www.cdc.gov: Web standards & metadata — week 2026-W32
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%
0/1494
hreflang alternates declared
0%
0/1494
Open social presence (Mastodon/Bluesky) linked
0%
0/1494
Open Graph tags (5/6)
59%
886/1494
Twitter card metadata
60%
889/1494
Canonical URL declared
70%
1052/1494
Meta description present
70%
1041/1494
Character encoding declared
73%
1096/1494
Responsive viewport (zoom not disabled)
73%
1096/1494
Document language (lang) set
81%
1216/1494
Page has a <title>
100%
1493/1494
across 1494 page(s)
No Mastodon/Bluesky links detected on checked pages.
Progressive Web Resilience across 1494 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
✗ 0/1494 pages
A service worker is what makes offline access, caching, and background sync possible.
—
Manifest declares a maskable icon
✗ 0/1494 pages
A maskable icon lets the OS safely crop/mask the app icon on different device shapes without clipping content.