The 5 Best Septic Tank Companies in Ireland
We extensively test and research all services we review. Here's why you can trust us.

The 5 Best Septic Tank Companies in Ireland

Households may depend on a septic tank to treat and dispose of wastewater. But, a failing septic system can easily be a public health concern that starts with a bad smell.

However, foul odour isn’t always the first sign of a malfunctioning septic tank in Ireland. Initially, you can check for clogged drains with the best drain cleaning companies in Dublin or other cities nearby.

And if a bigger problem exists, perhaps it’s time to look into some septic tank experts. For this, it’s vital to consider the costs.

How Much Do Septic Tank Services in Ireland Cost

For installations, the cost of a septic tank in Ireland ultimately depends on its size. For upgrades, experienced project managers should assess the situation first.

There are now grants of up to 85% of the cost towards upgrading or replacing septic systems. Make sure to discuss this with your chosen company for more information.

Here are some estimates for initial reference:

ServicesEstimated Costs
Septic Tank Purchase€950 to €5,200
Installation of Wastewater or Sewage Treatment Systems€2,500 to €3,500
Septic Tank Upgrades (depends on soil conditions, site access, and no. of room dwelling)€5,500 to €15,500

The Best Septic Tank Companies in Ireland 

We assessed some companies offering the best services for septic tanks in Ireland based on the following criteria:

We considered the opening hours and how frequent we can reach the septic tank companies.
The staff must be effective and efficient from the assessment to the installation or upgrade
This measures the staff’s level of responsiveness and how well they explain the project details.
Affordability is a bonus, but we want customers to be satisfied with how much they paid overall.

1. Bluestream Waste Water Services

Bluestream Waste Water Services Homepage
SERVICESSeptic Tank Cleaning & Upgrades, Wastewater Systems, Percolation Solutions
ADDRESS6G22+H8, Hempstown, Blessington, Co. Wicklow, Ireland
CONTACT DETAILSPhone: 045 851 801

Free Phone: 1850 211 921

[email protected]

OPERATING HOURSMonday - Friday: 8:00 AM - 6:00 PM

Saturday: 9:00 AM - 1:00 PM

SERVICE★★★★★ (5/5)
VALUE★★★★★ (5/5)

Known for their professional office staff and septic tank operatives, Bluestream Waste Water Services is among our top choices.

Right off the bat, they arrived at our house on time and were very knowledgeable. They also explained everything in the most amicable way. 

Because of this, we believe they would be a good fit, especially for new homeowners who don’t have a single clue about septic tanks. 

There was a tonne of work to do but they were unfazed by this challenge. Their team also remained determined even during awful weather conditions.

A customer shared he was satisfied with the modern tank they installed. He’s happy that it’s now safer for kids and pets at their location.

The staff went above and beyond by offering to unblock our drain system as well. The work was done quickly and efficiently.

We appreciate how thorough they were. More specifically, their staff made regular visits to the site to ensure proper implementation.

Moreover, their customer service was courteous and responsive every time we contacted them.

Nonetheless, it seems that some of their website information could be outdated. Their prices also occasionally change without prior notice. 

For these details, it’s best to check with them first to be sure.

All in all, our site was left in good condition at the best price. Bluestream Waste Water Services is a reliable company for septic tanks in Ireland!


  • Open 6 days a week
  • Courteous and knowledgeable staff
  • Responsive customer service
  • Quick and efficient services
  • Hardworking even during bad weather


  • Some website info may be outdated
  • Prices are subject to change without notice

Customer Reviews

Very professional

“Great company to deal with. Arrived at our house and thoroughly cleaned out a very full tank. There was a lot of work in it and the operator Nick Casey was very professional and explained everything to me. He deserves a pay rise…. many thanks, Bluestream.” – Mark Acres

Highly recommended

“Would recommend Bluestream to any prospective customer as the attention to detail along with very helpful and professional performance. I have used Bluestream for the past three years and can only say that I would not go to another service provider.” – Stephen Laming

2. SEPCON Sewage Treatment Systems

SEPCON Sewage Treatment Systems Homepage
SERVICESSeptic Tank Upgrading & Replacements, New Build Installations, Survey & Design Services, Commercial Sewage Solutions, Sewage Survey System & Repairs, Sewage Treatment Systems
ADDRESSMoyglare Rd, Newtownmoyaghy, Kilcock, Co. Kildare, W23 TCP3, Ireland
CONTACT DETAILS+353 1 628 7300

[email protected]

SERVICE★★★★★ (5/5)
VALUE★★★★★ (5/5)

With their seamless assistance, SEPCON Sewage Treatment Systems is more than ready to service your septic tank in Ireland.

