Denis Darche Excavation Inc.
Septic systemsWells and water pumps
Call · 514 863-3859Septic systems in Saint-Mathias-sur-Richelieu
RBQ data dated November 4, 2026: 2 companies active in Saint-Mathias-sur-Richelieu for septic system work. All of them have held their licence for 10 years or more, the oldest since 1984; none got its licence in the last 90 days. Closest: Belœil (12), Longueuil (33) and Sainte-Julie (10).
Get quotes for septic system work in Saint-Mathias-sur-RichelieuFree, no obligation: describe your work once, licensed companies answer you.
Get my free quotes →Marius Morier & Fils Ltee
Septic systemsWells and water pumps
Call · 450 658-5300Ad · Featured placement · examplePreview only — this is not a contractor listing
Your business could appear hereSeptic systems · Saint-Mathias-sur-Richelieu and the cities you serveHomeowners can open your profile and call you directly.
Other cities
Montréal 234Belœil 12Longueuil 33Sainte-Julie 10Brossard 16Boucherville 17Repentigny 11Terrebonne 46Laval 132L'Assomption 17Mascouche 17
Other trades in Saint-Mathias-sur-Richelieu
Finding a septic system contractor in Saint-Mathias-sur-Richelieu
In Saint-Mathias-sur-Richelieu, 2 companies are allowed by their RBQ licence to do septic system work. Before you ask a septic system contractor for a quote, check that the licence covers your job.
In the Montérégie region, 552 companies work in this trade across 120 cities; Saint-Mathias-sur-Richelieu has 2 of them (69th).
The choice is limited in Saint-Mathias-sur-Richelieu. Companies from nearby cities in the region, such as Montréal (234), Belœil (12) and Longueuil (33), may also serve your area: ask them.
The RBQ numbers: septic systems in Saint-Mathias-sur-Richelieu
2companies with an active licence
0new licences in 90 daysnone in the last 30 days
2have held their licence for 10 years or more100% · the oldest since 1984
1have a $40,000 licence bondand 1 at $20,000 · may compensate a client under RBQ rules
- All of them have a published phone number: you can call them directly.
- Most common subcategories: 2.2 Non-drilled water catchment works (2), 2.4 On-site wastewater (septic) systems (2), 1.4 Roads and pipelines (1).
Useful guides: Septic tank pumping: how often and what to check
Open data of the Régie du bâtiment du Québec as of November 4, 2026, updated every night.
Required licence, issuing body and subcategories for this trade: Septic systems in Greater Montréal.
Homes in Saint-Mathias-sur-Richelieu (2021 Census)
1,975households in a private dwelling
42%of dwellings built before 1981including 10% before 1961
79%of households own their home
75%of dwellings are single-detached houses
Source: Statistics Canada, 2021 Census, table 98-10-0233-01 (25% sample, rounded counts), Statistics Canada Open Licence.
Before you sign with a septic system contractor in Saint-Mathias-sur-Richelieu: check the licence on the day, ask for written quotes and avoid large deposits. Printable checklist before you sign →