---
title: Remediation Services in Mayo | Oil Spill Clean-Up | Verdé
description: Remediation services in Mayo from Verdé’s Castlebar office: 24/7 spill clean-up where 61% of homes heat with oil and 50% have their own septic tank.
canonical: https://verde.ie/remediation-services/mayo
updated: 2026-11-11
author: Verdé Environmental Group
---

# Mayo remediation services: 24/7 oil spill clean-up and groundwater work, from Verdé’s office in Castlebar

Verdé’s western office is in Moneen Industrial Estate, Castlebar. 31,601 of Mayo’s 51,996 households heat with oil, 11,247 with coal, peat or wood, and only 3% with natural gas ([Census 2022](https://www.cso.ie/en/census/census2022/census2022smallareapopulationstatistics/)).

- **61%** of Mayo households heat with oil
- **50%** have their own septic tank
- **24/7** spill line: 0818 714 002

Last updated 11 November 2026 by Verdé Environmental Group

## Key takeaways

- Verdé’s Castlebar office is at Units 3 & 4, Strathmore Place, Moneen Industrial Estate, F23 YV61; phone 094 907 3999.
- 61% of Mayo households heat with oil, against 39% nationally, and 3% with natural gas (Census 2022).
- About half of Mayo’s households, 25,811, have their own septic tank, and 32% are on a group water scheme.
- From Castlebar it is 17 km to Westport, 30 km to Ballina and 62 km to Belmullet in a straight line.

Verdé Environmental Group provides remediation services from a staffed office in Castlebar, County Mayo, that covers the west and north-west: Mayo, Galway, Sligo, Roscommon, Leitrim and Donegal. In Mayo it provides 24/7 oil spill clean-up for homes, farms and businesses, environmental consultancy, site investigation and solar PV.

This page is about County Mayo. Verdé’s Castlebar office also looks after Galway, Sligo, Roscommon, Leitrim and Donegal, and Galway itself is by appointment only. To read about a service rather than a place, start at [oil spill clean-up](https://verde.ie/oil-spill-clean-up) or [environmental consultancy](https://verde.ie/services/environmental-consultancy).

## What remediation and environmental work does Verdé do in County Mayo?

Verdé’s remediation services in County Mayo cover oil spill clean-up and groundwater work, alongside environmental consultancy, solar PV, site investigation and asbestos surveys, from its staffed office in Castlebar. The spill line, 0818 714 002, is open at any hour, and planned enquiries get a reply within one working day.

### Oil spill clean-up in Mayo

31,601 Mayo households burn oil for heat, 61% of the county against 39% nationally. For a leaking tank, line or boiler anywhere from Belmullet to Ballyhaunis, ring 0818 714 002 at any hour. [Oil spill clean-up](https://verde.ie/oil-spill-clean-up)

### Environmental consultancy in Mayo

Site assessments, monitoring and reports for planning applications, licences and land sales in Mayo. Castlebar is the office Verdé lists for six western and north-western counties. [Environmental consultancy](https://verde.ie/services/environmental-consultancy)

### Solar PV in Mayo

In 2024 Verdé fitted a 6.2 kWp solar PV system to a slate roof in Castlebar, with 10 kW of battery storage and optimisers to deal with shading on the panels. [Solar PV](https://verde.ie/services/solar-pv)

### Hydrogeology and groundwater in Mayo

16,669 Mayo households (32%) are on a group water scheme, four times the national share, and 2,892 have a private source of their own. Verdé’s hydrogeologists assess groundwater sources and the risks to them. [Hydrogeology and groundwater](https://verde.ie/services/water-hydrogeology)

### Site investigation drilling in Mayo

Trial pits, boreholes and soil sampling to find out what is in the ground before a Mayo site is bought, built on or cleaned up. Verdé runs its own drilling crews. [Site investigation drilling](https://verde.ie/services/drilling)

### Asbestos surveys and testing in Mayo

66% of Mayo households live in homes built in 2000 or earlier. The HSA flags pre-2000 buildings for asbestos checks before refurbishment or demolition, and Verdé carries out management surveys, refurbishment and demolition surveys and air testing. Ask first about a private house. [Asbestos surveys and testing](https://verde.ie/services/asbestos-survey-testing)

### A staffed office in the west

Castlebar is one of Verdé’s three staffed offices. Galway is by appointment only, so for Mayo, Galway, Sligo, Roscommon, Leitrim and Donegal, Castlebar is the staffed office.

