Kilotest: Diagnoses of element in head invalid violation by HTML element 1 on Clean Air Task Force (CATF) page

Basics

About the page

• URL: https://www.catf.us/
• Tested 3 days ago on 2026-10-07 at 19:52 by job 261007T1941-eso
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 12
  • Violations: 697
  • Violators: 328
  • Issues: 52
• Download the full technical report (JSON)

About the issue

• Why it matters: Browser processes the page improperly
• Priority: high
• Related WCAG standard: 4.1
• Reported by 2 rule engines (ASLint + Testaro)
• Violations: 3
• Violators: 2

About the violator

• Tag name: HEAD
• Text: [not applicable]
• Start tag: <head>
• XPath: /html/head[1]
• Bounding box: [not obtained]
• Reported by ASLint

Diagnoses

Here is how rule engines diagnose the element in head invalid issue for HTML element 1 of the Clean Air Task Force (CATF) page.

1. Expected <code><img src="https://tags.srv.stackadapt.com/rt?sid=SeILt3n3fz62zaCyWqZ9hT"></code> not to be a child of <code><head></code>.

   Rule engine: ASLint (eSSENTIAL Accessibility)

   Rule: elements_not_allowed_in_head

2. Expected <code><img src="https://cnv.event.prod.bidr.io/log/cnv?tag_id=9166&buzz_key=dsp&value=&segment_key=dsp-41635&account_id=102&order=[ORDER]&ord=[CACHEBUSTER]"></code> not to be a child of <code><head></code>.

   Rule engine: ASLint (eSSENTIAL Accessibility)

   Rule: elements_not_allowed_in_head