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Site Info - Epa.gov

Overview of web technologies used by Epa.gov.

Website Background

United States Environmental Protection Agency | US EPA

Description on Homepage

Number 6,084 of all websites according to Alexa

Popularity rank

CountryVisitorsCountry Rank
United States58.7%1,870
India8%7,687
Canada2.6%5,242
CityVisitorsCity Rank
New York, NY, US4.4%2,872
Los Angeles, CA, US4.4%3,766
San Francisco, CA, US3.8%2,226

Main visitors locations

Drupal is an open source content management system written in PHP, originally developed by Dries Buytaert.

Drupal 7.58
(version 7.56 used until recently)
(32% of sites use a newer version)

PHP is a popular scripting language for creating web pages.

PHP

ColdFusion is a scripting language used for building web applications, and developed by Adobe Systems.

ColdFusion

Perl is a general-purpose, interpreted language, nowadays also used to create web pages.

Perl

JavaScript is a lightweight, object-oriented, cross-platform scripting language, mainly used within web pages.

JavaScript

jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig.

jQuery 1.7
(83% of sites use a newer version)

HTML5 is the fifth revision of the HTML standard.

HTML5

HTML - Hypertext Mark-up Language - is a language to define web pages.

HTML
(used until recently)

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.

UTF-8

PNG (Portable Network Graphics) is a lossless compression image format, suitable to store graphics with uniformly colored areas, and originally introduced as a free, open-source successor of GIF.

PNG

JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images.

JPEG

Scalable Vector Graphics (SVG) is an XML-based vector image format.

SVG

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Embedded CSS

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Inline CSS

Gzip (GNU zip) is a file compression algorithm.

Gzip Compression

A weak ETag is an HTTP header field for validation of cached web pages, that indicates a semantically equivalent page in the cache.

Weak ETag

The Internet Protocol version 6 (IPv6) provides amongst others a vastly larger address space than the preceding version 4. We consider a website to support IPv6 if a 128-bit address is assigned to it, regardless of the content delivered at that address.

IPv6

HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.

HTTP Strict Transport Security

The websites redirects visitors to its www subdomain, e.g. from example.com to www.example.com.

Default subdomain www

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

Default protocol https

A strong ETag is an HTTP header field for validation of cached web pages, that indicates a byte-for-byte identical page in the cache.

Strong ETag
(used until recently)

The Open Graph protocol, originally developed by Facebook, is an RDFa-based format that enables any web page to become a rich object in a social graph.

Open Graph

Generic RDFa (Resource Description Framework in attributes) is RDFa without further specialization.

Generic RDFa
(used until recently)

DigiCert is an SSL certificate authority. This includes Verizon, whose Enterprise SSL Business has been acquired by DigiCert.

DigiCert

Facebook Social Plugins provide a way for Facebook users to share web pages with their friends.

Facebook

A Twitter Button allows a Twitter user to post a tweet from the visited site.

Twitter

The Pinterest Pin-It button allows website visitors to pin images onto Pinterest.

Pinterest

Google Analytics is a free service to get detailed statistics about the visitors of a website, provided by Google.

Google Analytics

CrazyEgg is a website visitor and click tracking service.

CrazyEgg

New Relic is a web application performance management tool.

New Relic
(used until recently)

The Google Advertising network consists of AdSense, DoubleClick and other services.

Google Ads

The Google Tag Manager is a Google service to support webmasters to manage tags on their websites.

Google Tag Manager

The Apache HTTP Server is a popular open source web server by the Apache Software Foundation.

Apache

China Mobile is a Chinese state-owned telecommunication corporation.

China Mobile
(used until recently)
hosting info based on data from ipinfo.io

Akamai is a content delivery network.

Akamai

United States Government

.gov

United States
Netherlands
Hong Kong
(used until recently)

English

Technology Score

The technology score rates a site based on its technologies in a range from 0 to 100. It consists in a popularity score (how many sites use the same technologies), a traffic score (how much traffic have other sites using the same technologies) and a version score (how many sites use more recent technology versions). Quality alerts also affect the rating.

TotalPopularity TrafficVersion
Technology Score64705943
Content Management Systems48205568
Server-side Programming Languages789164
Client-side Programming Languages7510051
JavaScript Libraries54984617
Markup Languages688452
SSL Certificate Authorities502674
Social Widgets617053
Traffic Analysis Tools829372
Advertising Networks789659
Web Servers536838
Reverse Proxy Services562982

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