### Core sampling in Westport

Verdé’s [testimonials](https://verde.ie/testimonials) include a Westport homeowner’s account of core sampling for pyrite testing: five holes outside, two of them below ground, and two inside, all filled in afterwards.

## How does Mayo heat its homes and treat its waste water?

61% of Mayo’s 51,996 households heat with oil, 22% with coal, peat or wood and 3% with natural gas (Census 2022). 50% have their own septic tank, twice the national share, and 32% are on a group water scheme.

Graphic: Oil heats 61% of Mayo homes, against 39% in Ireland; about half have a septic tank.

Oil heats 61% of Mayo’s 51,996 homes and coal, peat or wood 22%; about half have a septic tank and 32% are on a group water scheme. Census night, 3 April 2022. Source: [Central Statistics Office, Census 2022 Small Area Population Statistics](https://www.cso.ie/en/census/census2022/census2022smallareapopulationstatistics/).

**Data behind this graphic: households in County Mayo, Census 2022**

| Measure | Households in Mayo | Share in Mayo | Share in Ireland |
| --- | --- | --- | --- |
| Oil central heating | 31,601 | 61% | 39% |
| Natural gas central heating | 1,346 | 3% | 33% |
| Electric central heating | 4,321 | 8% | 12% |
| Coal, peat or wood central heating | 11,247 | 22% | 9% |
| Other fuel, no central heating or not stated | 3,481 | 7% | 8% |
| Water from a private source that is not a group scheme | 2,892 | 6% | 10% |
| Own septic tank | 25,811 | 50% | 25% |
| Home built in 2000 or earlier | 34,116 | 66% | 65% |
| All households | 51,996 | 100% | 100% |

### Oil and solid fuel

Between them, oil and solid fuel heat about 82 in every 100 Mayo homes. Natural gas, the main fuel in Dublin, reaches 3% of households here, so an oil tank beside the house is the norm.

### Septic tanks and group schemes

25,811 Mayo households have a septic tank and 16,669 are on a group water scheme. If either is close to a leak, or a neighbour’s is, say so on the first call.

### Buildings from before 2000

34,116 Mayo households live in homes built in 2000 or earlier. The HSA’s safety alert on asbestos picks out pre-2000 buildings as a particular concern when they are refurbished or demolished ([HSA](https://www.hsa.ie/eng/safety_alerts/2022/management_of_asbestos_containing_materials_on_demolition_refurbishment_sites/)).

## How far is Verdé’s Castlebar office from your town in Mayo?

Verdé’s Castlebar office is near the middle of the county. In a straight line it is 17 km from Westport, 24 km from Claremorris, 26 km from Ballinrobe, 30 km from Ballina and 62 km from Belmullet, the farthest of the towns listed.

**Towns in County Mayo: population and straight-line distance from Verdé’s Castlebar office**

| Town | Population, Census 2022 | Distance from Castlebar | Direction from the office |
| --- | --- | --- | --- |
| Castlebar | 13,054 | Verdé’s office is here | At the office |
| Westport | 6,872 | 17 km | west |
| Kiltimagh | 1,232 | 19 km | east |
| Claremorris | 3,857 | 24 km | south-east |
| Swinford | 1,459 | 24 km | north-east |
| Ballinrobe | 3,148 | 26 km | south |
| Crossmolina | 1,134 | 27 km | north |
| Ballina | 10,556 | 30 km | north |
| Charlestown | 1,172 (Charlestown and Bellahy together) | 34 km | east |
| Ballyhaunis | 2,773 | 35 km | east |
| Louisburgh | 367 | 36 km | west |
| Belmullet | Not listed separately | 62 km | north-west |

Distances run in a straight line from the Castlebar office to each town centre and are rounded to the nearest kilometre; positions come from [OpenStreetMap](https://www.openstreetmap.org/copyright). Mayo’s coast and mountains make the road to Belmullet or Louisburgh much longer than the line. Populations are Census 2022 built-up areas, and no figure is shown for Belmullet.

