Report Summary

  • 38

    Performance

    Renders faster than
    58% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 77% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

sc.water.usgs.gov

South Atlantic Water Science Center (SAWSC) | U.S. Geological Survey

Page Load Speed

2 sec in total

First Response

450 ms

Resources Loaded

1 sec

Page Rendered

541 ms

sc.water.usgs.gov screenshot

About Website

Welcome to sc.water.usgs.gov homepage info - get ready to check Sc Water Usgs best content for United States right away, or after learning these important things about sc.water.usgs.gov

USGS South Carolina Water Science Center - Hydrologic Information for South Carolina

Visit sc.water.usgs.gov

Key Findings

We analyzed Sc.water.usgs.gov page load time and found that the first response time was 450 ms and then it took 1.6 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

sc.water.usgs.gov performance score

38

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value21.9 s

0/100

10%

LCP (Largest Contentful Paint)

Value28.5 s

0/100

25%

SI (Speed Index)

Value44.5 s

0/100

10%

TBT (Total Blocking Time)

Value330 ms

75/100

30%

CLS (Cumulative Layout Shift)

Value0.003

100/100

15%

TTI (Time to Interactive)

Value31.3 s

0/100

10%

Network Requests Diagram

sc.water.usgs.gov

450 ms

common.css

128 ms

custom.css

97 ms

framework.css

137 ms

colorteal.css

98 ms

Our browser made a total of 56 requests to load all elements on the main page. We found that 46% of them (26 requests) were addressed to the original Sc.water.usgs.gov, 14% (8 requests) were made to Usgs.gov and 11% (6 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (450 ms) belongs to the original domain Sc.water.usgs.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 244.0 kB (45%)

Content Size

545.6 kB

After Optimization

301.6 kB

In fact, the total size of Sc.water.usgs.gov main page is 545.6 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 35% of websites need less resources to load. Images take 214.0 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 91.8 kB

  • Original 112.0 kB
  • After minification 96.3 kB
  • After compression 20.2 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 15.7 kB, which is 14% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 91.8 kB or 82% of the original size.

Image Optimization

-10%

Potential reduce by 20.6 kB

  • Original 214.0 kB
  • After minification 193.4 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Sc Water Usgs images are well optimized though.

JavaScript Optimization

-55%

Potential reduce by 102.9 kB

  • Original 186.7 kB
  • After minification 184.2 kB
  • After compression 83.8 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 102.9 kB or 55% of the original size.

CSS Optimization

-87%

Potential reduce by 28.7 kB

  • Original 32.9 kB
  • After minification 17.0 kB
  • After compression 4.2 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Sc.water.usgs.gov needs all CSS files to be minified and compressed as it can save up to 28.7 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 30 (57%)

Requests Now

53

After Optimization

23

The browser has sent 53 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sc Water Usgs. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

sc.water.usgs.gov accessibility score

91

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA IDs are not unique

Best Practices

sc.water.usgs.gov best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

sc.water.usgs.gov SEO score

77

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sc.water.usgs.gov can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Sc.water.usgs.gov main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

Open Graph description is not detected on the main page of Sc Water Usgs. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: