Atsdr.cdc.gov - SEO Checker

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Overview of the SEO Check
Meta information
95% 
Page quality
97% 
Page structure
100% 
Link structure
42% 
Server
100% 
External factors
83% 
SEO Score
Response time
0.12 s
File size
46.40 kB
Words
532
Media files
18
Number of links
87 internal / 68 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Agency for Toxic Substances and Disease Registry | ATSDR
The length of the page title is perfect. (539 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
This webpage describes information on ATSDR's programs.
The length of the meta description is perfect. (366 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://www.atsdr.cdc.gov/index.html
The specified canonical link points to a different page.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en-us
Server location: United States of America
The following language is defined by HTML: en-us
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The character encoding is not specified in the HTTP header.
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
viewportwidth=device-width, initial-scale=1, shrink-to-fit=no
mobile-web-app-capableyes
apple-mobile-web-app-capableyes
msapplication-TileColor#0056b3
theme-color#0056b3
descriptionThis webpage describes information on ATSDR's programs.
robotsindex, archive
DC.date2025-04-21T09:29:50Z
cdc:last_published2025-04-21T09:30:44Z
cdc:template_version5.0
article:authorCDC
cdc:first_publishedNovember 12, 2024
cdc:last_updatedApril 21, 2025
cdc:last_reviewedApril 21, 2025
cdc:content_sourceAGENCY FOR TOXIC SUBSTANCES AND DISEASE REGISTRY
cdc:maintained_byAGENCY FOR TOXIC SUBSTANCES AND DISEASE REGISTRY
cdc:content_id305699
cdc:build4918
cdc:version4.25.3
cdc:page_typecdc_dfe
cdc:page_origindfe
cdc:wcms_build4.25.3 - b.4918
cdc:dfe_version0.3
cdc:dfe_content_typecdc_homepage
cdc:dfe_content_type_version1.1.0
langen-us
twitter:cardsummary
twitter:titleAgency for Toxic Substances and Disease Registry
twitter:urlhttps://www.atsdr.cdc.gov/index.html
twitter:descriptionThis webpage describes information on ATSDR's programs.
twitter:site@CDCEnvironment
twitter:creator@CDCEnvironment
twitter:image:srchttps://www.atsdr.cdc.gov/images/spotlights/TSP-spotlight.jpg?_=43355
fb:app_id205691699516606
og:typearticle
og:titleAgency for Toxic Substances and Disease Registry
og:urlhttps://www.atsdr.cdc.gov/index.html
og:descriptionThis webpage describes information on ATSDR's programs.
og:site_nameAgency for Toxic Substances and Disease Registry
og:authorCDC
og:imagehttps://www.atsdr.cdc.gov/images/spotlights/TSP-spotlight.jpg?_=43355
og:image:typeimage/jpeg
og:updated_time2025-04-21T09:29:50-04:00
X-UA-CompatibleIE=Edge
charsetUTF-8

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Page quality

Content
(Critically important)
This page contains 532 words. That's ok.
22% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
Words from the H1 heading are used in the page content.
The page contains a listing, which indicates a good text layout.
3 paragraphs were found on this page.
The text content is perfect.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 12.5 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width, initial-scale=1, shrink-to-fit=no" is provided.
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 11 tags for this page.
Image SEO
(Somewhat important)
3 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
This page is optimized perfectly for social networks.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
...ePackage/5.0/img/uswds/us_flag_small.pngU.S. flag
...tePackage/5.0/img/uswds/icon-dot-gov.svgNo alt attribute provided
...latePackage/5.0/img/uswds/icon-https.svgNo alt attribute provided
/TemplatePackage/5.0/img/logo/atsdr.svgAgency for Toxic Substances and Disease Registry
/TemplatePackage/5.0/img/logo/atsdr-alt.svgAgency for Toxic Substances and Disease Registry
...al-profiles/media/images/2024/11/TSP.jpgbeaker with formula in laboratory
https://atsdr.cdc.gov/images/video.jpgFrom the Perspective of Our Communities: In Their Own Words cover page
https://atsdr.cdc.gov/images/PHA.jpgPublic Health Assessments & Health Consultations
...a/images/2024/11/girl-drinking-water.jpgA small child with a pink shirt drinking water out of a glass.
/media/images/2024/09/asbestos-fibers.jpgHand with magnifying glass examines asbestos fibers in stone
...ion-Program-v2a-t007-1200x675-c3fa75.pngDecorative image of healthy people in a healthy community
...4/10/about-the-ACE-program-uncropped.jpgThree workers in hazmat suits inspect a train tanker car.
...se/media/images/2024/07/tanker-truck.jpgTanker truck dangerous goods
.../images/2024/07/APPLETREE-Houses-2_2.pngATSDR's Partnership to Promote Local Efforts to Reduce Environmental Exposure (APPLETREE) Cooperative Agreement Program
...a/images/2024/10/veterans-day-parade.jpgveterans day parade
/images/als/brad-kimmie-dusek.jpgNo alt attribute provided
...media/images/2024/08/Redevelopment_1.pngLand Reuse - an old site turned into a garden center.
...platePackage/5.0/img/logo/atsdr-text.svgAgency for Toxic Substances and Disease Registry

