54
SEO audit for rivm.nl
Rijksinstituut voor Volksgezondheid en Milieu | RIVM
Health 54/100 (fair) · 50 pages crawled · generated 2026-08-26
Download Markdown report (feed to ChatGPT / Claude / Cursor)
50
pages crawled
48
indexable pages
10
errors
139
warnings
151
notices
0
orphan pages
0
broken links
Category breakdown
| Category | Score | Errors | Warnings | Notices |
|---|---|---|---|---|
| Structured Data | 88 | 6 | 0 | 0 |
| Crawlability | 96 | 2 | 0 | 1 |
| Sitemap | 96 | 2 | 0 | 1 |
| Performance | 71 | 0 | 48 | 55 |
| Meta Description | 75 | 0 | 42 | 5 |
| Content | 80 | 0 | 34 | 3 |
| Titles | 93 | 0 | 11 | 0 |
| Budget | 99 | 0 | 2 | 0 |
| Robots | 99 | 0 | 1 | 0 |
| URL | 99 | 0 | 1 | 13 |
| Agent Readiness | 100 | 0 | 0 | 15 |
| Images | 100 | 0 | 0 | 3 |
| Security | 100 | 0 | 0 | 7 |
| Social | 100 | 0 | 0 | 48 |
Findings
Errors (3 rules)
error JSON-LD block missing @context or @type
Rule schema.no_context_type · Structured Data · 6 occurrence(s)
- https://www.rivm.nl/IB/sociaalwetenschappelijk-onderzoek-naar-vaccineren-SocioVax-IB0325 — a JSON-LD block is missing @context or @type — Google can't parse it, so no rich result is possible. Add both fields (@context="https://schema.org" and a valid @type).
- https://www.rivm.nl/IB/weblog/nieuw-in-nederland-rsv-immunisatie-voor-zuigelingen-IB1025 — a JSON-LD block is missing @context or @type — Google can't parse it, so no rich result is possible. Add both fields (@context="https://schema.org" and a valid @type).
- https://www.rivm.nl/profiel/redactie-infectieziekten-bulletin — a JSON-LD block is missing @context or @type — Google can't parse it, so no rich result is possible. Add both fields (@context="https://schema.org" and a valid @type).
- https://www.rivm.nl/weblog/gedwongen-opnames-voor-tuberculose-in-nederland-2000-2019/IB-11-2020 — a JSON-LD block is missing @context or @type — Google can't parse it, so no rich result is possible. Add both fields (@context="https://schema.org" and a valid @type).
- https://www.rivm.nl/weblog/gesignaleerd-IB-12-2020 — a JSON-LD block is missing @context or @type — Google can't parse it, so no rich result is possible. Add both fields (@context="https://schema.org" and a valid @type).
- https://www.rivm.nl/weblog/ib/snelle-en-doeltreffende-uitbraakrespons-door-sterk-ggd-netwerk/IB-03-2026 — a JSON-LD block is missing @context or @type — Google can't parse it, so no rich result is possible. Add both fields (@context="https://schema.org" and a valid @type).
error Non-200 URL listed in sitemap
Rule sitemap.not_200 · Sitemap · 2 occurrence(s)
- https://www.rivm.nl/documenten%20/infectieziekten-bulletin/jaargang-16-nummer-7 — listed in sitemap but status 400
- https://www.rivm.nl/https%3A//www.rivm.nl/documenten/factsheet-gli-monitor-tweede — listed in sitemap but status 404
error Client error (4xx) response
Rule status.4xx · Crawlability · 2 occurrence(s)
Warnings (7 rules)
warning robots.txt-disallowed URL receives internal links (crawl-budget leak)
Rule budget.disallow_linked · Budget · 2 occurrence(s)
- https://www.rivm.nl/en/node/233851 — internal links point to https://www.rivm.nl/en/node/233851, which robots.txt disallows for Googlebot — Googlebot discovers the URL, checks robots, then rejects it without indexing, wasting crawl budget and losing the link equity. Remove the internal links, or use noindex instead of Disallow if the page should be fetchable. Linked from: https://www.rivm.nl/en/documenten/review-of-hpv-vaccination-in-netherlands, https://www.rivm.nl/en/throughoutthelifecourse, https://www.rivm.nl/en/documenten/lchv/reiniging-seksbedrijven-EN.
- https://www.rivm.nl/node/182601 — internal links point to https://www.rivm.nl/node/182601, which robots.txt disallows for Googlebot — Googlebot discovers the URL, checks robots, then rejects it without indexing, wasting crawl budget and losing the link equity. Remove the internal links, or use noindex instead of Disallow if the page should be fetchable. Linked from: https://www.rivm.nl/weblog/gesignaleerd-IB-12-2020.
warning Thin content (low word count)
Rule content.thin · Content · 34 occurrence(s)
- https://www.rivm.nl/2019%20emissiefactoren%20EC%20voor%20snelwegen%20en%20niet%20snelwegen — 137 words
- https://www.rivm.nl/2019%20emissiefactoren%20voor%20snelwegen%20en%20niet%20snelwegen — 131 words
- https://www.rivm.nl/coronavirus-covid-19/omt/omt-80 — 192 words
- https://www.rivm.nl/cpt/algemeen-tuberculose/nationaal-plan-tuberculosebestrijding — 135 words
- https://www.rivm.nl/cpt/kwaliteit-wet-en-regelgeving/kwaliteit/protocol_visitaties_tbc — 159 words
- https://www.rivm.nl/cpt/werkwijze-vaststellen-tuberculose-landenlijst — 145 words
- https://www.rivm.nl/documenten/infectieziekten-bulletin/jaargang-18-nummer-1 — 177 words
- https://www.rivm.nl/documenten/notitie-ruwe-schets-van-problemen-voor-behandeling-van-nederlandse-patienten-bij — 166 words
- https://www.rivm.nl/en/documenten/lchv/reiniging-seksbedrijven-EN — 161 words
- https://www.rivm.nl/factsheet-determinanten — 179 words
- https://www.rivm.nl/factsheet-thuiswonende-ouderen-tijdens-COVID-19 — 127 words
- https://www.rivm.nl/hitte/documenten/infographic-nationaal-hitteplan-code-geel — 194 words
- https://www.rivm.nl/hygienerichtlijnen/basisscholen/informatie-over-ziektebeelden-voor-basisscholen — 138 words
- https://www.rivm.nl/infectieziekten-bulletin/documenten/jaargang-7-nummer-12 — 179 words
- https://www.rivm.nl/instructies-sequencing-SARS-CoV-2-uitbraak-BCO-reisonderzoek — 136 words
- https://www.rivm.nl/kiemsurveillance-instructies-deelnemende-laboratoria — 130 words
- https://www.rivm.nl/media/114611 — 119 words
- https://www.rivm.nl/monitor-langer-thuis/resultaten-2019/dashboard-monitor-langer-thuis-2019 — 137 words
- https://www.rivm.nl/omt77-bijlage-mondneusmaskers — 162 words
- https://www.rivm.nl/pas-ortho-dataspecificaties-algoritme — 119 words
- https://www.rivm.nl/pas-ortho-handleiding-implementatie — 154 words
- https://www.rivm.nl/pas-ortho-programma-van-eisen — 135 words
- https://www.rivm.nl/pas-ortho-protocol — 196 words
- https://www.rivm.nl/pm10bgcorrgcn2019 — 107 words
- https://www.rivm.nl/tekenpas — 168 words
warning Missing meta description
Rule meta_desc.missing · Meta Description · 42 occurrence(s)
- https://www.rivm.nl/
- https://www.rivm.nl/2019%20emissiefactoren%20EC%20voor%20snelwegen%20en%20niet%20snelwegen
- https://www.rivm.nl/2019%20emissiefactoren%20voor%20snelwegen%20en%20niet%20snelwegen
- https://www.rivm.nl/bevolkingsonderzoek-baarmoederhalskanker/eenvoudige-uitleg
- https://www.rivm.nl/coronavirus-covid-19/omt/omt-80
- https://www.rivm.nl/cpt/kwaliteit-wet-en-regelgeving/kwaliteit/protocol_visitaties_tbc
- https://www.rivm.nl/documenten/infectieziekten-bulletin/jaargang-18-nummer-1
- https://www.rivm.nl/documenten/notitie-ruwe-schets-van-problemen-voor-behandeling-van-nederlandse-patienten-bij
- https://www.rivm.nl/en/documenten/lchv/reiniging-seksbedrijven-EN
- https://www.rivm.nl/en/documenten/review-of-hpv-vaccination-in-netherlands
- https://www.rivm.nl/en/throughoutthelifecourse
- https://www.rivm.nl/factsheet-determinanten
- https://www.rivm.nl/factsheet-thuiswonende-ouderen-tijdens-COVID-19
- https://www.rivm.nl/hitte/documenten/infographic-nationaal-hitteplan-code-geel
- https://www.rivm.nl/hygienerichtlijnen/basisscholen/informatie-over-ziektebeelden-voor-basisscholen
- https://www.rivm.nl/infectieziekten-bulletin/documenten/jaargang-7-nummer-12
- https://www.rivm.nl/instructies-sequencing-SARS-CoV-2-uitbraak-BCO-reisonderzoek
- https://www.rivm.nl/kiemsurveillance-instructies-deelnemende-laboratoria
- https://www.rivm.nl/landelijk-meetnet-effecten-mestbeleid/onderzoeksresultaten/aan%20LMM%20gerelateerde%20rapporten
- https://www.rivm.nl/legionella/draaiboek/bijlage-indeling-waterinstallaties
- https://www.rivm.nl/media/114611
- https://www.rivm.nl/monitor-langer-thuis/resultaten-2019/dashboard-monitor-langer-thuis-2019
- https://www.rivm.nl/omt77-bijlage-mondneusmaskers
- https://www.rivm.nl/pm10bgcorrgcn2019
- https://www.rivm.nl/tekenpas
warning Render-blocking script in <head> (no defer/async)
Rule perf.render_blocking · Performance · 48 occurrence(s)
- https://www.rivm.nl/ — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/2019%20emissiefactoren%20EC%20voor%20snelwegen%20en%20niet%20snelwegen — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/2019%20emissiefactoren%20voor%20snelwegen%20en%20niet%20snelwegen — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/bevolkingsonderzoek-baarmoederhalskanker/eenvoudige-uitleg — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/coronavirus-covid-19/omt/omt-80 — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/cpt/kwaliteit-wet-en-regelgeving/kwaliteit/protocol_visitaties_tbc — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/documenten/infectieziekten-bulletin/jaargang-18-nummer-1 — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/documenten/notitie-ruwe-schets-van-problemen-voor-behandeling-van-nederlandse-patienten-bij — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/en/documenten/lchv/reiniging-seksbedrijven-EN — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/en/documenten/review-of-hpv-vaccination-in-netherlands — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/en/throughoutthelifecourse — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/factsheet-determinanten — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/factsheet-thuiswonende-ouderen-tijdens-COVID-19 — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/hitte/documenten/infographic-nationaal-hitteplan-code-geel — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/hygienerichtlijnen/basisscholen/informatie-over-ziektebeelden-voor-basisscholen — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/infectieziekten-bulletin/documenten/jaargang-7-nummer-12 — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/instructies-sequencing-SARS-CoV-2-uitbraak-BCO-reisonderzoek — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/kiemsurveillance-instructies-deelnemende-laboratoria — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/landelijk-meetnet-effecten-mestbeleid/onderzoeksresultaten/aan%20LMM%20gerelateerde%20rapporten — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/legionella/draaiboek/bijlage-indeling-waterinstallaties — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/media/114611 — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/monitor-langer-thuis/resultaten-2019/dashboard-monitor-langer-thuis-2019 — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/omt77-bijlage-mondneusmaskers — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/pm10bgcorrgcn2019 — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- https://www.rivm.nl/tekenpas — 1 render-blocking <script> in <head> (add defer/async or use type=module)
warning robots.txt blocks CSS/JS the pages need to render
Rule robots.blocks_css_js · Robots · 1 occurrence(s)
- https://www.rivm.nl/ — robots.txt Disallow blocks render-critical CSS/JS under: /themes/custom/bootstrap_rijkshuisstijl/js/ — Google's renderer can't fetch these, so the affected pages may render blank or thin. Allow the asset path(s) for Googlebot.
