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https://expertroofingwestchester.com

Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
57
GRADE
D
FIX
3
REVIEW
3
PASS
1
INFO
1
Device:
Mobile Desktop
Checks
8
1 PASS 3 REVIEW 3 FIX
F
CO2 Per Page Load
Action
2.58g CO2 per view
FIX
2.58g CO2 per view
Critical::
2.58g CO2 per page view
This page transfers 9.1 MB, producing an estimated 2.58g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.48g, network 0.45g, end-user device 1.65g.
Got: 2.58g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 309.1 kg CO2/year
With 10,000 page views per month, this page would generate approximately 309.1 kg of CO2 annually — equivalent to charging 38642 smartphones.

2.58g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 9.1 MB

Your site
2.58g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.48g
Network
0.45g
End-user device
1.65g
At 10,000 monthly views: Monthly: 25.8 kg · Annual: 309.1 kg · ≈ 38642 smartphone charges
D
Green Hosting
Action
Unknown
FIX
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

F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
2.58g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

2.58g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 329% more
vs Target 415% more
B
Transfer Efficiency
77% efficient
REVIEW
77% efficient
Info::
Transfer efficiency: 77%
An estimated 2107 KB (23%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 2107 KB of unused JavaScript. This wasted data produces 0.58g of unnecessary CO2 per page view.
77% efficient

Total waste: 2107 KB (23% of page weight)

Unused JS 2107 KB

0.58g unnecessary CO2 per visit

Actual transfer 9314 KB
Theoretical minimum 7207 KB
Potential savings 2107 KB (0.58g CO2)

See Deep Analysis sections above for specific optimizations.

C
Web Font Weight Variants
Action
37 font weights loaded across 3 famil(y/ies)
REVIEW
37 font weights loaded across 3 famil(y/ies)
Warning::
37 font weights loaded -- likely 100+ KB of unused payload
Loading 37 font weights typically transfers 200-400 KB just for fonts. Most pages legitimately use 2-3 weights (regular + bold, maybe medium). Audit which weights your stylesheet actually applies and trim the Google Fonts URL accordingly. Affected families: Montserrat, Open Sans, Roboto%3A400%2C500%2C600%2C700%7CInter%3A800%7CInter%3A800%7CInter%3A800%7CInter%3A800%7CInter%3A800%7CInter%3A700%2C400%2C500%2C600.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Repeat Visit Weight
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 128 KB (vs 9314 KB first visit). 226 of 230 resources are served from browser cache, saving 2.54g CO2 per repeat visit.
Info::
Repeat visit: 0.04g CO2 (first visit: 2.58g)
First visit
9314 KB
Repeat visit
128 KB

99% reduction on repeat visits

Saving 2.54g CO2 per returning visitor

226 resources served from cache · 4 resources re-downloaded

Image Optimization
72 images, 1951 KB total, 1163 KB wasted
INFO

Image Optimization Audit

Total Images

72

Total Size

1951 KB

Oversized

17

Wasted

1163 KB

10 missing dimensions 14 missing lazy loading
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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