www.cdc.gov: Web standards & metadata — week 2026-W39
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%
0/1461
hreflang alternates declared
0%
1/1461
Open social presence (Mastodon/Bluesky) linked
0%
0/1461
Open Graph tags (0/6)
53%
775/1461
Twitter card metadata
58%
848/1461
Meta description present
63%
926/1461
Canonical URL declared
70%
1023/1461
Character encoding declared
72%
1054/1461
Responsive viewport (zoom not disabled)
72%
1055/1461
Document language (lang) set
79%
1149/1461
Page has a <title>
100%
1461/1461
across 1461 page(s)
No Mastodon/Bluesky links detected on checked pages.
Progressive Web Resilience across 1461 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
✗ 0/1461 pages
A service worker is what makes offline access, caching, and background sync possible.
—
Manifest declares a maskable icon
✗ 0/1461 pages
A maskable icon lets the OS safely crop/mask the app icon on different device shapes without clipping content.