional network of hauled sewage, septic and portable toilet companies in Ontario and be at the forefront of leading industry advancement, training programs and regulatory updates.

Training & Certification

OASIS training programs are designed in consultation with Ontario Ministries to ensure your business and employees are compliant.

Homeowner Resources

Learn more about how your septic system works and what you need to do to keep it operating efficiently to avoid costly emergency maintenance and replacement costs.

Our Events

13th Annual Chairty Golf Tournament

31st Annual Conference & Trade Show

13th Annual
Charity Golf Tournament


Wingham Lindon Hotel, 86512 London Rd, Wingham, ON N0G 2W0, 519-357-1342


Friday, June 9th, 2023
Tee Time: 11:00 A.M.


$125 Per Golfer
$500 Per Team

More Information

Lunch available by donation
Dinner & Auction 6:00 P.M.

31st Annual Conference & Trade Show


February 28th – March 1st, 2024

Venue & Hotel

Ajax Convention Centre & Hilton Garden Inn Toronto/Ajax