Skip to content
https://ohsu.edu

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
73
GRADE
C
FIX
2
REVIEW
2
PASS
2
INFO
0
Device:
Mobile Desktop
Checks
6
2 PASS 2 REVIEW 2 FIX
D
CO2 Per Page Load
Action
1.26g CO2 per view
FIX
1.26g CO2 per view
Warning::
1.26g CO2 per page view
This page transfers 5.3 MB, producing an estimated 1.26g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.26g, end-user device 0.97g.
Got: 1.26g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 150.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 150.8 kg of CO2 annually — equivalent to charging 18851 smartphones.
Info::
Green hosting reduces data center emissions

1.26g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 32% of websites

Sustainable Web Design model v4 · Page size: 5.3 MB

Your site
1.26g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.03g
Network
0.26g
End-user device
0.97g
At 10,000 monthly views: Monthly: 12.6 kg · Annual: 150.8 kg · ≈ 18851 smartphone charges
D
Carbon Budget
Action
68th percentile
FIX
68th percentile
Warning::
1.26g CO2 — above the median website (0.60g)
Heavier than an estimated 32% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 68th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.26g

68th percentile

Cleaner than 32% of websites

✗ Above the median website

vs Median 109% more
vs Target 151% more
B
Transfer Efficiency
82% efficient
REVIEW
82% efficient
Info::
Transfer efficiency: 82%
An estimated 969 KB (18%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 969 KB of unused JavaScript. This wasted data produces 0.22g of unnecessary CO2 per page view.
82% efficient

Total waste: 969 KB (18% of page weight)

Unused JS 969 KB

0.22g unnecessary CO2 per visit

Actual transfer 5437 KB
Theoretical minimum 4467 KB
Potential savings 969 KB (0.22g CO2)

See Deep Analysis sections above for specific optimizations.

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Green Hosting
Green (cdn)
PASS
Green (cdn)
Info::
Fastly CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
Info::
Fastly: 100% renewable energy for edge network
Info::
Green hosting status based on known provider commitments
Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org.
Green Hosting✓ Green Hosted
Hosting Acquia Cloud Platform✗CDN Fastly✓

Fastly: 100% renewable energy for edge network

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+
Repeat Visit Weight
100% cached
PASS
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 14 KB (vs 5437 KB first visit). 51 of 52 resources are served from browser cache, saving 1.25g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 1.26g)
First visit
5437 KB
Repeat visit
14 KB

100% reduction on repeat visits

Saving 1.25g CO2 per returning visitor

51 resources served from cache · 1 resources re-downloaded

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback