www.cdc.gov: Web standards & metadata — week 2026-W35
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%
0/855
hreflang alternates declared
0%
0/855
Open social presence (Mastodon/Bluesky) linked
0%
0/855
Open Graph tags (6/6)
56%
481/855
Twitter card metadata
56%
482/855
Meta description present
68%
579/855
Canonical URL declared
69%
589/855
Character encoding declared
71%
611/855
Responsive viewport (zoom not disabled)
71%
611/855
Document language (lang) set
78%
670/855
Page has a <title>
100%
855/855
across 855 page(s)
No Mastodon/Bluesky links detected on checked pages.
Progressive Web Resilience across 855 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
✗ 0/855 pages
A service worker is what makes offline access, caching, and background sync possible.
—
Manifest declares a maskable icon
✗ 0/855 pages
A maskable icon lets the OS safely crop/mask the app icon on different device shapes without clipping content.