Septic System Repair Cornwall — Fixed Fast
Sewage backing up into the basement, standing water over the leaching bed, a cracked tank, a dead pump or an alarm that won't stop? We find the real cause — not just the symptom — and repair it the same day where possible. Serving Cornwall, Long Sault, Ingleside, Lancaster, Alexandria and rural SD&G with flat-rate pricing and honest advice on whether to repair or replace.
Septic System Repair That Fixes the Cause, Not the Symptom
A tank that backs up twice a year isn't "just full." A pump that keeps dying isn't "a bad batch." Something upstream is wrong, and replacing parts until it stops is the expensive way to find out what. Our technicians diagnose first — camera, probe, water test — then tell you exactly what failed and what it takes to fix it, in writing, before a shovel goes in the ground.
We repair every part of a septic system across Cornwall, SD&G and Prescott-Russell: pumps and floats, alarm panels, inlet and outlet baffles, cracked concrete and steel tanks, crushed or root-filled lines, failed distribution boxes and saturated leaching beds. Same-day for emergencies, and an honest answer when repair isn't worth it.
- Effluent pump & float replacement
- Septic alarm diagnosis & panel repair
- Sewage backup clearing & line repair
- Leaching bed & distribution box repair
- Cracked tank sealing or replacement
- Baffle, riser & lid replacement
Signs Your Septic System Needs Repair
Don't wait for raw sewage in the yard. These are the problems that turn into emergency septic repairs when they're ignored.
Septic Alarm Going Off
A red light or buzzer on the control panel means the effluent pump has stopped or the float is stuck and the chamber is filling. You have hours, not days, before it backs up. Silence the buzzer, stop using water, and call.
Broken Septic Pump
Pumps on raised-bed and pressurized systems run thousands of cycles a year. When one burns out, nothing moves from the tank to the bed. We stock replacement pumps and floats on the truck for same-visit swaps.
Sewage Backup Into the House
Water rising in the basement floor drain, shower or lowest toilet means the tank is full, the outlet is blocked, or the line to the tank is crushed. This is a same-day emergency — stop running water and call us.
Septic Bed Problems
Soggy ground, standing water or bright green stripes over the leaching bed mean effluent is surfacing instead of soaking in. Sometimes it's a clogged distribution box or crushed lateral; sometimes the bed is biologically failed. We find out which before quoting.
Cracked Septic Tank
Old steel tanks rust through; concrete tanks crack with frost and ground movement. The giveaway is a tank that's always full of groundwater after rain, or always low between pump-outs. Small cracks can be sealed; a rotted tank has to come out.
Slow Drains & Gurgling
If every fixture drains slowly and the toilets gurgle when the washer empties, the problem is past the house plumbing and into the system. Caught here, it's usually a cheap fix. Ignored, it becomes one of the five above.
Septic Emergency? We Answer 24/7.
Backup, alarm or a tank that won't stop filling — call now and a technician is on the way to anywhere in Cornwall, SD&G or Prescott-Russell.
When a Septic Repair Makes Sense — and When It Doesn't
The biggest fear we hear is "they'll tell me I need a whole new system." Most of the time you don't. Here's how we decide, and we'll show you the evidence on site.
We Repair When
- A pump, float, alarm or baffle has failed
- A line is crushed, root-blocked or separated
- The distribution box is clogged or tilted
- A concrete tank has a sealable hairline crack
We Recommend Replacing When
- A steel tank has rusted through
- The leaching bed is biologically failed (biomat)
- The system is undersized for the home
- Repairs would cost more than half a new system
Either way you get a written flat-rate price and a plain-language explanation. If it's a replacement, we handle the design, permit and install too.
Septic Repair in Cornwall — Common Questions
My septic alarm is going off — what should I do right now?
Press the silence button, stop running water (no laundry, showers or dishwasher), and call us. The alarm means the pump chamber is filling because the pump or float has failed. Most alarm calls are fixed in one visit with a new pump or float — but the chamber only has a few hours of reserve.
How much does septic repair cost in Cornwall and SD&G?
It depends on what failed. A float or baffle is a few hundred dollars; a pump replacement runs higher; a crushed line or distribution box involves excavation. We diagnose first, then quote a flat rate in writing — you never pay for parts thrown at a guess.
