www.cdc.gov: Web standards & metadata — week 2026-W36
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%
0/1479
hreflang alternates declared
0%
0/1479
Open social presence (Mastodon/Bluesky) linked
0%
0/1479
Open Graph tags (0/6)
59%
872/1479
Twitter card metadata
59%
870/1479
Meta description present
70%
1035/1479
Canonical URL declared
72%
1058/1479
Responsive viewport (zoom not disabled)
73%
1087/1479
Character encoding declared
74%
1088/1479
Document language (lang) set
80%
1181/1479
Page has a <title>
100%
1478/1479
across 1479 page(s)
No Mastodon/Bluesky links detected on checked pages.
Progressive Web Resilience across 1479 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
✗ 0/1479 pages
A service worker is what makes offline access, caching, and background sync possible.
—
Manifest declares a maskable icon
✗ 0/1479 pages
A maskable icon lets the OS safely crop/mask the app icon on different device shapes without clipping content.