https://dc.gov
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
94
GRADE
A
FIX
0
REVIEW
2
PASS
4
INFO
0
Checks
64 PASS 2 REVIEW
BCO2 Per Page Load0.55g CO2 per viewREVIEW
CO2 Per Page Load
0.55g CO2 per view
0.55g CO2 per view
Info::
0.55g CO2 per page view
This page transfers 2.3 MB, producing an estimated 0.55g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.11g, end-user device 0.43g.
Got: 0.55g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 66.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 66.4 kg of CO2 annually — equivalent to charging 8306 smartphones.
Info::
Green hosting reduces data center emissions
0.55g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 55% of websites
Sustainable Web Design model v4 · Page size: 2.3 MB
Your site
0.55g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.11g
End-user device
0.43g
At 10,000 monthly views: Monthly: 5.5 kg · Annual: 66.4 kg · ≈ 8306 smartphone charges
BCarbon Budget45th percentileREVIEW
Carbon Budget
45th percentile
45th percentile
Info::
0.55g CO2 — below the median website (0.60g)
Better than an estimated 55% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.
Info::
Estimated 45th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.55g
45th percentile
Cleaner than 55% of websites
✗ Above the median website
vs Median 8% cleaner ✓
vs Target 11% more
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Acquia Cloud Platform, CDN: Cloudflare
Info::
Acquia Cloud Platform: Verified by the Green Web Foundation
Info::
Cloudflare: 100% renewable energy for global network since 2019
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 Cloudflare✓
Acquia Cloud Platform: Verified by the Green Web Foundation
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight94% cachedPASS
Repeat Visit Weight
94% cached
94% cached
Info::
94% reduction on repeat visits
Returning visitors download only 147 KB (vs 2395 KB first visit). 147 of 151 resources are served from browser cache, saving 0.52g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 0.55g)
First visit
2395 KB
Repeat visit
147 KB
94% reduction on repeat visits
Saving 0.52g CO2 per returning visitor
147 resources served from cache · 4 resources re-downloaded
A+Transfer Efficiency94% efficientPASS
Transfer Efficiency
94% efficient
94% efficient
Info::
Transfer efficiency: 94%
Only 153 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 153 KB (6% of page weight)
Unused JS 153 KB
0.04g unnecessary CO2 per visit
Actual transfer 2395 KB
Theoretical minimum 2242 KB
Potential savings 153 KB (0.04g CO2)
See Deep Analysis sections above for specific optimizations.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.