Page structure

H1 heading
(Critically important)
Agency for Toxic Substances and Disease Registry
The H1 heading is perfect.
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 Agency for Toxic Substances and Disease Registry
H2 For Everyone
H2 Other ATSDR Topics
H2 ATSDR
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are too many external links (68) on this page.

Found links on this page

LinkAttributesAnchor text
https://atsdr.cdc.gov/Anchor Skip directly to site content
https://atsdr.cdc.gov/Anchor Skip directly to search
https://atsdr.cdc.gov/Anchor Here's how you know
https://www.atsdr.cdc.gov/Subdomain IMG-ALT Agency for Toxic Substances and Disease Registry
https://atsdr.cdc.gov/index.htmlText duplicate Agency for Toxic Substances and Disease Registry
/about/index.htmlAbout ATSDR
A-TITLE About ATSDR
/programs/index.htmlA-Z Index
A-TITLE A-Z Index
/reports/index.htmlAnnual Reports
A-TITLE Annual Reports
/impact/index.htmlATSDR's Impact on Public Health
A-TITLE ATSDR's Impact on Public Health
/contact/index.htmlContact Us
A-TITLE Contact Us
/regional-offices/index.htmlATSDR Regional Offices
A-TITLE ATSDR Regional Offices
/newsroom/index.htmlNewsroom
A-TITLE Newsroom
https://atsdr.cdc.gov/site.htmlView All
https://www.atsdr.cdc.gov/Subdomain Text duplicate IMG-ALT Agency for Toxic Substances and Disease Registry
https://atsdr.cdc.gov/index.htmlATSDR
/about/index.htmlText duplicate About ATSDR
/programs/index.htmlText duplicate A-Z Index
/reports/index.htmlText duplicate Annual Reports
/impact/index.htmlText duplicate ATSDR's Impact on Public Health
/contact/index.htmlText duplicate Contact Us
/regional-offices/index.htmlText duplicate ATSDR Regional Offices
/newsroom/index.htmlText duplicate Newsroom
https://atsdr.cdc.gov/site.htmlText duplicate View All
https://atsdr.cdc.gov/index.htmlHome
https://atsdr.cdc.gov/site.htmlView All ATSDR
/about/index.htmlText duplicate About ATSDR
/programs/index.htmlText duplicate A-Z Index
/reports/index.htmlText duplicate Annual Reports
/impact/index.htmlText duplicate ATSDR's Impact on Public Health
/contact/index.htmlText duplicate Contact Us
/regional-offices/index.htmlText duplicate ATSDR Regional Offices
/newsroom/index.htmlText duplicate Newsroom
https://atsdr.cdc.gov/site.htmlText duplicate View All
/toxicological-profiles/about/...IMG-ALT beaker with formula in laboratory
A-TITLE Toxicological Profiles
/toxicological-profiles/about/...Toxicological Profiles
/toxicological-profiles/about/...Learn More
A-TITLE Learn More
/in-their-own-words-video.htmlIMG-ALT From the Perspective of Our Communities: In Their Own Words cover page
A-TITLE In Their Own Words
/in-their-own-words-video.htmlIn Their Own Words
https://atsdr.cdc.gov/PHA.htmlIMG-ALT Public Health Assessments & Health Consultations
A-TITLE Public Health Assessments & Health Consultations
https://atsdr.cdc.gov/PHA.htmlText duplicate Public Health Assessments & Health Consultations
/pfas/index.htmlIMG-ALT A small child with a pink shirt drinking water out of a glass.
A-TITLE Per- and Polyfluoroalkyl Substances (PFAS) and Your Health
/pfas/index.htmlPer- and Polyfluoroalkyl Substances (PFAS) and Your Health
/asbestos/about/index.htmlIMG-ALT Hand with magnifying glass examines asbestos fibers in stone
A-TITLE Asbestos and Your Health
/asbestos/about/index.htmlAsbestos and Your Health
/place-health/index.htmlIMG-ALT Decorative image of healthy people in a healthy community
A-TITLE Place and Health
/place-health/index.htmlPlace and Health
/ace/php/about/index.htmlIMG-ALT Three workers in hazmat suits inspect a train tanker car.
A-TITLE Assessment of Chemical Exposures (ACE) Program
/ace/php/about/index.htmlAssessment of Chemical Exposures (ACE) Program
/emergency-response/resources/...IMG-ALT Tanker truck dangerous goods
A-TITLE ATSDR Emergency Response
/emergency-response/resources/...ATSDR Emergency Response
/state-cooperative-agreements/...IMG-ALT ATSDR's Partnership to Promote Local Efforts to Reduce Environmental Exposure (APPLETREE) Cooperative Agreement Program
A-TITLE APPLETREE Cooperative Agreement Program
/state-cooperative-agreements/...APPLETREE Cooperative Agreement Program
/camp-lejeune/index.htmlIMG-ALT veterans day parade
A-TITLE Camp Lejeune, North Carolina
/camp-lejeune/index.htmlCamp Lejeune, North Carolina
https://www.cdc.gov/als/index....External Subdomain A-TITLE National Amyotrophic Lateral Sclerosis (ALS) Registry
https://www.cdc.gov/als/index....External Subdomain Text duplicate National Amyotrophic Lateral Sclerosis (ALS) Registry
/land-reuse-health-program/abo...IMG-ALT Land Reuse - an old site turned into a garden center.
A-TITLE ATSDR Land Reuse Health Program
/land-reuse-health-program/abo...ATSDR Land Reuse Health Program
https://atsdr.cdc.gov/index.htmlText duplicate ATSDR
https://atsdr.cdc.gov/site.htmlText duplicate View All
/about/index.htmlText duplicate About ATSDR
/programs/index.htmlText duplicate A-Z Index
/reports/index.htmlText duplicate Annual Reports
/impact/index.htmlText duplicate ATSDR's Impact on Public Health
/contact/index.htmlText duplicate Contact Us
/regional-offices/index.htmlText duplicate ATSDR Regional Offices
/newsroom/index.htmlText duplicate Newsroom
https://atsdr.cdc.gov/site.htmlText duplicate View All
https://tools.cdc.gov/campaign...External Subdomain Anchor Sign up for Email Updates
