vital-scans open quality ledger

www.cdc.gov: third parties

Third-party origins serving resources to www.cdc.gov across the 441 page(s) measured in 2026-W38. 22 distinct third-party domains, 13 of them serving JavaScript (JS). Costs are medians per page the vendor appears on. · Download CSV

Third-party JavaScript is easy to add and often reduces accessibility and performance — it injects DOM the site owner never reviewed and adds load time. "Pages w/ finding" is the share of pages carrying this vendor that also had an accessibility finding: an association to investigate, not proof the vendor caused it. Third parties vary per page, so a vendor on few pages may simply not have been sampled elsewhere.

Third-party vendors on www.cdc.gov, 2026-W38 — sortable.
Vendor (registrable domain) Pages Median bytes Median requests Median load Pages w/ finding
googletagmanager.com JS 435 155 KB 1 3 ms 100%
google-analytics.com JS 416 0 KB 1 18 ms 100%
altmetric.com JS 34 176 KB 4 263 ms 100%
cloudfront.net JS 34 1 KB 1 31 ms 100%
google.com JS 13 24 KB 1 0 ms 100%
dimensions.ai JS 11 662 KB 6 303 ms 100%
gstatic.com JS 11 52 KB 2 0 ms 100%
ytimg.com 11 40 KB 1 0 ms 100%
googleapis.com JS 11 0 KB 1 0 ms 100%
youtube-nocookie.com JS 9 1.1 MB 9 619 ms 100%
noembed.com 8 1 KB 1 137 ms 100%
doubleclick.net JS 4 0 KB 4 141 ms 100%
ggpht.com 3 4 KB 1 0 ms 100%
powerbigov.us JS 2 10.7 MB 43 2566 ms 100%
youtube.com JS 2 1.1 MB 9 684 ms 100%
facebook.net JS 2 145 KB 2 42 ms 100%
usgovcloudapi.net 2 73 KB 7 0 ms 100%
powerbi.com 2 15 KB 1 0 ms 100%
azure.com 2 2 KB 1 0 ms 100%
googleadservices.com 2 1 KB 1 36 ms 100%
office.net 2 1 KB 1 0 ms 100%
facebook.com 2 0 KB 1 35 ms 100%