warning Title likely truncated in SERP (too wide)
Rule title.too_long · Titles · 11 occurrence(s)
- https://www.rivm.nl/documenten/notitie-ruwe-schets-van-problemen-voor-behandeling-van-nederlandse-patienten-bij — 159 chars, ~1224px (limit ~580px)
- https://www.rivm.nl/factsheet-determinanten — 76 chars, ~598px (limit ~580px)
- https://www.rivm.nl/gedragsonderzoek/sociovax/sociovaxprojectoproep — 73 chars, ~597px (limit ~580px)
- https://www.rivm.nl/inventory-of-worldwide-availability-of-flavour-accessories-november-2023 — 80 chars, ~592px (limit ~580px)
- https://www.rivm.nl/landelijk-meetnet-effecten-mestbeleid/informatie-voor-deelnemers/vraag-en-antwoord/wat-kunt-u-wel-en-niet-met-resultaten-van-bemonstering-op-uw-bedrijf — 82 chars, ~628px (limit ~580px)
- https://www.rivm.nl/omt77-bijlage-mondneusmaskers — 74 chars, ~631px (limit ~580px)
- https://www.rivm.nl/regionale-infectieziektebestrijding/regionale-arts-consulenten-rec/praatplaat-rac — 127 chars, ~970px (limit ~580px)
- https://www.rivm.nl/tuberculose/professionals/procedure-projecten-tuberculosebestrijding/projectaanvraagformulier — 78 chars, ~595px (limit ~580px)
- https://www.rivm.nl/weblog/gedwongen-opnames-voor-tuberculose-in-nederland-2000-2019/IB-11-2020 — 78 chars, ~637px (limit ~580px)
- https://www.rivm.nl/weblog/ib/snelle-en-doeltreffende-uitbraakrespons-door-sterk-ggd-netwerk/IB-03-2026 — 77 chars, ~606px (limit ~580px)
- https://www.rivm.nl/windenergie/literatuur-windturbines-en-gezondheid-Q4-2022 — 112 chars, ~871px (limit ~580px)
warning Double slash in URL path (duplicate-content risk)
Rule url.double_slash · URL · 1 occurrence(s)
Notices (15 rules)
notice Heading levels skip a level
Rule agent.heading_skip · Agent Readiness · 14 occurrence(s)
- https://www.rivm.nl/bevolkingsonderzoek-baarmoederhalskanker/eenvoudige-uitleg — h3 follows h1 — skips h2
- https://www.rivm.nl/coronavirus-covid-19/omt/omt-80 — h5 follows h2 — skips h3
- https://www.rivm.nl/documenten/infectieziekten-bulletin/jaargang-18-nummer-1 — h3 follows h1 — skips h2
- https://www.rivm.nl/en/documenten/review-of-hpv-vaccination-in-netherlands — h3 follows h1 — skips h2
- https://www.rivm.nl/en/throughoutthelifecourse — h3 follows h1 — skips h2
- https://www.rivm.nl/hitte/documenten/infographic-nationaal-hitteplan-code-geel — h3 follows h1 — skips h2
- https://www.rivm.nl/infectieziekten-bulletin/documenten/jaargang-7-nummer-12 — h3 follows h1 — skips h2
- https://www.rivm.nl/landelijk-meetnet-effecten-mestbeleid/informatie-voor-deelnemers/vraag-en-antwoord/wat-kunt-u-wel-en-niet-met-resultaten-van-bemonstering-op-uw-bedrijf — h3 follows h1 — skips h2
- https://www.rivm.nl/landelijk-meetnet-effecten-mestbeleid/onderzoeksresultaten/aan%20LMM%20gerelateerde%20rapporten — h3 follows h1 — skips h2
- https://www.rivm.nl/publicaties/monitor-onbedoelde-tiener-zwangerschappen-cijferoverzicht-2022 — h3 follows h1 — skips h2
- https://www.rivm.nl/regionale-infectieziektebestrijding/regionale-arts-consulenten-rec/praatplaat-rac — h3 follows h1 — skips h2
- https://www.rivm.nl/tekenpas — h3 follows h1 — skips h2
- https://www.rivm.nl/voedselcontactmaterialen/documenten/reglement-cbvv — h3 follows h1 — skips h2
- https://www.rivm.nl/weblog/gedwongen-opnames-voor-tuberculose-in-nederland-2000-2019/IB-11-2020 — h6 follows h3 — skips h4
notice No llms.txt for AI agents
Rule agent.llms_txt_missing · Agent Readiness · 1 occurrence(s)
- https://www.rivm.nl/ — no llms.txt found at the site root — add one so AI agents get a curated site summary
notice Main text is hard to read (low Flesch Reading Ease)
Rule content.readability_poor · Content · 3 occurrence(s)
