Severn Trent scores 50/100 (Making progress) on SINK's independent climate assessment — scored from public data only, no company payment can change a number. Last verified October 2026.
That places Severn Trent joint 142nd of 809 companies scored, and 1st of 11 in Water & Sewerage.
Severn Trent's 2025/26 Scope 1 emissions were 384,205 tCO2e under a company-revised method for process emissions; under the industry-standard method they would be 526,222 tCO2e, and its assurer flagged an elevated reporting risk on the change. Imported electricity is backed by renewable certificates, giving market-based Scope 2 of 292 tCO2e. Scope 3 was 697,345 tCO2e, up from 506,562 in 2019/20. The Environment Agency rated it 4 stars for 2024, the only company of nine, and it had two serious pollution incidents in 2025. In February 2024 it was fined £2,072,000 for a reckless discharge of raw sewage into the River Trent, and in July 2026 Ofwat found serious and unacceptable breaches of its wastewater duties but imposed no fine. SBTi validated its near-term target of a 46% cut in Scope 1 and 2 by 2031.
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Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleStrongest on Carbon Footprint — Operations and Transparency & Accountability (8/10, 8/10). Weakest on Controversies & Red Flags and Water Impact (4/10, 4/10).
10 sources used in this assessment. All publicly available. Each row shows which rubric questions it informed.
Re-scored 40 → 50 in October 2026 after moving from Energy Supply / Utilities to the new Water & Sewerage sector (base 40) under methodology v2.5.12.
“Jacobs, was engaged to perform independent limited assurance in accordance with the International Standard on Assurance Engagements on greenhouse gas statements”
“We want to bring our supply chain with us on the same journey.”
“only company (out of 9) rated as industry leading (4 stars)”
“Severn Trent is set to more than double its biodiversity targets by helping to transform 11,000ha of land”
“Severn Trent Water has been ordered to pay a fine of £2,072,000 for allowing huge amounts of raw sewage to discharge into the River Trent”
“Our investigation found serious and unacceptable breaches by Severn Trent Water”
“finding that Severn Trent had made 494 suspected illegal spills of sewage in 2021 and 309 in 2022”
If you believe a source has been misread or a newer version exists, submit a challenge.
Severn Trent is the highest-scoring water & sewerage company we've rated.
Among the 11 major water & sewerage brands we've scored, Severn Trent sits 1st of 11.
Severn Trent's score has moved from 40 to 50 across 2 recorded reviews — up 10 points.
Moved from Energy Supply / Utilities to the new Water & Sewerage sector (base 40) under methodology v2.5.12: 40 → 50.
Initial public score 40 (publish-draft)
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.
Severn Trent Plc owns Severn Trent Water, the regulated water and sewerage company for the Midlands and parts of Wales. It was incorporated in 1989 and its registered office is in Coventry. Its filed accounts for the year to 31 March 2026 report revenue of £2,831m and an average of 10,860 employees. It is regulated by Ofwat and the Environment Agency.
English water and sewerage peer; comparable regulatory environment and operational scale.
View breakdown →Regional English water company; same regulatory framework and sewerage operational profile.
View breakdown →Welsh water and sewerage operator; UK regulator oversight and wastewater management parallels.
View breakdown →Major English water and sewerage company; equivalent infrastructure and regulatory compliance exposure.
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