www.cdc.gov: Web standards & metadata — week 2026-W38
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%
0/876
hreflang alternates declared
0%
1/876
Open social presence (Mastodon/Bluesky) linked
0%
0/876
Open Graph tags (6/6)
59%
518/876
Twitter card metadata
59%
518/876
Meta description present
69%
601/876
Canonical URL declared
70%
613/876
Character encoding declared
72%
633/876
Responsive viewport (zoom not disabled)
72%
633/876
Document language (lang) set
80%
700/876
Page has a <title>
100%
876/876
across 876 page(s)
No Mastodon/Bluesky links detected on checked pages.
Progressive Web Resilience across 876 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
✗ 0/876 pages
A service worker is what makes offline access, caching, and background sync possible.
—
Manifest declares a maskable icon
✗ 0/876 pages
A maskable icon lets the OS safely crop/mask the app icon on different device shapes without clipping content.