- https://www.rivm.nl/en/documenten/lchv/reiniging-seksbedrijven-EN — this page reads as very difficult (Flesch Reading Ease 6, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
- https://www.rivm.nl/en/documenten/review-of-hpv-vaccination-in-netherlands — this page reads as very difficult (Flesch Reading Ease 28, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
- https://www.rivm.nl/en/throughoutthelifecourse — this page reads as difficult (Flesch Reading Ease 33, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
notice Image alt text is keyword-stuffed (repetition / low variety)
Rule images.alt_stuffed · Images · 1 occurrence(s)
- https://www.rivm.nl/weblog/gesignaleerd-IB-12-2020 — 4 image(s) have keyword-stuffed alt text — the same word repeated several times, or a long low-variety keyword list. Google's image guidance asks for short, descriptive alt text, not keyword lists; rewrite it to describe the image.
notice Image alt text is very long (possible keyword stuffing)
Rule images.alt_too_long · Images · 2 occurrence(s)
- https://www.rivm.nl/weblog/gesignaleerd-IB-12-2020 — 6 image(s) with alt text over 100 chars — shorten it to a concise description
- https://www.rivm.nl/weblog/ib/snelle-en-doeltreffende-uitbraakrespons-door-sterk-ggd-netwerk/IB-03-2026 — 1 image(s) with alt text over 100 chars — shorten it to a concise description
notice Likely hero image lacks fetchpriority=high
Rule images.hero_no_fetchpriority · Performance · 48 occurrence(s)
- https://www.rivm.nl/ — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/2019%20emissiefactoren%20EC%20voor%20snelwegen%20en%20niet%20snelwegen — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/2019%20emissiefactoren%20voor%20snelwegen%20en%20niet%20snelwegen — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/bevolkingsonderzoek-baarmoederhalskanker/eenvoudige-uitleg — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/coronavirus-covid-19/omt/omt-80 — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/cpt/kwaliteit-wet-en-regelgeving/kwaliteit/protocol_visitaties_tbc — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/documenten/infectieziekten-bulletin/jaargang-18-nummer-1 — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/documenten/notitie-ruwe-schets-van-problemen-voor-behandeling-van-nederlandse-patienten-bij — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/en/documenten/lchv/reiniging-seksbedrijven-EN — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/en/documenten/review-of-hpv-vaccination-in-netherlands — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/en/throughoutthelifecourse — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/factsheet-determinanten — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/factsheet-thuiswonende-ouderen-tijdens-COVID-19 — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/hitte/documenten/infographic-nationaal-hitteplan-code-geel — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/hygienerichtlijnen/basisscholen/informatie-over-ziektebeelden-voor-basisscholen — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/infectieziekten-bulletin/documenten/jaargang-7-nummer-12 — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/instructies-sequencing-SARS-CoV-2-uitbraak-BCO-reisonderzoek — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/kiemsurveillance-instructies-deelnemende-laboratoria — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/landelijk-meetnet-effecten-mestbeleid/onderzoeksresultaten/aan%20LMM%20gerelateerde%20rapporten — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/legionella/draaiboek/bijlage-indeling-waterinstallaties — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/media/114611 — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/monitor-langer-thuis/resultaten-2019/dashboard-monitor-langer-thuis-2019 — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/omt77-bijlage-mondneusmaskers — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/pm10bgcorrgcn2019 — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- https://www.rivm.nl/tekenpas — the likely hero/LCP image (logo.svg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
