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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).

Send an enquirySpill now? Call 0818 714 002

Last updated by Verdé Environmental Group

Straight-line distances from Verdé’s Castlebar office. Larger dots are larger towns.

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

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 or 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.

  • Green domestic heating oil tank on a gravel base beside a house

    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.

  • Environmental licence papers and a hard hat on a desk at an industrial site

    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.

  • White Irish cottage with black solar panels across its roof

    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.

  • Water sampling kit and bottles set up beside a lake

    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.

  • Tracked drilling rig over a new borehole on a site

    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.

  • 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.

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 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.

How County Mayo heats its homesOil heats 61% of Mayo homes, against 39% in Ireland; about half have a septic tank.How homes are heated, share of householdsCounty Mayo61% oilIreland39% oilOil61%Natural gas3%Electricity8%Coal, peat or wood22%Other, none or not stated7%Water from a private sourceMayo6%Ireland10%Own septic tankMayo50%Ireland25%Home built in 2000 or earlierMayo66%Ireland65%
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.
Data behind this graphic: households in County Mayo, Census 2022
MeasureHouseholds in MayoShare in MayoShare in Ireland
Oil central heating31,60161%39%
Natural gas central heating1,3463%33%
Electric central heating4,3218%12%
Coal, peat or wood central heating11,24722%9%
Other fuel, no central heating or not stated3,4817%8%
Water from a private source that is not a group scheme2,8926%10%
Own septic tank25,81150%25%
Home built in 2000 or earlier34,11666%65%
All households51,996100%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).

Mayo and Ireland, in squares. Each grid is 100 households; filled squares are the Census 2022 share.

  • Heat with oil

    61% Mayo

    39% Ireland

  • Water from a private source

    6% Mayo

    10% Ireland

  • Own septic tank

    50% Mayo

    25% Ireland

  • Home built in 2000 or earlier

    66% Mayo

    65% Ireland

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.

From Castlebar, in a straight line. Each town in Mayo on a kilometre scale from Verdé’s office.
  1. Verdé, Castlebar: 0 km

  2. Castlebar1 km

  3. Westport17 km

  4. Kiltimagh19 km

  5. Claremorris24 km

  6. Swinford24 km

  7. Ballinrobe26 km

  8. Crossmolina27 km

  9. Ballina30 km

  10. Charlestown34 km

  11. Ballyhaunis35 km

  12. Louisburgh36 km

  13. Belmullet62 km

Mayo distance and contact check

Pick your town and what you need. You get the distance from Castlebar and the number to ring.

Which town in Mayo are you nearest?
What do you need?

Pick your town and what you need. The answer gives the distance and who to ring.

Every town and distance as a table
Towns in County Mayo: population and straight-line distance from Verdé’s Castlebar office
TownPopulation, Census 2022Distance from CastlebarDirection from the office
Castlebar13,054Verdé’s office is hereAt the office
Westport6,87217 kmwest
Kiltimagh1,23219 kmeast
Claremorris3,85724 kmsouth-east
Swinford1,45924 kmnorth-east
Ballinrobe3,14826 kmsouth
Crossmolina1,13427 kmnorth
Ballina10,55630 kmnorth
Charlestown1,172 (Charlestown and Bellahy together)34 kmeast
Ballyhaunis2,77335 kmeast
Louisburgh36736 kmwest
BelmulletNot listed separately62 kmnorth-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. 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 ring in Mayo, step by step

  1. If oil is leaking now, from Ballina to Belmullet

    Then ring Verdé on 0818 714 002; the Castlebar office is in the county.

  2. If it has reached a drain, a stream or a neighbour’s land

    Then tell Mayo County Council on 094 906 4000 as well.

  3. If a river, stream or lake is hit, or fish are in distress

    Then also ring Inland Fisheries Ireland on 0818 34 74 24.

  4. If it is night-time, or you do not know which council covers the place

    Then the national line, 1800 365 123, is open 24 hours.

Who to tell about a spill or pollution in County Mayo
WhoWhat they doHow to reach them
Verdé 24/7 spill lineClean-up and the investigation after it, at any hour.0818 714 002 · Any hour, every day
Mayo County CouncilTakes pollution reports anywhere in Mayo.094 906 4000 · environment@mayococo.ie
National Environmental Complaints LinePollution reports, day or night (EPA complaint guide).1800 365 123 · Open 24 hours, 7 days a week
Inland Fisheries IrelandRivers, streams, lakes and fish in distress.0818 34 74 24 · 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; 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 as well.

  • If it is night-time, or you do not know which council covers the place

    then the national line, 1800 365 123, 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.

  • 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; Verdé replies within one working day.

Contact details are as printed in the EPA’s guide, How to Make an Environmental Complaint (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.

See all of Verdé’s case studies

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 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
CriterionVerdéWhat it means for you
Nearest staffed officeCastlebar officeIn 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 reportsMayo County Council, 094 906 4000The EPA’s guide says to tell the local council first.
Staffed office for the westCastlebarGalway is by appointment only.
Spill line0818 714 002, at any hourAnswered day and night, every day of the year.
Track recordSince 2002, with more than 6,000 oil spill projectsISO 9001, ISO 14001 and ISO 45001 certified.
PriceQuoted once the site and the scope are knownNo fixed price is published.

Remediation services in County Mayo: questions people ask

Still have a question? Call 01 201 1260 or email info@verde.ie.

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 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 StatisticsCentral 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 ComplaintEnvironmental Protection Agency, 2025. Mayo County Council’s contact details and the order to report in.
  3. What our clients sayVerdé Environmental Group, checked 11 November 2026. The client review of core sampling at a house in Westport.
  4. Contact usInland 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 sitesHealth and Safety Authority, 2022. Why buildings from before 2000 need an asbestos check before work starts.
  6. OpenStreetMapOpenStreetMap contributors, checked 11 November 2026. Positions of Castlebar, Ballina, Westport and the other Mayo towns.
  7. Contact Verdé: Kilcoole, Castlebar and CorkVerdé Environmental Group, checked 11 November 2026. The Castlebar office address and phone number.

Read this page in Markdown

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 at any hour.

Send an enquiryCall 0818 714 002

Office 01 201 1260 or info@verde.ie

More counties Verdé covers

Related pages

From Kilcoole

From Cork

  • Cork
  • Limerick
  • Kerry
  • Tipperary
  • Clare

From Castlebar

  • Mayo
  • Galway
  • Roscommon
  • Sligo
  • Leitrim
  • Donegal