University of Portsmouth sustainability score: 51/100

·Higher Education / Universities·Last verified 27 September 2026
51
out of 100
Making progressPending ReviewMixed evidence· 9 src

University of Portsmouth scores 51/100 (Making progress) on SINK's independent climate assessment — scored from public data only, no company payment can change a number. Last verified September 2026.

That places University of Portsmouth joint 117th of 780 companies scored, and joint 32nd of 66 in Higher Education / Universities.

Portsmouth has cut operational emissions 61% since 2005 and completed fossil fuel divestment, but Scope 3 emissions remain unmeasured and crude. Supply chain emissions are unquantified and unverified. Net-zero 2030 relies partly on unproven carbon sequestration, and no third-party validation of targets exists.

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This score is built from public data only. If your practice is stronger than your disclosure, submit evidence for review — or challenge any question, free.

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The calculation

How is University of Portsmouth's SINK score calculated?

Same ten questions for every company. No private weighting.

SINK = (0.3 × Base + 0.7 × Performance) × Scale
Industry base impact
Higher Education / Universities sector ceiling.
45 / 100
Performance score
Sum of the 10 rubric questions, scored 0–10 each.
54 / 100
Raw score
Weighted average before scale penalty.
(0.3 × 45) + (0.7 × 54) = 51.3
Scale penalty
Multiplier based on absolute emissions volume — physics-first.
× 1
Final score
Rounded. Making progress.
51 / 100
The ten questions

What is University of Portsmouth doing well, and where does it fall short?

Strongest on Controversies & Red Flags and Carbon Footprint — Operations (8/10, 7/10). Weakest on Nature & Biodiversity Impact and Carbon Footprint — Supply Chain (3/10, 3/10).

Where the evidence comes from

What evidence is University of Portsmouth's score based on?

9 sources used in this assessment. All publicly available. Each row shows which rubric questions it informed.

[1]Public record
HESA Estates Management Record — Data & Analysis

“Total scope 1 and 2 carbon emissions 6,054.9 tCO2e, University of Portsmouth, 2023/24”

Ongoing
Q1Q2Q3Q4Q6Q7Q9
View →
[2]Self-reported
Climate-Positive Sustainability Policy (October 2023)

“Scope 1 and 2 emissions have been accurately monitored since 2009 (using invoice data)”

2023
Q1Q2Q3Q5Q6Q8Q9
View →
[3]Public record
HESA News: 71% of UK HE providers reduced CO2 emissions in 2023/24

“Of the 136 HE providers who submitted data for the past two years, 96 (71%) saw a decrease in emissions”

2025
Q3
View →
[4]Public record
University of Portsmouth wins £3m government grant to reduce carbon footprint

“replacing the current fossil-fuelled heating plants with all electric air source heat pumps powered by renewable electricity”

2023
Q4
View →
[5]Third-party verified
Ellen MacArthur Foundation — New Plastics Economy Global Commitment

“University of Portsmouth was one of the first to sign up to the Ellen MacArthur Foundation's (EMF) New Plastics Economy Global Commitment”

Ongoing
Q5Q6
View →
[6]Public record
University of Portsmouth divests from all fossil fuels

“Portsmouth becomes the 101st university to commit to divestment off the back of the long running Fossil Free campaign”

2023
Q8Q10
View →
[7]Self-reported
How wasteful is Portsmouth when it comes to water?

“The whole of the South East of England has been classified as an area of serious water stress”

Unknown
Q7
View →
[8]Self-reported
Award-winning sustainable sports centre scoops another prize

“award-winning sustainable sports centre”

Unknown
Q6
View →
[9]Self-reported
University of Portsmouth — Concordat for Environmental Sustainability

“Concordat for the Environmental Sustainability of Research and Innovation Practice”

Ongoing
Q9
View →

If you believe a source has been misread or a newer version exists, submit a challenge.

University of Portsmouth in context

How does University of Portsmouth compare with other higher education / universities companies?

Where University of Portsmouth sits among higher education / universities peers.

Among the 66 major higher education / universities brands we've scored, University of Portsmouth is tied =32nd of 66, with 6 others.

=32/66
University of Portsmouth's rank
50
Industry average
22
Industry low
60
Industry high
How this score has moved

Has University of Portsmouth's score changed?

today

As University of Portsmouth's score updates, the trajectory will appear here.

What's being contested

Has University of Portsmouth's score been challenged?

This score is not currently being contested.

Every challenge is published. We'd rather be corrected than wrong — that's the whole point.

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.

About University of Portsmouth

University of Portsmouth is a public research institution in southern England. It operates a city-centre campus in Portsmouth with research strengths in engineering, technology, and marine sciences. As a member of the Million+ group, it sits in the mid-tier of UK higher education.

Founded
—
Headquarters
GB
Employees
—
Annual revenue
£303M (HESA EMR 2023/24)
Company website ↗
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