---
title: "Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation"
ocid: "ocds-h6vhtk-02e38c"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-02e38c"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-02e38c.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-02e38c.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "CARMARTHENSHIRE COUNTY COUNCIL"
published: "2025-12-17"
---

# Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation

Buyer: CARMARTHENSHIRE COUNTY COUNCIL  
Current stage: Award  
OCID: ocds-h6vhtk-02e38c

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## Summary

The procurement process involves Carmarthenshire County Council seeking services for the operation and maintenance of the Leachate Effluent Treatment Plant at the Nant-y-Caws Landfill Site, located in Carmarthen, South Wales (UKL14). This project is classified under environmental services, specifically pollution tracking, monitoring, and rehabilitation (CPV: 90730000). The procurement stage is in contract update, with previous awards recorded, highlighting the ongoing project and adaptations due to environmental compliance needs. The contract was originally set to expire on 31 January 2026 but has been extended until October 2026 to complete necessary installations. The involved parties include the buyer, Carmarthenshire County Council, and supplier, ExCAL Limited, which is an SME supplying these services.

This tender creates significant opportunities for businesses specialising in environmental and water-treatment services. Companies with expertise in sewage, refuse, cleaning, and environmental protection, particularly those with the capability to implement biological treatment solutions, would be well-suited for this contract. SMEs, especially those familiar with compliance and innovation in environmental management and water purification, can benefit from the extensive period of service provision required. The tender reflects a continuous need for technologically adept firms capable of contributing to regional environmental sustainability efforts. Participating businesses can leverage the opportunity for prolonged engagement due to regulatory-driven contract extensions, offering growth through technical contributions and environmental advancements.

## Notice

** THIS IS A CONTRACT AWARD NOTICE, NOT A CONTRACT OPPORTUNITY ** Carmarthenshire County Council is responsible for the safe treatment and disposal of leachate arising from a closed landfill site at Nant-y-Caws, Carmarthen, UK. The leachate is currently treated via a biological treatment plant prior to discharge to a local river under a Natural Resources Wales issued Permit. The treatment plant consists of a MBBR (Mobile Bed Biological Reactor) and SAF (Submerged Aerated Filter) that successively treats the leachate to enable consented discharge to the river. The Council invited tenders for the operation and maintenance of the plant with suitably qualified and technically competent personnel. The site location and address is: Nant-y-Caws Landfill Site Phase 1 Nant-y-Caws Carmarthen SA32 8BG Contract Period: 01/02/2022 to 31/01/2025 with an extension option of up to a further 12 months.

### Lot Information

Lot 1

The duration of the current Contract, which was due to expire on 31/01/2026, has been extended by 10 months to enable the full installation of a new denitrification reed bed to reduce nitrate levels and completion of a reed bed permit variation application to Natural Resources Wales.

Renewal: Option to extend for an additional 12 months.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/083620-2025 |
| Notice type | Tender Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Open |
| Procurement method details | Open procedure |
| Tender suitability | Not specified |
| Awardee scale | SME |
| All stages | Tender, Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 17 Dec 2025 |
| Submission deadline | 22 Oct 2021 |
| Future notice date | Not specified |
| Award date | 31 Jan 2022 |
| Contract period | Not specified |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | £535,949 |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Cancelled |
| Awards status | Active |
| Contracts status | Active |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | CARMARTHENSHIRE COUNTY COUNCIL |
| Locality | CARMARTHEN |
| Post town | Swansea |
| Postcode | SA31 1JP |
| Country | Wales |
| ITL 1 | TLL Wales |
| ITL 2 | TLL4 Mid and South West Wales |
| ITL 3 | TLL42 South West Wales |
| Local authority | Carmarthenshire |
| Electoral ward | Carmarthen Town North and South |
| Westminster constituency | Caerfyrddin |
| Delivery location | TLL14 South West Wales |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | EXCAL |

## CPV Codes

### Divisions

- 45 - Construction work
- 65 - Public utilities
- 90 - Sewage, refuse, cleaning and environmental services

### Codes

- 45232430 - Water-treatment work
- 65120000 - Operation of a water-purification plant
- 90000000 - Sewage, refuse, cleaning and environmental services
- 90500000 - Refuse and waste related services
- 90700000 - Environmental services
- 90710000 - Environmental management
- 90720000 - Environmental protection
- 90730000 - Pollution tracking and monitoring and rehabilitation
- 90732000 - Services related to soil pollution
- 90733000 - Services related to water pollution
- 90740000 - Pollutants tracking and monitoring and rehabilitation services

## Release History

- 17 Dec 2025 at 09:26 - AwardUpdate - Award Notice - https://www.find-tender.service.gov.uk/Notice/083620-2025
- 25 Feb 2022 at 16:00 - Award - Award Notice - https://www.find-tender.service.gov.uk/Notice/005321-2022
- 22 Sep 2021 at 13:35 - Tender - Tender Notice - https://www.find-tender.service.gov.uk/Notice/023577-2021

## Notice URLs

- https://etenderwales.bravosolution.co.uk
- https://www.carmarthenshire.gov.wales
- https://www.sell2wales.gov.wales/search/Search_AuthProfile.aspx?ID=AA0281

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-02e38c. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-02e38c.json.