https://atsdr.cdc.gov/Anchor Text duplicate Contact Us
/contacts.htmlSubdomain Text duplicate Contact Us
/contacts.htmlSubdomain Contact ATSDR
https://atsdr.cdc.gov/Anchor Text duplicate About ATSDR
https://www.atsdr.cdc.gov/about/Subdomain Text duplicate About ATSDR
https://jobs.cdc.gov/index.htmlExternal Subdomain Careers & Jobs
https://atsdr.cdc.gov/Anchor Policies
https://www.cdc.gov/other/acce...External Subdomain Accessibility
https://www.cdc.gov/Other/disc...External Subdomain Anchor External Links
https://www.cdc.gov/other/priv...External Subdomain Privacy
https://www.cdc.gov/other/poli...External Subdomain Web Policies
https://www.cdc.gov/foia/External Subdomain FOIA
https://oig.hhs.gov/External Subdomain OIG
https://www.cdc.gov/oeeowe/no-...External Subdomain No Fear Act
https://www.cdc.gov/other/nond...External Subdomain Nondiscrimination
https://www.hhs.gov/vulnerabil...External Subdomain Vulnerability Disclosure Policy
https://atsdr.cdc.gov/Anchor Languages
https://www.atsdr.cdc.gov/es/Subdomain Español
https://www.cdc.gov/other/lang...External Subdomain Language Assistance
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate Español
https://www.cdc.gov/other/lang...External Subdomain Anchor 繁體中文
https://www.cdc.gov/other/lang...External Subdomain Anchor Tiếng Việt
https://www.cdc.gov/other/lang...External Subdomain Anchor 한국어
https://www.cdc.gov/other/lang...External Subdomain Anchor Tagalog
https://www.cdc.gov/other/lang...External Subdomain Anchor Русский
https://www.cdc.gov/other/lang...External Subdomain Anchor العربية
https://www.cdc.gov/other/lang...External Subdomain Anchor Kreyòl Ayisyen
https://www.cdc.gov/other/lang...External Subdomain Anchor Français
https://www.cdc.gov/other/lang...External Subdomain Anchor Polski
https://www.cdc.gov/other/lang...External Subdomain Anchor Português
https://www.cdc.gov/other/lang...External Subdomain Anchor Italiano
https://www.cdc.gov/other/lang...External Subdomain Anchor Deutsch
https://www.cdc.gov/other/lang...External Subdomain Anchor 日本語
https://www.cdc.gov/other/lang...External Subdomain Anchor فارسی
https://www.cdc.gov/other/lang...External Subdomain Anchor English
https://atsdr.cdc.gov/Anchor Archive
https://archive.cdc.gov/External Subdomain CDC Archive
https://stacks.cdc.gov/External Subdomain Public Health Publications
https://atsdr.cdc.gov/Anchor Text duplicate Contact Us
/contacts.htmlSubdomain Text duplicate Contact Us
/contacts.htmlSubdomain Text duplicate Contact ATSDR
https://atsdr.cdc.gov/Anchor Text duplicate About ATSDR
https://www.atsdr.cdc.gov/about/Subdomain Text duplicate About ATSDR
https://jobs.cdc.gov/index.htmlExternal Subdomain Text duplicate Careers & Jobs
https://atsdr.cdc.gov/Anchor Text duplicate Policies
https://www.cdc.gov/other/acce...External Subdomain Text duplicate Accessibility
https://www.cdc.gov/Other/disc...External Subdomain Anchor Text duplicate External Links
/privacy.htmlSubdomain Text duplicate Privacy
/privacy.htmlSubdomain Text duplicate Web Policies
https://www.cdc.gov/foia/External Subdomain Text duplicate FOIA
https://oig.hhs.gov/External Subdomain Text duplicate OIG
https://www.cdc.gov/oeeowe/no-...External Subdomain Text duplicate No Fear Act
https://www.cdc.gov/other/nond...External Subdomain Text duplicate Nondiscrimination
https://www.hhs.gov/vulnerabil...External Subdomain Text duplicate Vulnerability Disclosure Policy
https://atsdr.cdc.gov/Anchor Text duplicate Languages
https://www.atsdr.cdc.gov/es/Subdomain Text duplicate Español
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate Español
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate 繁體中文
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate Tiếng Việt
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate 한국어
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate Tagalog
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate Русский
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate العربية
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate Kreyòl Ayisyen
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate Français
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate Polski
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate Português
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate Italiano
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate Deutsch
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate 日本語
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate فارسی
https://www.cdc.gov/other/lang...External Subdomain Anchor Text duplicate English
https://atsdr.cdc.gov/Anchor Text duplicate Archive
https://archive.cdc.gov/External Subdomain Text duplicate CDC Archive
https://stacks.cdc.gov/External Subdomain Text duplicate Public Health Publications
https://www.atsdr.cdc.gov/Subdomain Text duplicate IMG-ALT Agency for Toxic Substances and Disease Registry
https://www.facebook.com/CDCExternal Subdomain No Text
https://twitter.com/CDCEnviron...External No Text
https://www.instagram.com/CDCgovExternal Subdomain No Text
https://www.linkedin.com/compa...External Subdomain No Text
https://www.youtube.com/cdcExternal Subdomain No Text
https://www.pinterest.com/cdcgovExternal Subdomain No Text
https://www.snapchat.com/add/c...External Subdomain No Text
https://www.cdc.gov/rssExternal Subdomain No Text
https://hhs.gov/External HHS.gov
https://usa.gov/External USA.gov