## Who do you tell about an oil spill in County Mayo?

Ring Verdé on 0818 714 002 for the clean-up, and tell Mayo County Council on 094 906 4000 if oil has reached a drain, a stream, a lake or someone else’s land. The EPA’s complaint guide points to the local authority first and lists a 24-hour national line, 1800 365 123.

**Who to tell about a spill or pollution in County Mayo**

| Who | What they do | How to reach them |
| --- | --- | --- |
| Verdé 24/7 spill line | Clean-up and the investigation after it, at any hour. | [0818 714 002](tel:0818714002) · Any hour, every day |
| Mayo County Council | Takes pollution reports anywhere in Mayo. | [094 906 4000](tel:+353949064000) · [environment@mayococo.ie](mailto:environment@mayococo.ie) |
| National Environmental Complaints Line | Pollution reports, day or night (EPA complaint guide). | [1800 365 123](tel:1800365123) · Open 24 hours, 7 days a week |
| Inland Fisheries Ireland | Rivers, streams, lakes and fish in distress. | [0818 34 74 24](tel:0818347424) · Confidential line, 24 hours |

### What to do in Mayo, by situation

- If oil is leaking now, from Ballina to Belmullet, then ring Verdé on [0818 714 002](tel:0818714002); the Castlebar office is in the county.
- If it has reached a drain, a stream or a neighbour’s land, then tell Mayo County Council on [094 906 4000](tel:+353949064000) as well.
- If it is night-time, or you do not know which council covers the place, then the national line, [1800 365 123](tel:1800365123), is open 24 hours.
- If a river, stream or lake is hit, or fish are in distress, then also ring Inland Fisheries Ireland on [0818 34 74 24](tel:0818347424).
- If the site holds an EPA licence, then report it under the licence; the EPA deals with licensed sites itself.
- If nothing is leaking and the work is planned, then use the [contact page](https://verde.ie/contact); Verdé replies within one working day.

Contact details are as printed in the EPA’s guide, [How to Make an Environmental Complaint](https://www.epa.ie/publications/compliance--enforcement/public-authorities/See-Something-Say-Something-%28English-Version%29-2025.pdf) (November 2025), which gives environment@mayococo.ie for written reports. With Mayo’s lakes and salmon rivers, Inland Fisheries Ireland’s line, 0818 34 74 24, is the second call when water is affected.

## What has Verdé done in County Mayo?

Verdé’s published Mayo work is a home solar installation in Castlebar and core sampling at a house in Westport. More case studies from the west will be added as Verdé approves them for publication.

- **Home solar PV with battery storage** (2024, Castlebar, Co. Mayo): 6.2 kWp system on a slate roof; 10 kW of battery storage, with optimisers to manage shading. [Read more](https://verde.ie/projects/solar-pv-residential-castlebar)
- **Core sampling for pyrite testing** (2022, Westport, Co. Mayo): Five holes outside, two of them below ground, and two inside; A client review on Verdé’s testimonials page. [Read more](https://verde.ie/testimonials)

## Is this right for you?

### This is a fit if

- A heating oil leak at one of the 31,601 Mayo homes that heat with oil, six in every ten.
- A spill near a shared supply: 32% of Mayo homes are on a group water scheme.
- A leak at a rural home with a septic tank, like about half of Mayo homes, where soil and groundwater need checking.
- Solar PV with battery storage, like the home system Verdé installed in Castlebar.
- An escape of oil claim anywhere in Mayo that needs sampling and a written report.