notice Meta description too long
Rule meta_desc.too_long · Meta Description · 5 occurrence(s)
- https://www.rivm.nl/IB/sociaalwetenschappelijk-onderzoek-naar-vaccineren-SocioVax-IB0325 — 336 chars
- https://www.rivm.nl/IB/weblog/nieuw-in-nederland-rsv-immunisatie-voor-zuigelingen-IB1025 — 455 chars
- https://www.rivm.nl/profiel/redactie-infectieziekten-bulletin — 309 chars
- https://www.rivm.nl/weblog/gedwongen-opnames-voor-tuberculose-in-nederland-2000-2019/IB-11-2020 — 287 chars
- https://www.rivm.nl/weblog/ib/snelle-en-doeltreffende-uitbraakrespons-door-sterk-ggd-netwerk/IB-03-2026 — 500 chars
notice Missing Open Graph tags
Rule og.missing · Social · 48 occurrence(s)
- https://www.rivm.nl/ — og:title, og:description, og:image
- https://www.rivm.nl/2019%20emissiefactoren%20EC%20voor%20snelwegen%20en%20niet%20snelwegen — og:title, og:description, og:image
- https://www.rivm.nl/2019%20emissiefactoren%20voor%20snelwegen%20en%20niet%20snelwegen — og:title, og:description, og:image
- https://www.rivm.nl/bevolkingsonderzoek-baarmoederhalskanker/eenvoudige-uitleg — og:title, og:description, og:image
- https://www.rivm.nl/coronavirus-covid-19/omt/omt-80 — og:title, og:description, og:image
- https://www.rivm.nl/cpt/kwaliteit-wet-en-regelgeving/kwaliteit/protocol_visitaties_tbc — og:title, og:description, og:image
- https://www.rivm.nl/documenten/infectieziekten-bulletin/jaargang-18-nummer-1 — og:title, og:description, og:image
- https://www.rivm.nl/documenten/notitie-ruwe-schets-van-problemen-voor-behandeling-van-nederlandse-patienten-bij — og:title, og:description, og:image
- https://www.rivm.nl/en/documenten/lchv/reiniging-seksbedrijven-EN — og:title, og:description, og:image
- https://www.rivm.nl/en/documenten/review-of-hpv-vaccination-in-netherlands — og:title, og:description, og:image
- https://www.rivm.nl/en/throughoutthelifecourse — og:title, og:description, og:image
- https://www.rivm.nl/factsheet-determinanten — og:title, og:description, og:image
- https://www.rivm.nl/factsheet-thuiswonende-ouderen-tijdens-COVID-19 — og:title, og:description, og:image
- https://www.rivm.nl/hitte/documenten/infographic-nationaal-hitteplan-code-geel — og:title, og:description, og:image
- https://www.rivm.nl/hygienerichtlijnen/basisscholen/informatie-over-ziektebeelden-voor-basisscholen — og:title, og:description, og:image
- https://www.rivm.nl/infectieziekten-bulletin/documenten/jaargang-7-nummer-12 — og:title, og:description, og:image
- https://www.rivm.nl/instructies-sequencing-SARS-CoV-2-uitbraak-BCO-reisonderzoek — og:title, og:description, og:image
- https://www.rivm.nl/kiemsurveillance-instructies-deelnemende-laboratoria — og:title, og:description, og:image
- https://www.rivm.nl/landelijk-meetnet-effecten-mestbeleid/onderzoeksresultaten/aan%20LMM%20gerelateerde%20rapporten — og:title, og:description, og:image
- https://www.rivm.nl/legionella/draaiboek/bijlage-indeling-waterinstallaties — og:title, og:description, og:image
- https://www.rivm.nl/media/114611 — og:title, og:description, og:image
- https://www.rivm.nl/monitor-langer-thuis/resultaten-2019/dashboard-monitor-langer-thuis-2019 — og:title, og:description, og:image
- https://www.rivm.nl/omt77-bijlage-mondneusmaskers — og:title, og:description, og:image
