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https://michigan.gov

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
60
GRADE
D
FIX
3
REVIEW
2
PASS
1
INFO
0
Device:
Mobile Desktop
Checks
6
1 PASS 2 REVIEW 3 FIX
F
CO2 Per Page Load
Action
1.63g CO2 per view
FIX
1.63g CO2 per view
Warning::
1.63g CO2 per page view
This page transfers 5.8 MB, producing an estimated 1.63g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.30g, network 0.28g, end-user device 1.05g.
Got: 1.63g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 196.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 196.0 kg of CO2 annually — equivalent to charging 24499 smartphones.

1.63g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 21% of websites

Sustainable Web Design model v4 · Page size: 5.8 MB

Your site
1.63g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.30g
Network
0.28g
End-user device
1.05g
At 10,000 monthly views: Monthly: 16.3 kg · Annual: 196.0 kg · ≈ 24499 smartphone charges
D
Green Hosting
Action
Not green
FIX
Not green
Info::
No confirmed renewable energy commitment detected
Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
Info::
Akamai: Committed to 50% renewable by 2030
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 HostingNot Green Hosted
Hosting Not identified✗CDN Akamai✗

Akamai: Committed to 50% renewable by 2030

Based on known provider commitments. Verify at thegreenwebfoundation.org

F
Carbon Budget
Action
79th percentile
FIX
79th percentile
Warning::
1.63g CO2 — above the median website (0.60g)
Heavier than an estimated 21% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 79th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.63g

79th percentile

Cleaner than 21% of websites

✗ Above the median website

vs Median 172% more
vs Target 227% more
B
Transfer Efficiency
89% efficient
REVIEW
89% efficient
Info::
Transfer efficiency: 89%
An estimated 642 KB (11%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 642 KB of unused JavaScript. This wasted data produces 0.18g of unnecessary CO2 per page view.
89% efficient

Total waste: 642 KB (11% of page weight)

Unused JS 642 KB

0.18g unnecessary CO2 per visit

Actual transfer 5905 KB
Theoretical minimum 5263 KB
Potential savings 642 KB (0.18g 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+
Repeat Visit Weight
97% cached
PASS
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 181 KB (vs 5905 KB first visit). 166 of 170 resources are served from browser cache, saving 1.58g CO2 per repeat visit.
Info::
Repeat visit: 0.05g CO2 (first visit: 1.63g)
First visit
5905 KB
Repeat visit
181 KB

97% reduction on repeat visits

Saving 1.58g CO2 per returning visitor

166 resources served from cache · 4 resources re-downloaded

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

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