https://va.gov
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
71
GRADE
C
FIX
2
REVIEW
4
PASS
1
INFO
1
Checks
81 PASS 4 REVIEW 2 FIX
DGreen HostingActionNot greenFIX
Green Hosting
ActionNot green
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::
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 Amazon Web Services✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
DCarbon BudgetAction52th percentileFIX
Carbon Budget
Action52th percentile
52th percentile
Warning::
0.67g CO2 — above the median website (0.60g)
Heavier than an estimated 48% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 52th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.67g
52nd percentile
Cleaner than 48% of websites
✗ Above the median website
vs Median 12% more
vs Target 34% more
BCO2 Per Page Load0.67g CO2 per viewREVIEW
CO2 Per Page Load
0.67g CO2 per view
0.67g CO2 per view
Info::
0.67g CO2 per page view
This page transfers 2.4 MB, producing an estimated 0.67g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.12g, network 0.12g, end-user device 0.43g.
Got: 0.67g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 80.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 80.6 kg of CO2 annually — equivalent to charging 10075 smartphones.
0.67g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 48% of websites
Sustainable Web Design model v4 · Page size: 2.4 MB
Your site
0.67g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.12g
Network
0.12g
End-user device
0.43g
At 10,000 monthly views: Monthly: 6.7 kg · Annual: 80.6 kg · ≈ 10075 smartphone charges
CTransfer EfficiencyAction65% efficientREVIEW
Transfer Efficiency
Action65% efficient
65% efficient
Warning::
Transfer efficiency: 65%
An estimated 844 KB (35%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 844 KB of unused JavaScript. This wasted data produces 0.23g of unnecessary CO2 per page view.
Total waste: 844 KB (35% of page weight)
Unused JS 844 KB
0.23g unnecessary CO2 per visit
Actual transfer 2428 KB
Theoretical minimum 1583 KB
Potential savings 844 KB (0.23g CO2)
See Deep Analysis sections above for specific optimizations.
BWeb Font Weight VariantsNo detectable Google Fonts weightsREVIEW
Web Font Weight Variants
No detectable Google Fonts weights
No detectable Google Fonts weights
Info::
No detectable Google Fonts weights
The analyzer detects font weights via Google Fonts URL parameters (~70% of font-using sites). Self-hosted fonts and non-Google CDN fonts aren't visible to URL-based detection. If you self-host fonts, manually audit how many @font-face weights you ship -- 2-3 weights per family is typically enough; 5+ is usually unused payload.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 13 KB (vs 2428 KB first visit). 55 of 56 resources are served from browser cache, saving 0.67g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.67g)
First visit
2428 KB
Repeat visit
13 KB
99% reduction on repeat visits
Saving 0.67g CO2 per returning visitor
55 resources served from cache · 1 resources re-downloaded
Image Optimization8 images, 14 KB total, 13 KB wastedINFO
Image Optimization
8 images, 14 KB total, 13 KB wasted
Image Optimization Audit
Total Images
8
Total Size
14 KB
Oversized
4
Wasted
13 KB
2 missing alt text 6 missing dimensions 4 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.