### This is not a fit if

- Asbestos removal: Verdé surveys and tests, and a specialist contractor removes it.
- A boiler service or a fuel delivery, which is for a heating engineer or a fuel supplier.
- A fire or an injury: ring 999 or 112 first.

Unsure whether it is a job for Verdé? Ring the Castlebar office on [094 907 3999](tel:+353949073999) or email castlebar@verde.ie, and someone who knows the county will tell you.

## What should you weigh up before choosing a firm in Mayo?

In the west, the question that separates firms is whether they have people here or send them from the east. After that it is the hours of the spill line, who does the work and what is certified. Verdé’s answers for Mayo are below.

**Verdé in County Mayo, by the things a buyer compares**

| Criterion | Verdé | What it means for you |
| --- | --- | --- |
| Nearest staffed office | Castlebar office | In the county, in Castlebar. The towns listed on this page are between 17 km (Westport) and 62 km (Belmullet) away in a straight line. |
| Council for pollution reports | Mayo County Council, 094 906 4000 | The EPA’s guide says to tell the local council first. |
| Staffed office for the west | Castlebar | Galway is by appointment only. |
| Spill line | 0818 714 002, at any hour | Answered day and night, every day of the year. |
| Track record | Since 2002, with more than 6,000 oil spill projects | ISO 9001, ISO 14001 and ISO 45001 certified. |
| Price | Quoted once the site and the scope are known | No fixed price is published. |

## Remediation services in County Mayo: questions people ask

### Does Verdé have an office in Mayo?

Yes. Verdé’s Castlebar office is at Units 3 & 4, Strathmore Place, Moneen Industrial Estate, Castlebar, F23 YV61. The phone number is 094 907 3999 and the email is castlebar@verde.ie. It is one of Verdé’s three staffed offices, with Kilcoole in County Wicklow and Cork.

### How many homes in Mayo heat with oil?

31,601 households, 61% of the 51,996 in County Mayo, on census night in April 2022. A further 11,247 (22%) heat with coal, peat or wood. Only 1,346 households, 3%, have natural gas, against 33% nationally.

### Who do I report an oil spill to in Mayo?

Mayo County Council, on 094 906 4000 or environment@mayococo.ie, is the public body to tell. The National Environmental Complaints Line, 1800 365 123, is open 24 hours a day. If a river or lake is affected, ring Inland Fisheries Ireland on 0818 34 74 24. For the clean-up, ring Verdé on 0818 714 002.

### Does the Castlebar office cover Galway, Sligo and Roscommon?

Yes. Castlebar is the office Verdé lists for Mayo, Galway, Sligo, Roscommon, Leitrim and Donegal. Galway itself is by appointment only, so Castlebar is the nearest staffed office for the whole of the west and north-west. The spill line for every county is 0818 714 002.

### Oil has leaked near my septic tank. What should I do?

Ring 0818 714 002 and say that there is a septic tank, and where it drains to. 25,811 Mayo households, 50% of the county, have one. Verdé’s clean-up starts by stopping the oil spreading along the ground and into drains and watercourses, then recovers it and treats the soil.

### Does Verdé install solar panels in Mayo?

Yes. In 2024 Verdé fitted a 6.2 kWp system with 10 kW of battery storage to a slate roof in Castlebar, using optimisers to manage shading. 26% of Mayo households reported a renewable energy source in Census 2022. The [solar PV](https://verde.ie/services/solar-pv) page explains the service.

### Is there a call-out time for Mayo?

No fixed arrival time is published. The spill line, 0818 714 002, is open at any hour and the duty engineer confirms the response on the call. In a straight line Castlebar is 30 km from Ballina and 62 km from Belmullet; by road, north and west Mayo are a good deal further.

### Is Verdé’s Galway location an office?

No. Galway is by appointment only. Verdé’s three staffed offices are in Castlebar, in Kilcoole, County Wicklow, and in Cork. For work in Galway or anywhere else in the west, Castlebar is the office to ring, on 094 907 3999.

