Search our directory of members to find local septic system installers, designers, haulers and more.

All of the Ontario Onsite Wastewater Association’s Registered Professional Program (RPP) participants are distinguished by a special star that matches the colour of their classification listed in the legend on the right-hand column of the map.

OOWA members participating in the RPP are onsite professionals committed to pursuing a special designation requiring continuing education and ongoing skills training specific to the onsite wastewater industry.