www.cdc.gov: Web standards & metadata — week 2026-W34
Web standards & metadata
Web-standards, metadata, and security checks in the spirit of ScanGov (methodology CC0), run across our scan rather than only the homepage.
Share of checked pages passing each standard (lowest first).
Standard
Pass rate
Pages
schema.org GovernmentOrganization markup
0%
0/1493
hreflang alternates declared
0%
0/1493
Open social presence (Mastodon/Bluesky) linked
0%
0/1493
Open Graph tags (0/6)
57%
850/1493
Twitter card metadata
57%
850/1493
Meta description present
67%
997/1493
Canonical URL declared
68%
1011/1493
Character encoding declared
70%
1045/1493
Responsive viewport (zoom not disabled)
70%
1045/1493
Document language (lang) set
78%
1158/1493
Page has a <title>
100%
1492/1493
across 1493 page(s)
No Mastodon/Bluesky links detected on checked pages.
Progressive Web Resilience across 1493 page(s)
Capabilities that keep the site useful under real-world conditions — unreliable connectivity, interrupted sessions, mobile install. Not a compliance score: each row is independent evidence.
Progressive Web Resilience signals (lowest pass rate first).
Capability
Result
Why it matters
Evidence
Service worker registered
✗ 0/1493 pages
A service worker is what makes offline access, caching, and background sync possible.
—
Manifest declares a maskable icon
✗ 0/1493 pages
A maskable icon lets the OS safely crop/mask the app icon on different device shapes without clipping content.