Some of our most significant concerns include our tank’s smell and function. We didn’t want to make any more mistakes and needed a trustworthy company to forward our problems to.

Lucky for us, they’re open 24 hours a day! From the first call, we were impressed by their patience in letting us understand the whole process. 

They demonstrated great expertise, gave us great advice to improve our septic tank system, and made our transaction uncomplicated.

Their punctuality was also much appreciated. It was a delight that the surveyor who inspected our water disposal system was professional and careful in his approach too.

Occasionally, they took some time to respond and their phone lines had some issues. But once they got to us, their work made up for it.

Honestly, we expected a giant mess in our location but were pleasantly surprised at how neat they were. They were also efficient enough to complete their work earlier than expected.

Several customers also had no issues getting annual services from SEPCON because of their quick and valuable efforts.

In addition, they gave clear and concise answers to all our queries. We’re happy to get our peace of mind with our septic tank.

Booking SEPCON Sewage Treatment Systems is among the most satisfactory decisions we’ve made. You can do the same too!


  • Open 24 hours a day
  • Punctual and efficient
  • Patient and accommodating
  • Neat and organised
  • Gives clear and concise answers


  • Occasionally takes time to respond
  • Phone lines can sometimes have issues

Customer Reviews

Very happy

“Kenneth showed up on time, was friendly and professional and went beyond what was required to make sure the system was working well and would continue to work well in the future. I’m very happy with the service.” – Ciaran Buckley

Everything was on time

“A really professional company to deal with. I have to hand it to them everything was on time and done smoothly. The system has just been installed so I’m hoping to remain a customer with them for any future services required.” – Philip Ryan

3. Coakley Septic Tank Cleaning

Coakley Septic Tank Cleaning Homepage
SERVICESSeptic Tank Cleaning & Maintenance, Drain Cleaning
ADDRESSOld Carton, Maynooth, Co. Kildare, Ireland

+353 86 253 2351

[email protected]

SERVICE★★★★★ (5/5)
VALUE★★★★★ (5/5)

Emptying a septic tank in Ireland is a tricky job – but not so much for Coakley Septic Tank Cleaning!

We were lucky that their team arrived on the day we contacted them. They worked fast and emptied our tank in 20 minutes!

Their service was prompt at a very reasonable price and we couldn’t ask for more.

One of their other clients was also happy to acquire their services on a holiday weekend! We were amazed how they stayed true to being reachable all day, every day.

This speaks volumes of their dedication to helping their clients and they should be proud of their work. This isn’t a surprise at all when we heard they’ve been in the business for 25 years!

Before, we also didn’t understand what caused our septic tank issues. Thankfully, their team took the time to explain the root of our concerns and what to do if it ever happens again.

They were quick to answer whenever we called them on the phone as well. Their availability and reliability are on point!

We just hope their website can still be improved with more organised information. This would help beginners better navigate their services before finally reaching out to them.

In general, they provided us with clean and efficient results. Because of this, we urge you to reach Coakley Septic Tank Cleaning to rid of your septic tank issues.


  • 25 years of experience
  • Open 24 hours a day
  • Works fast
  • Reasonable pricing
  • Quick to answer on the phone


  • Organisation of the website can be improved
  • Not that active on social media

Customer Reviews

Excellent and efficient

“Excellent service. Efficient and clean job. Shaun also took the time to tell me more about the system I have.  Cannot recommend highly enough.” – Brian K

Great job

“Top Class service, left the tank spotless, very conscientious, took the time to do the job right, very knowledgeable about septic tanks gave some suggestions which we will definitely be using. Great Job, Great Value!” – Karl Mooney

4. O’Reilly Oakstown Environmental

O'Reilly Oakstown Environmental Homepage
SERVICESSeptic Tank Upgrades, Commercial Water, Domestic Water, Agricultural Solutions
ADDRESSOakstown, Trim, Co. Meath, C15 X499, Ireland
CONTACT DETAILS+353 46 943 1389

[email protected]

OPERATING HOURSMonday - Friday: 8:00 AM - 5:30 PM
SERVICE★★★★★ (5/5)
VALUE★★★★★ (5/5)

A standout in the wastewater treatment industry, O’Reilly Oakstown Environmental’s services for septic tanks in Ireland is highly recommended.

