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deltares.nl

https://deltares.nl· First analyzed 30 Apr 2026· Updated 30 Apr 2026
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deltares.nl
Desktop screenshot of deltares.nl
Mobile screenshot of deltares.nl
Mobile

Sponsored

Hosting Provider

Exonet

IP Address

178.22.57.108

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇳🇱 Zevenaar, The Netherlands

ASN

AS12859

Server

Nginx

CDN

CDN

Nameservers

ns2.deltares.nl.ns1.deltares.nl.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
513 ms10%
Speed Index
667 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
795 KB
71 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Hybrid
⚙️ SSR
Frontend
Framework
Nuxt.js
Styling
Tailwind CSS
Infrastructure
Hosting
Exonet
CDN
CDN

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

7 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Matomo

Meta Frameworks

1
Nuxt.js

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Web Servers

1
Nginx

SEO Analysis

B78/100
23
5
0
Meta Tags14/15
Content10/12
Headings8/8
Technical20/25
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile3/4
Indexability3/3
D
deltares.nldeltares.nl

Homepage - Enabling Delta Life  | Deltares

As an independent knowledge institute, Deltares works on innovative solutions in the field of water and subsurface. Learn more about our expertise.

Title Length42 chars

Recommended: 50-60 chars (~250px / 580px)

Description Length147 chars

Recommended: 120-160 chars

Issues (0)

    5 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    17 URLs

    17 sub-sitemaps

    robots.txt

    10 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    13/100
    Poor
    4 12 2

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

    Sponsored

    AI & LLM Readiness

    F36/100
    Bot Access
    20/25
    Machine Read.
    7/25
    Schema Data
    0/25
    Citation
    9/25

    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
    Text ratio:2%
    Words:2,257
    Token eff.:Optimal

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary
    Descriptive Headingsavg 4w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (12)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    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.
    B
    77/100
    13
    Passed
    2
    Critical
    3
    Warnings
    Images & Alt Text
    18/20
    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
    10/15
    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
    15/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    2/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    2 recommendations
    • •Accessibility recommendation preview...
    Upgrade to view recommendations

    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.
    75/100
    B
    80 mg
    CO₂e / view
    795.3 KB
    Page Weight
    80%
    Cleaner Than
    New Visitor
    92 mg
    vs
    Returning (cached)
    46 mg
    Annual (10K/mo)
    9.6 kg
    Emission Segments
    Data Center
    4 mg
    Network
    24 mg
    Device
    53 mg
    Resource Breakdown
    JavaScript
    532.5 KB
    Images
    6.0 KB
    Fonts
    121.5 KB
    HTML
    135.4 KB
    Green Hosting Verified
    BIT
    GWF Verified
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    D

    Security Score

    56%Poor
    Interactive

    HTTPS

    No WAF

    189d

    Certificate Details

    Type

    Organization Validated (OV)

    Certificate Authority

    Hellenic Academic and Research Institutions CA

    Key Algorithm

    RSA (4096 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    06.11.2025

    Valid Until

    06.11.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (14)

    deltares.nla-cms.deltares.nlbridge.deltares.nla.deltares.nlp-bridge.deltares.nlt.deltares.nlt-cms.deltares.nlwww.deltares.nl+6 more

    SHA-256 Fingerprint

    43:30:53:0E:A6:C9:0E:4D:E2:77:99:14:59:4F:6B:36:9F:1A:CA:70...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    accept-ranges
    bytes
    access-control-allow-credentials
    true
    access-control-allow-origin
    https://cms.deltares.nl
    age
    0
    content-encoding
    📦 Gzip(gzip)
    content-security-policy
    frame-ancestors 'self' https://a-cms.deltares.nl https://cms...
    Good Warning Issue

    Email Infrastructure

    Microsoft 365

    Score

    98

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (1)

    deltares-nl.mail.protection.outlook.com

    Domain Information

    deltares.nl

    Domain Age
    19y 4m

    Created

    19.12.2006

    Last Updated

    24.01.2019

    Registrar

    Metaregistrar B.V.

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookiebot

    Cookie Consent Banner
    Cookiebot
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Cookiebot
    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.
    A
    84/100
    Mobile Friendly82 breakpoints
    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
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Franca

    WCAG Partial
    78/100
    Readability
    /30
    24/30

    18px · LH 1.61

    Hierarchy
    /20
    18/20

    4.22x ratio · ✓ H1→H6

    WCAG
    /25
    16/25

    1.65:1 min contrast

    Performance
    /25
    20/25

    1 font · 3 req

    Heading Font

    Franca

    Sans76px

    Body Font

    Franca

    Sans18px

    Contrast Ratio

    1.65:1

    13 issues

    Reading Comfort

    ~38 CPL

    Narrow lines
    76px
    h1
    56px
    h2
    40px
    h3
    24px
    h4
    18px
    p

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

    ⚠️ Partial contrast: 13 elements below WCAG AA threshold (min 1.6:1).

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

    ✅ Strong hierarchy: Headlines are 4.2x larger than body text.

    ✅ Lean font stack: 1 font families keeps load times fast.

    ✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

    Buy on MyFonts

    Color Palette

    8 unique colors
    7.46:1 AAA Light
    #ffffff
    Primary· 33.6%
    #545557
    Other· 10.4%
    #00442d
    Accent· 20.2%
    #121a2e
    Primary· 13.6%
    #0c1017
    Secondary· 12.899999999999999%
    #20284b
    Secondary· 2.9%
    #24483c
    Secondary· 1.2%

    Business & Marketing Stack

    3 Tools Detected

    Advanced

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    Privacy & Cookies

    1
    CookiebotMid-Market

    Cookie consent and privacy compliance tools

    2

    Categories

    3

    Total Tools

    0

    Enterprise

    1

    Mid-Market

    Assessment: Well-developed marketing technology stack

    Sponsored

    Scripts & Styles

    19 Resources

    19
    Scripts
    0
    Styles
    3
    Async
    12
    Defer

    Top Script Sources

    local(15)deltares-analytics.containers.piwik.pro(2)policy.app.cookieinformation.com(2)

    Website Identity

    deltares.nl

    19 years old
    Location detected: 🇳🇱 Netherlandsvia tld
    Metaregistrar B.V.📧 Microsoft 365en

    Sponsored

    Last analyzed: 30 Apr 2026 at 15:21

    Historical Analysis & Change Tracking