Sewage is backing up into my basement — is that a septic tank repair or a plumbing problem?
If every fixture in the house is affected, it's almost always the septic side — a full tank, a blocked outlet baffle or a crushed line between the house and tank. A single slow drain is more likely plumbing. Call us either way; we'll tell you on the phone which it sounds like.
Can a failed septic bed be repaired, or does it have to be replaced?
Often it can. A soggy leaching bed is frequently a clogged distribution box, a crushed lateral or a tank that's been pushing solids into the bed — all repairable. If the soil itself has sealed with biomat, the bed needs replacing. We probe and water-test before telling you which it is.
How do I know if my septic tank is cracked?
A tank that fills with groundwater after every rain, or sits unusually low between pump-outs, is leaking somewhere. We confirm it by pumping the tank and inspecting the walls and seams. Hairline cracks in concrete can be sealed; rusted-through steel tanks are replaced.
Do you offer emergency septic repair on nights and weekends?
Yes — 24/7 across Cornwall, SD&G and Prescott-Russell. Backups, alarms and overflowing tanks are treated as same-day calls, and our trucks carry pumps, floats and baffles so most emergency repairs are completed on the first visit.
Will a septic system repair need a permit?
Like-for-like repairs — pumps, floats, baffles, a section of pipe — don't. Replacing the tank or any part of the leaching bed does, through South Nation Conservation under OBC Part 8. If your repair crosses that line, we file the permit and book the inspection for you.
Book Septic Service in Cornwall
Pumping, cleaning, inspection, repair or a new system — leave your details and we'll call back with a flat-rate price.
Need It Today?
Backups, alarms and overflowing tanks don't wait. Our emergency line is open 24/7.
(613) 702-1122Request a Callback
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What Customers Say About Our Septic Repair Service
Alarms, backups, failed pumps and cracked tanks — fixed for homeowners and businesses across Cornwall, SD&G and Prescott-Russell.
Septic alarm started screaming at 6am on a Sunday. Typed "septic repair near me" and they were the only ones who answered. Tech was here by 9, swapped the dead pump and a stuck float, tested it twice and left. We never had to stop using water for more than a few hours.
Kevin T.
St. Andrews West · Oct 2026
Sewage came up the basement floor drain the night before Thanksgiving. They came out that evening, pumped the tank to get us through the holiday, then came back and replaced a crushed line between the house and tank. Honest about what was urgent and what could wait a day.
Nathalie B.
Lancaster · Oct 2026
Two other companies told me the leaching bed was shot and quoted a full replacement. These guys probed it, found the distribution box had tilted and was dumping everything into one line. Fixed the box, bed drained fine. Saved me probably fifteen grand with one septic system repair.
Gilles R.
Avonmore · Sep 2026
Old steel tank on our farmhouse was always full of groundwater after rain. Searched "septic tank repair near me" and booked them for an inspection. They pumped it, showed me the rusted-through wall with a flashlight, and gave a straight answer: not repairable. Had a new tank in within the week.
Lisa W.
Finch · Aug 2026
Run a small motel outside Morrisburg. Pump on the main system failed on a full Friday night — 14 rooms and no septic. They had a replacement pump in by midnight and nobody checked out early. That's the kind of emergency septic repair you remember.
Paul D.
Morrisburg · Jul 2026
Toilets gurgled every time the washer drained and the yard over the tank smelled. Turned out the outlet baffle had rotted off and solids were heading for the bed. Replaced the baffle, added an effluent filter and a riser so it's easy to check. Quick, clean septic repair at the price they quoted.
Andrea C.
Embrun · Jun 2026
Septic Services Across Cornwall, SD&G & Prescott-Russell
Based at 17171 Cornwall Centre Rd in South Stormont — same flat-rate pricing whether you're inside city limits or at the end of a concession road.
Our Office
17171 Cornwall Centre Rd, Unit 7
South Stormont, ON K0C 1P0
Cornwall & Glengarry
Stormont & Dundas
Prescott-Russell
Don't see your township? (613) 702-1122 — we cover all of SD&G and Prescott-Russell.