Awarded 17 September 2026
ES RDE 084 - Water Quality and Trees -Phase 3
Environment Agency · London
Diffuse pollution tenders and contracts
UK public sector, covering 600+ buyer sites
85 contracts awarded in the 24 months to 12 October 2026
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Updated 12 October 2026 · compiled by BidSkim Limited · How we count
Diffuse pollution contracts ,
85 contracts across the UK, of any size
Recently awarded
The latest diffuse pollution contracts awarded
Awarded 16 September 2026
Riparian Buffer Opportunity Assessment and Delivery Review
Wrexham County Borough Council · Wales
Awarded 14 September 2026
ES RDE 121 - Broads Special Area of Conservation (SAC)
Environment Agency · London
Awarded 8 September 2026
Local Resource Option Screening Study in the Holbeach Marsh area
Environment Agency · East Midlands
Awarded 4 September 2026
ES RDE 088 - Bathing Water Hype model
Environment Agency · London
Who wins · 24 months to October 2026
JBA Consulting won the most diffuse pollution contracts
AECOM won the most by value. Each dot is one contract, coloured by who bought it.
CouncilsOther public bodies
| Rank | Contractor | Contracts won, by buyer | Contracts | Value won | Buyers | Share |
|---|---|---|---|---|---|---|
| 1 | JBA Consulting London · See every contract | 13 | £885k | 3 | ||
| 2 | RSK East Midlands · See every contract | 9 | £497k | 3 | ||
| 3joint | AECOM Yorkshire and the Humber · See every contract | 6 | £8.8m | 3 | ||
| 3joint | WSP North East · See every contract | 6 | £510k | 1 | ||
| 3joint | UK Centre for Ecology & Hydrology (UKCEH) London · See every contract | 6 | £455k | 2 | ||
| 6 | Promar International Ltd South West · See every contract | 5 | £366k | 1 | ||
| 7 | Ricardo Energy & Environment East Midlands · See every contract | 4 | £128k | 3 | ||
| 8 | Yorkshire Wildlife Trust London · See every contract | 3 | £225k | 2 | ||
| 9joint | Arcadis West Midlands · See every contract | 2 | £866k | 2 | ||
| 9joint | Norfolk Rivers Trust East of England · SME · See every contract | 2 | £299k | 2 |
25 more diffuse pollution contractors ranked. See the full ranking →
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Who buys
20 buyers awarded diffuse pollution contracts
Contracts with a published value in the last 24 months, from the type of buyer to the size of the contract.
6 buyers bought diffuse pollution more than once in the last 24 months
Each dot is a buyer, by how many diffuse pollution contracts it awarded in the last 24 months.
See who they are and when they usually buy →
Few and big, or many and small
Each dot is a buyer: how many diffuse pollution contracts it awarded against what they were worth. The busiest and biggest are named.
CouncilsOther public bodies
Top buyers by contracts awarded
| Rank | Buyer | Contracts | Value |
|---|---|---|---|
| 1 | Environment Agency | 37 | £3.1m |
| 2 | Natural England | 21 | £1.3m |
| 3 | Department for Environment, Food and Rural Affairs | 5 | £315k |
| 4 | Waste and Resources Action Programme (WRAP) | 4 | £511k |
| 5 | The Coal Authority | 2 | £8.6m |
| 6 | Food Standards Agency | 2 | £75k |
| 7 | Severn Trent Water Limited | 1 | £800k |
| 8 | NI Water and its subsidiaries | 1 | £420k |
| 9 | Armagh City, Banbridge and Craigavon Borough Council | 1 | £298k |
| 10 | Herefordshire Council | 1 | £139k |
Prices
Half of diffuse pollution contracts are worth less than £77k
Every contract with a published value, on a log scale, coloured by who bought it.
CouncilsOther public bodies
The 10 biggest contracts hold 69% of the money
Coloured by who bought it.
- The Coal AuthorityAECOM · 3 Mar 2026
- Severn Trent Water LimitedArcadis · 13 Mar 2026
- NI Water and its subsidiariesJig Saw Farm Community Interest Company · 15 Jun 2026
- Environment AgencyAtkinsRéalis · 6 Jun 2025
- Armagh City, Banbridge and Craigavon Borough CouncilCivco Ltd · 3 Aug 2026
- The Coal AuthorityRSK Environment · 16 Dec 2024
- Environment AgencyYorkshire Wildlife Trust · 19 Jun 2026
- Environment AgencyWSP · 7 Jul 2025
- Waste and Resources Action Programme (WRAP)Norfolk Rivers Trust · 5 Jun 2026
- Environment AgencyMott MacDonald · 16 Feb 2026
Where and when
London awards the most diffuse pollution contracts. November and August are the busiest months.
Contracts by region and by month awarded. Click a region to filter the page.
FewerMore contracts
See the regions as a table
| Region | Contracts | Value |
|---|---|---|
| London | 13 | £1m |
| East Midlands | 8 | £652k |
| South West | 7 | £360k |
| West Midlands | 5 | £1.1m |
| South East | 5 | £691k |
| North East | 3 | £340k |
| Yorkshire and the Humber | 3 | £192k |
| East of England | 3 | £307k |
| Northern Ireland | 3 | £793k |
| Wales | 2 | £109k |
| North West | 1 | £41k |
| Scotland | 0 | Not published |
Often bought with diffuse pollution
Related services
Deadlines
Half of diffuse pollution tenders close within 26 days of being published
Each dot is a diffuse pollution tender published across the UK in the last 24 months, by how many days it was open. 71% closed within a month. Spot one a week late and 27% of the time to respond has gone.
Hear about new diffuse pollution tenders the moment they're published →
Key findings
- 26 days
is how long the typical diffuse pollution tender is open, from publication to deadline.
Median of 21 UK diffuse pollution tenders published in the last 24 months. - 69%
of the money is in the 10 biggest diffuse pollution contracts.
Of 82 contracts with a published value. - 33%
of diffuse pollution contracts are won by SMEs.
As recorded by the buyer, on 52 award notices. - 32%
of diffuse pollution contracts are awarded in November and August.
27 of 85 contracts.
Questions
How many diffuse pollution contracts does the UK public sector award?
85 in the 24 months to 12 October 2026, from 20 public buyers.
How long are diffuse pollution tenders open for?
The median diffuse pollution tender is open for 26 days from publication to deadline.
How much is a typical public sector diffuse pollution contract worth?
The median is £77k, and 94% are worth less than £250k.
Who wins the most public sector diffuse pollution contracts?
JBA Consulting won the most (13). AECOM won the most by value (£8.8m).
What is included
Catchment programmes and assessments to protect water quality and resources: farm advice and diffuse pollution measures, groundwater modelling, pollution risk assessments and water quality evidence reviews.
- Catchment sensitive farming advice
- Riparian fencing for diffuse pollution
- Groundwater modelling for abstraction decisions
- Runoff and drinking water source pollution risk assessment
- Nitrate and water reuse evidence reviews
What is not included
- Nutrient neutrality strategies, nutrient mitigation schemes and constructed wetlands for nutrient mitigation (see Nutrient neutrality assessment and mitigation)
- Private water supply sampling and risk assessment (see Private water supply sampling and risk assessment)
- Field water quality monitoring (see Water quality and hydrometric monitoring)
- River restoration (see River restoration and natural flood management)
- HRA of plans (see Habitats Regulations Assessment)
- Flood risk and drainage engineering (see Flood risk assessment)
- Habitat creation works (see Habitat creation and enhancement works)
- Stock fencing outside a catchment programme (see Deer, stock and rural fencing)