vital-scans open quality ledger

nih.gov: week 2026-W30

This is the 2026-W30 ISO-week report (3333 pages fetched, 3136 unique pages audited by axe/Alfa). Generated 2026-07-24. Compared against 2026-W29 (3333 fetched). The dashboard headline uses a rolling last-7-days window; this page is the full ISO week. Machine-readable API: snapshot.json · findings.json.

Primary standards queue: 0 required finding type(s) (handling: report). Verification queue: 17 required finding type(s) (handling: review). Aspirational queue: 0 finding type(s). Advisory queue: 0 finding type(s). Unmapped review queue: 8 finding type(s).

New this week
0
Fixed this week
0
Regressed this week
0

Fix these first

Highest-leverage issues, ranked by pages affected × severity × people reached. Fixing a shared component often clears many pages at once. Issue links go to the full bug detail on the Accessibility page.

Top 8 issues to prioritize this week.
IssueSeverityPagesWho it affectsHow to fixEvidence
Links must be distinguishable without relying on color (WCAG 1.4.1) (rule↗) Critical 3133 Without color perception, Limited vision See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/link-in-text-block?application=axeAPI pages (CSV)
All page content should be contained by landmarks (WCAG criterion undetermined) (rule↗) Serious 3133 — Wrap all page content in landmarks (header, nav, main, footer) so users can navigate by region. pages (CSV)
Heading levels should only increase by one (WCAG criterion undetermined) (rule↗) Serious 2314 — Use heading levels in order (h1 → h2 → h3) without skipping; structure, not size. pages (CSV)
Target size is at least 44×44 CSS pixels (Enhanced) (WCAG 2.5.5) (rule↗) Moderate 1568 — See remediation guidance: https://alfa.siteimprove.com/rules/sia-r111 pages (CSV)
aria attribute is permitted for element role (WCAG criterion undetermined) (rule↗) Moderate 1568 — Only use ARIA states/properties that are allowed on this element/role. pages (CSV)
Scrolling content can be accessed by keyboard (WCAG criterion undetermined) (rule↗) Moderate 1568 — See remediation guidance: https://alfa.siteimprove.com/rules/sia-r57 pages (CSV)
Text has enhanced contrast (WCAG 1.4.6) (rule↗) Moderate 1566 — Increase text contrast to meet WCAG AAA (7:1). pages (CSV)
Text has minimum contrast ratio of 4.5:1 (WCAG 1.4.8) (rule↗) Moderate 1566 — See remediation guidance: https://alfa.siteimprove.com/rules/sia-r73 pages (CSV)

Progress

Open findings by severity over 6 weeks (lower is better)
Critical Serious Moderate Minor W25W27W30210

This week at a glance 36 issue type(s)
Median axe violations / page
8
Pages with axe violations
3136 of 3136
Median Alfa failures / page
93
Pages with Alfa failures
1568 of 1568
Unique pages audited
3136
Lighthouse performance (median)
44/100 293 sampled details
Lighthouse SEO (median)
100/100
Lighthouse best practices (median)
96/100
Lighthouse agentic (median)
56/100
Words per page (median)
744 main content, nav excluded
Reading ease (median)
44 1449 prose pages
Reading grade (median)
12.5
Misspellings
25+ distinct details
Broken links
414 details
Median page weight
2.0 MB +11 KB worse
Median requests per page
98
Estimated energy per page (mean)
0.5711 Wh
Scan coverage this week (3333 pages · 3549 succeeded of 3791 attempted)
Pages each engine ran on, per the configured weekly sampling rates.
EnginePagesCoverage
axe313694%
resources313694%
plain-language161648%
standards157047%
alfa156847%
sustainability34910%
security33910%
tech31910%
lighthouse2939%
deprecated-html2899%

History & Trends → Severity, Lighthouse and other measures across 16 weeks.

Changes since 2026-W29 5 change(s)

axe-core

  • empty-heading spread: 271 → 345 pages affected (rate: 9% → 11% of pages scanned).
  • landmark-unique shrank: 1468 → 1362 pages affected (rate: 47% → 43% of pages scanned).
  • list spread: 104 → 169 pages affected (rate: 3% → 5% of pages scanned).

Alfa

  • sia-r85 spread: 212 → 287 pages affected (rate: 14% → 18% of pages scanned).
  • sia-r64 spread: 134 → 175 pages affected (rate: 9% → 11% of pages scanned).

Embedded & linked resources

Non-HTML resources this site links to or embeds — PDFs, Office documents, iframes, and media. The site owner is responsible for their accessibility too. Full inventory with first-seen dates: CSV.

New this week (1386)

4212 distinct resources, by type.
TypeCount
Images1432
PDF documents1333
Spreadsheets653
Word/text documents647
Embedded media players142
Presentations4
Video files1