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Slims & Berthiaume Sewer Service Inc says on its website that Slim's Sewer Service, now joined with Joseph Berthiaume & Sons, has provided septic services in the central Massachusetts areas since 1956 to residential and commercial customers. The company lists 24/7 emergency service. A 2025 customer wrote that the company had pumped their septic many times, and that on one call it came right out, quickly diagnosed the problem and explained it. A 2025 customer said Jason B remedied a horribly clogged sewer line after another company couldn't. A 2025 customer who called the company for a third opinion said it saved them close to $10k on a repair another company said was required. That 2025 customer also said they got a callback the next day and someone was available to do the work within a couple of days. A 2023 customer said they needed an emergency septic tank pump and the company got somebody there quickly, and that when it came out again for a new issue, the technician fixed the problem. A 2025 customer said they were billed for an extra 500 gallons on a tank pumping, and that a different company later said the tank had not been pumped out six months earlier. That 2025 customer said they had yet to hear back after asking for compensation.
Slims and Berthiaume in Charlton have pumped my septic many times and it has always been a great experience. They are very quick to respond every time I have called for service. One time I was particularly impressed because not only did they come right out, they also quickly diagnosed the problem and explained it to me in a way I could understand. No hard up sell, no runaround, just straight forward work at a very fair price. I also really appreciate that they are a locally owned business. One time I called with a question and wound up talking to the owner and didn't even realize it at first. You can tell they take pride in their community and customer service. I highly recommend them if you want dependable, fair, and truly professional service!
Wonderful family owned business. Can't say enough good things about this company. Jason B was able to remedy our horribly clogged sewer line after another company couldn't. Thanks Slims & Berthiaume Sewer Service. Outstanding job!!!
Made an appointment to get my tank pumped. Allegedly they came while I was at work and told me my tank was 1500 gallons not 1000 like I had told them. So they billed me for the extra 500 gallons and coming to find out never touched my tank at all. 6 months later my tank is overfilled so I called a different company. They said there's no way this was pumped out 6 months ago and it is 1000 gallons not 1500 like I said. Tried contacting them for some kind of compensation but have yet to hear from anyone. Horrible customer service stay clear of these clowns.
Thank goodness I called these guys for a third opinion! Their expertise and persistence saved me close to $10k for a repair another company said was required to fix the problem. (The other company charged hundreds of dollars, left a mess in my basement, and didn’t actually fix anything.) Scheduling with Slims and Berthiaume was very convenient and fast — I got a callback the next day and someone was available to do the work within just a couple of days. Price was very reasonable considering the time spent and the number of people involved. And everything in my house was left in great condition. I recommend the company without hesitation and will be using them for follow-up maintenance and all future work.
I needed an emergency Septic tank pump in July and never used Slims before. The lady on the phone was very nice and was able to get somebody there quickly even though they were very busy. The technician was very friendly. A few days ago they had to come out again because I had a new issue. Again, the technician was very friendly and knowledgeable, offered good advice and fixed my problem. Slims is a friendly, trustworthy company who does good work. I would recommend them to anybody.
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2 changes recorded — last scanned Sep 29, 2026.
Septic system installed with an engineer3.0