We initially thought we had a difficult site to work on. We were worried that if our issues were not dealt with immediately, that these may cause pollution problems harmful to our health.

However, it was brilliant that their team supplied us with consistently good service from the start. They discussed everything with diagrams to thoroughly demonstrate the septic tank upgrades.

High standards were set with the quality of their products and services as well – we enjoyed hassle-free, minimal maintenance!

Customers can also get a hold of their modern systems with an internal control panel. The safeguards, monitoring, and alarms built into the system were amazing, although we didn’t find the need to use any of them.

A customer we spoke to also shared that they bought a tank from them more than a decade ago and are still happy with it! 

Their customer care was second to none, with their staff being both helpful and efficient. They explained everything carefully and persevered until our septic tank was fully functional again.

But compared to several other top septic tank companies, they’re not open 24/7. With their good services, losing customers on the weekend seems like a waste.

If you’re considering an upgrade or a new build, get peace of mind by installing the latest wastewater treatment system from O’Reilly Oakstown Environmental!


  • Knowledgeable team
  • Good customer service
  • Low maintenance
  • Informative website
  • Offers septic tank grants
  • Prioritises reducing carbon footprint


  • Closed during the weekend
  • Not that active on social media

Customer Reviews


“Bought tank of O Reillys Oakstown 11 years ago, and they supply a brilliant service as soon as you have a problem they get to you as quick as they can. Top marks to the guy who called out today, very good at his job and tidy 👍🏼 ” – Patrick Forde

Extremely efficient

“Excellent service from this company, their aftersales care has been second to none, have dealt with Chris and Tommy, both gentlemen have been extremely efficient and courteous, would highly recommend this company” – Teresa McCausland

5. M&T Plant Hire Ltd.

M&T Plant Hire Ltd. Homepage
SERVICESSeptic Tank Emptying, Compost Production, Drain Cleaning, Water Leak Detection, Civil Engineering, CCTV Surveying, Traffic Management
ADDRESSEnniscorthy Road, Ballyeden, Clonroche, Co. Wexford, Ireland
CONTACT DETAILSTel: (053) 9244654

Mobile: (087) 2212535

[email protected]

SERVICE★★★★★ (5/5)
VALUE★★★★★ (5/5)

M&T Plant Hire Ltd. is ready to provide you countless services such as cleaning drains, detecting water leaks, and emptying your septic tanks in Ireland.

From when we reached out to them, the staff on the phone was already lovely to deal with. They immediately addressed the issues we had with our septic tank.

We contracted their team to empty and clean our system. They got here within work hours and had the right long-distance equipment required for the job.

They also made sure their inspection was thorough and everything ended up working at its best.

The staff who fixed the tank were polite, professional, and obliging as well. They gave us an informative insight into our biggest concerns.

One of their previous customers told us that during an emergency, they were in awe of this company’s quick turnaround. This just shows their reliability and good work ethic!

It was also amazing to know that with 30 years of experience, they have evolved and diversified their core capabilities. They deal with compost production, CCTV survey, and traffic management too!

Just to note, information about these services may be a little hard to read because of their website’s bright blue background and very thin text.

But all things considered, we paid a reasonable price for M&T Plant Hire Ltd.’s services for our septic tank in Ireland. Let them handle your septic system with no worries!


  • Open 24 hours a day
  • 30 years of experience
  • Polite and professional team
  • Quick turnaround
  • Reasonable pricing


  • Website text can be hard to read (bright blue background)
  • Doesn’t regularly update on online platforms

Customer Reviews

Lovely to deal with

“The woman on the phone was lovely to deal with and organised a quick response to the issues at the house. The two guys who came out were professional, polite and very obliging. Most importantly they fixed the problem and didn’t rip me off!” – Caroline Storey

Very helpful and efficient

“Pat was very helpful and efficient. Reasonably priced as well. We have found our drain saviour!” – J M

FAQs About Septic Tank in Ireland

There you have it! We hope you liked our review of the companies offering the best services for septic tanks in Ireland. 

If you want to find more septic tank-related services, start with our review of the best plumbers in Waterford to learn more!