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://atsdr.cdc.gov/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
The page response time is excellent with 0.12 seconds.
The file size of the HTML document is fine (46 kB).

HTTP Response Header

NameValue
content-typetext/html
srv3
access-control-allow-origin*
x-ua-compatibleIE=edge
access-control-allow-headersAccess-Control-Allow-Headers, Origin, Accept, X-Requested-With, Content-Type, Access-Control-Request-Method, Access-Control-Request-Headers
varyAccept-Encoding
content-encodinggzip
content-length8691
dateSat, 10 May 2025 19:56:02 GMT
set-cookie123 Characters
strict-transport-securitymax-age=31536000 ; includeSubDomains ; preload
statuscode200
http_versionHTTP/2

External factors

This page is referenced by wikipedia.
This page is very well linked from other websites.
This page has backlinks from 11 referring domains.
This page has 13 backlinks.
This page has backlinks from 10 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

# robots.txt for http://www.atsdr.cdc.gov/

User-agent: *
Disallow: /cgi-bin/        # Executables only
Disallow: /usage/          # Usage statistics pages only
Disallow: /jobs/           # Job postings - short expiration
Disallow: /gsql/           # This is an infinite database query space
Disallow: /CHEM/           # .gif and .xyz chemical files only

Sitemap: https://www.atsdr.cdc.gov/wcms-auto-sitemap-index.xml

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Search preview

atsdr.cdc.gov
Agency for Toxic Substances and Disease Registry | ATSDR
This webpage describes information on ATSDR's programs.

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
ATSDR80%Check
Toxic65%Check
Toxic Substances64%Check
Substances63%Check
Agency63%Check
Disease63%Check
Disease Registry63%Check
Registry62%Check
gov52%Check
Program50%Check
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