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silentspring.org

https://silentspring.org· First analyzed 15 May 2026· Updated 15 May 2026
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silentspring.org
Desktop screenshot of silentspring.org
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Mobile

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Hosting Provider

Pantheon
pantheon.io

IP Address

23.185.0.3

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS54113

Organization

Pantheon

Server

Nginx

CDN

Fastly

Nameservers

ns-1957.awsdns-52.co.uk.ns-359.awsdns-44.com.ns-553.awsdns-05.net.ns-1202.awsdns-22.org.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
560 ms10%
Speed Index
728 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.5 MB
46 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Drupal

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

8 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Facebook Pixel

Fonts

2
Adobe Fonts (Typekit)Adobe Fonts

CSS Frameworks

1
Tailwind CSS

Email Marketing

1
Constant Contact

Web Servers

1
Nginx

SEO Analysis

C65/100
19
6
1
Meta Tags7/15
Content11/12
Headings8/8
Technical17/25
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
S
silentspring.orgsilentspring.org

Home | Silent Spring Institute

No description available for this page.

Title Length30 chars

Recommended: 50-60 chars (~175px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing meta description — important for click-through rates in SERPs

7 issues found

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Crawlability

Sitemap
robots.txt

53 rules

Local SEO

Local Search Readiness

7/100
Poor
2 13 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

D43/100
Bot Access
20/25
Machine Read.
11/25
Schema Data
0/25
Citation
12/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
navheader/footer
Text ratio:6%
Words:511
Token eff.:Optimal
Sections/1K:35.2
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary215w
Descriptive Headingsavg 4.2w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
AI readiness recommendation preview...
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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
A
89/100
14
Passed
1
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
17/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
13/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
9/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
47/100
C
196 mg
CO₂e / view
1.5 MB
Page Weight
60%
Cleaner Than
New Visitor
224 mg
vs
Returning (cached)
112 mg
Annual (10K/mo)
23.5 kg
Emission Segments
Data Center
44 mg
Network
47 mg
Device
105 mg
Resource Breakdown
JavaScript
197.4 KB
Images
1.2 MB
CSS
160.2 KB
HTML
10.8 KB
Green Hosting Not Verified
Pantheon
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

56%Poor
Interactive

HTTPS

No WAF

79d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

04.05.2026

Valid Until

02.08.2026

Subject Alternative Names (3)

silentspring.orgwp.silentspring.orgwww.silentspring.org

SHA-256 Fingerprint

D0:51:88:CE:F0:A4:8C:37:92:2B:9D:67:33:7E:8A:61:D4:DE:B3:F8...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
age
403
cache-control
🟡 900s(max-age=900, public)
content-encoding
📦 Gzip(gzip)
content-language
en
content-length
10729
Good Warning Issue

Email Infrastructure

Google Workspace

Score

95

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

aspmx.l.google.com
alt3.aspmx.l.google.com
alt2.aspmx.l.google.com
alt4.aspmx.l.google.com

+1 more

Domain Information

silentspring.org

Domain Age
29y 4m

Created

14.01.1997

Expires

13.01.2028

Last Updated

07.02.2021

Registrar

Network Solutions, LLC

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
Privacy policy page linked

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
B
73/100
Mobile Friendly1 breakpoint
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width, initial-scale=1.0
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

canada-type-gibson

WCAG Partial
73/100
Readability
/30
24/30

18px · LH 1.50

Hierarchy
/20
16/20

2.22x ratio · ✓ H1→H6

WCAG
/25
17/25

1.06:1 min contrast

Performance
/25
16/25

1 font

Heading Font

canada-type-gibson

Sans40px

Body Font

canada-type-gibson

Sans18px

Contrast Ratio

1.06:1

6 issues

Reading Comfort

~35 CPL

Narrow lines
40px
h1
33px
h2
46px
h3
18px
p
Major Second
Scale

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 35/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 1.1:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.2x larger than body text.

AAdobe FontsBuy on MyFontsFluid Type (rem)Flesch 35

Color Palette

7 unique colors
5.91:1 AA Light
#f8f8f8
Primary· 18.999999999999996%
#616154
Other· 3.3%
#495060
Secondary· 39.7%
#25314f
Secondary· 20.9%
#a09b87
Secondary· 6.2%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Advertising

1
Facebook PixelMid-Market

Ad platforms and retargeting pixels

2

Categories

2

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

20 Resources

16
Scripts
4
Styles
5
Async
2
Defer

Top Script Sources

local(8)static.addtoany.com(3)connect.facebook.net(2)gstatic.com(1)googletagmanager.com(1)

Website Identity

silentspring.org

info@silentspring.org
29 years old
Location detected: 🇺🇸 United Statesvia ip
Network Solutions, LLC📧 Google Workspaceen

Social Profiles

InstagramLinkedIn

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Last analyzed: 15 May 2026 at 02:37

Historical Analysis & Change Tracking