Yorkshire Water scores 39/100 (Below expectations) on SINK's independent climate assessment — scored from public data only, no company payment can change a number. Last verified October 2026.
That places Yorkshire Water joint 371st of 799 companies scored, and 8th of 11 in Water & Sewerage.
Yorkshire Water's market-based emissions rose from 281 to 295 ktCO2e between FY2024 and FY2025, and Scope 1 rose from 85 to 88 kt. Sewerage pollution incidents rose from 117 in 2022 to 151 in 2024, 13 of them serious, and the Environment Agency rated it 2 stars. In March 2025 Ofwat found breaches of wastewater rules and accepted a £40m undertakings package. Its 2030 Scope 1 and 2 carbon-neutral goal relies on offsets for residual emissions, and its reported Scope 3 covers three categories.
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SINK = (0.3 × Base + 0.7 × Performance) × ScaleStrongest on Carbon Footprint — Operations and Transparency & Accountability (7/10, 7/10). Weakest on Water Impact and Emissions Trajectory (2/10, 2/10).
12 sources used in this assessment. All publicly available. Each row shows which rubric questions it informed.
8 of 12 sources are third-party verified or public record.
“Emissions are all UK onshore and have been independently verified (this year by BSI) against the ISO 14064-1 greenhouse gas emission verification standard”
“99.67% satisfactory sludge disposal and use”
“Heating water in homes and businesses makes up 81% of our scope 3 footprint.”
“Our investigation has found serious failures in how Yorkshire Water has operated and maintained its sewage works and networks”
If you believe a source has been misread or a newer version exists, submit a challenge.
Where Yorkshire Water sits among water & sewerage peers.
Among the 11 major water & sewerage brands we've scored, Yorkshire Water sits 8th of 11.
As Yorkshire Water's score updates, the trajectory will appear here.
This score is not currently being contested.
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No challenges submitted yet. If you have evidence that contradicts this score, you can challenge any question above — cite a public source and we'll review it.
Yorkshire Water Services Limited is the regulated water and sewerage company for Yorkshire, England, and part of the Kelda Group. It was incorporated on privatisation in 1989 and is headquartered in Leeds. Its filed accounts for the year to 31 March 2026 report revenue of £1,639.8m and an average of 4,481 employees. It is regulated by Ofwat and the Environment Agency.
Direct competitor; regional water and sewerage utility in England with parallel regulatory exposure.
View breakdown →Peer water utility; North-West England; subject to same EPA and Ofwat oversight frameworks.
View breakdown →Largest English water utility; comparable sewage pollution incidents and permit compliance pressures.
View breakdown →Regional English water supplier; equivalent operational scale and regulatory reporting requirements.
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