## Terms used on this page

- **Group water scheme**: A water supply run by a local group of households rather than the public main. 32% of Mayo homes are on one, against 8% nationally.
- **Septic tank**: A tank that treats a home’s waste water on site where there is no public sewer. About half of Mayo households have one.
- **Solid fuel**: Coal, peat or wood. It heats 22% of Mayo homes.

## Sources and further reading

1. [Census 2022 Small Area Population Statistics](https://www.cso.ie/en/census/census2022/census2022smallareapopulationstatistics/). Central Statistics Office, 2023. Mayo’s heating fuels, group water schemes and septic tanks, with building age and town populations.
2. [How to Make an Environmental Complaint](https://www.epa.ie/publications/compliance--enforcement/public-authorities/See-Something-Say-Something-%28English-Version%29-2025.pdf). Environmental Protection Agency, 2025. Mayo County Council’s contact details and the order to report in.
3. [What our clients say](https://verde.ie/testimonials). Verdé Environmental Group, checked 11 November 2026. The client review of core sampling at a house in Westport.
4. [Contact us](https://fisheriesireland.ie/contact-us). Inland Fisheries Ireland, checked 11 November 2026. The 24-hour line for pollution in rivers and lakes.
5. [Safety alert: asbestos-containing materials on demolition and refurbishment sites](https://www.hsa.ie/eng/safety_alerts/2022/management_of_asbestos_containing_materials_on_demolition_refurbishment_sites/). Health and Safety Authority, 2022. Why buildings from before 2000 need an asbestos check before work starts.
6. [OpenStreetMap](https://www.openstreetmap.org/copyright). OpenStreetMap contributors, checked 11 November 2026. Positions of Castlebar, Ballina, Westport and the other Mayo towns.
7. [Contact Verdé: Kilcoole, Castlebar and Cork](https://verde.ie/contact). Verdé Environmental Group, checked 11 November 2026. The Castlebar office address and phone number.

## Tell us what is happening in Mayo

### What we ask for

- The address or Eircode, or the nearest town, from Ballina to Belmullet.
- What it is: a leak, a survey, an assessment, dewatering or solar.
- For a leak: what leaked, roughly how much, and whether it reached a drain, a stream or a well.
- For planned work: the date you need it by, and any planning or licence reference.

Reply: Within one working day.

For a spill or pollution incident, phone [0818 714 002](tel:0818714002) at any hour.

[Send an enquiry](https://verde.ie/contact?county=mayo) · [Call 0818 714 002](tel:0818714002)

## More counties Verdé covers

- [County Wicklow](https://verde.ie/remediation-services/wicklow): Home of Verdé’s head office and laboratory in Kilcoole.
- [County Dublin](https://verde.ie/remediation-services/dublin): Basement dewatering, city solar and spill response from Kilcoole.
- [County Kildare](https://verde.ie/remediation-services/kildare): Dewatering in Naas and oil spill response across the county.
- [County Cork](https://verde.ie/remediation-services/cork): Verdé’s Cork office at Airport East covers city and county.
- [Remediation services by county](https://verde.ie/remediation-services): The three offices and the counties each one looks after.

## Related pages

- [Oil spill clean-up](https://verde.ie/oil-spill-clean-up): The 24/7 line and the four stages of a clean-up.
- [The first hour of a heating oil leak](https://verde.ie/news/home-heating-oil-leak-first-hour): What to do at the tank before anyone arrives.
- [Environmental consultancy](https://verde.ie/services/environmental-consultancy): Assessments, audits and reports, by project stage.
- [Solar PV](https://verde.ie/services/solar-pv): Solar for homes, businesses and larger sites.
- [Site investigation drilling](https://verde.ie/services/drilling): Drilling methods, monitoring wells and boreholes.
- [Hydrogeology and groundwater](https://verde.ie/services/water-hydrogeology): Groundwater sources, protection and monitoring.