https://pcpclaim-uk.co.uk
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
81
GRADE
B
FIX
1
REVIEW
3
PASS
3
INFO
1
Checks
83 PASS 3 REVIEW 1 FIX
DGreen HostingActionUnknownFIX
Green Hosting
ActionUnknown
Unknown
Info::
Hosting provider could not be identified
Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
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 HostingUnable to Determine
Hosting Not identified✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
BTransfer Efficiency76% efficientREVIEW
Transfer Efficiency
76% efficient
76% efficient
Info::
Transfer efficiency: 76%
An estimated 213 KB (24%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 213 KB of unused JavaScript. This wasted data produces 0.06g of unnecessary CO2 per page view.
Total waste: 213 KB (24% of page weight)
Unused JS 213 KB
0.06g unnecessary CO2 per visit
Actual transfer 887 KB
Theoretical minimum 674 KB
Potential savings 213 KB (0.06g 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
ACO2 Per Page Load0.25g CO2 per viewPASS
CO2 Per Page Load
0.25g CO2 per view
0.25g CO2 per view
Info::
0.25g CO2 per page view
This page transfers 0.9 MB, producing an estimated 0.25g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.05g, network 0.04g, end-user device 0.16g.
Got: 0.25g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 29.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 29.4 kg of CO2 annually — equivalent to charging 3680 smartphones.
0.25g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 86% of websites
Sustainable Web Design model v4 · Page size: 0.9 MB
Your site
0.25g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.05g
Network
0.04g
End-user device
0.16g
At 10,000 monthly views: Monthly: 2.5 kg · Annual: 29.4 kg · ≈ 3680 smartphone charges
A+Repeat Visit Weight93% cachedPASS
Repeat Visit Weight
93% cached
93% cached
Info::
93% reduction on repeat visits
Returning visitors download only 62 KB (vs 887 KB first visit). 68 of 70 resources are served from browser cache, saving 0.23g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.25g)
First visit
887 KB
Repeat visit
62 KB
93% reduction on repeat visits
Saving 0.23g CO2 per returning visitor
68 resources served from cache · 2 resources re-downloaded
ACarbon Budget14th percentilePASS
Carbon Budget
14th percentile
14th percentile
Info::
0.25g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 86% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 14th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.25g
14th percentile
Cleaner than 86% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 59% cleaner ✓
vs Target 51% cleaner ✓
Image Optimization26 images, 1 KB total, 0 KB wastedINFO
Image Optimization
26 images, 1 KB total, 0 KB wasted
Image Optimization Audit
Total Images
26
Total Size
1 KB
5 missing alt text
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.