www.cdc.gov: Web standards & metadata — week 2026-W40
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%
0/865
hreflang alternates declared
0%
0/865
Open social presence (Mastodon/Bluesky) linked
0%
0/865
Open Graph tags (0/6)
55%
475/865
Twitter card metadata
60%
523/865
Meta description present
66%
571/865
Canonical URL declared
73%
631/865
Character encoding declared
75%
653/865
Responsive viewport (zoom not disabled)
75%
652/865
Document language (lang) set
80%
696/865
Page has a <title>
100%
864/865
across 865 page(s)
No Mastodon/Bluesky links detected on checked pages.
Progressive Web Resilience across 865 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
✗ 0/865 pages
A service worker is what makes offline access, caching, and background sync possible.
—
Manifest declares a maskable icon
✗ 0/865 pages
A maskable icon lets the OS safely crop/mask the app icon on different device shapes without clipping content.