www.cdc.gov: Web standards & metadata — week 2026-W27
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% | 0/756 |
|---|
| hreflang alternates declared | 0% | 0/756 |
|---|
| Open social presence (Mastodon/Bluesky) linked | 0% | 0/756 |
|---|
| Service worker registered | 0% | 0/756 |
|---|
| Open Graph tags (6/6) | 59% | 447/756 |
|---|
| Twitter card metadata | 59% | 444/756 |
|---|
| Meta description present | 72% | 541/756 |
|---|
| Canonical URL declared | 73% | 553/756 |
|---|
| Character encoding declared | 73% | 553/756 |
|---|
| Responsive viewport (zoom not disabled) | 73% | 554/756 |
|---|
| Web app manifest declared | 73% | 553/756 |
|---|
| Theme color declared | 73% | 553/756 |
|---|
| Apple touch icon (iOS/bookmark icon) | 73% | 553/756 |
|---|
| Document language (lang) set | 78% | 592/756 |
|---|
| Page has a <title> | 100% | 755/756 |
|---|
| HTTPS (required for service workers) | 100% | 756/756 |
|---|
across 756 page(s)
No Mastodon/Bluesky links detected on checked pages.