- https://www.rivm.nl/pm10bgcorrgcn2019 — og:title, og:description, og:image
- https://www.rivm.nl/tekenpas — og:title, og:description, og:image
notice Legacy image format (jpg/png/gif) with no next-gen fallback
Rule perf.images_legacy_format · Performance · 7 occurrence(s)
- https://www.rivm.nl/ — 6 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- https://www.rivm.nl/IB/sociaalwetenschappelijk-onderzoek-naar-vaccineren-SocioVax-IB0325 — 1 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- https://www.rivm.nl/IB/weblog/nieuw-in-nederland-rsv-immunisatie-voor-zuigelingen-IB1025 — 6 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- https://www.rivm.nl/en/throughoutthelifecourse — 1 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- https://www.rivm.nl/weblog/gedwongen-opnames-voor-tuberculose-in-nederland-2000-2019/IB-11-2020 — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- https://www.rivm.nl/weblog/gesignaleerd-IB-12-2020 — 8 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- https://www.rivm.nl/weblog/ib/snelle-en-doeltreffende-uitbraakrespons-door-sterk-ggd-netwerk/IB-03-2026 — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
notice URL redirects to another URL
Rule redirect.single · Crawlability · 1 occurrence(s)
- https://www.rivm.nl/https://www.rivm.nl/documenten/factsheet-gli-monitor-tweede — redirects to https://www.rivm.nl/https:/www.rivm.nl/documenten/factsheet-gli-monitor-tweede
notice target=_blank link without rel=noopener (tab-napping)
Rule security.unsafe_cross_origin_links · Security · 7 occurrence(s)
- https://www.rivm.nl/ — 1 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- https://www.rivm.nl/IB/sociaalwetenschappelijk-onderzoek-naar-vaccineren-SocioVax-IB0325 — 1 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- https://www.rivm.nl/IB/weblog/nieuw-in-nederland-rsv-immunisatie-voor-zuigelingen-IB1025 — 2 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- https://www.rivm.nl/profiel/redactie-infectieziekten-bulletin — 1 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- https://www.rivm.nl/weblog/gedwongen-opnames-voor-tuberculose-in-nederland-2000-2019/IB-11-2020 — 1 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- https://www.rivm.nl/weblog/gesignaleerd-IB-12-2020 — 1 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- https://www.rivm.nl/weblog/ib/snelle-en-doeltreffende-uitbraakrespons-door-sterk-ggd-netwerk/IB-03-2026 — 1 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
notice Indexable page not listed in sitemap
Rule sitemap.orphan_not_listed · Sitemap · 1 occurrence(s)
- https://www.rivm.nl/ — indexable but not in sitemap
notice URL is very long
Rule url.too_long · URL · 1 occurrence(s)
notice Underscores in URL path (prefer hyphens)
Rule url.underscores · URL · 1 occurrence(s)
notice Uppercase letters in URL path
Rule url.uppercase · URL · 11 occurrence(s)
- https://www.rivm.nl/2019%20emissiefactoren%20EC%20voor%20snelwegen%20en%20niet%20snelwegen
- https://www.rivm.nl/IB/sociaalwetenschappelijk-onderzoek-naar-vaccineren-SocioVax-IB0325
- https://www.rivm.nl/IB/weblog/nieuw-in-nederland-rsv-immunisatie-voor-zuigelingen-IB1025
- https://www.rivm.nl/en/documenten/lchv/reiniging-seksbedrijven-EN
- https://www.rivm.nl/factsheet-thuiswonende-ouderen-tijdens-COVID-19
- https://www.rivm.nl/instructies-sequencing-SARS-CoV-2-uitbraak-BCO-reisonderzoek
- https://www.rivm.nl/landelijk-meetnet-effecten-mestbeleid/onderzoeksresultaten/aan%20LMM%20gerelateerde%20rapporten
- https://www.rivm.nl/weblog/gedwongen-opnames-voor-tuberculose-in-nederland-2000-2019/IB-11-2020
- https://www.rivm.nl/weblog/gesignaleerd-IB-12-2020
- https://www.rivm.nl/weblog/ib/snelle-en-doeltreffende-uitbraakrespons-door-sterk-ggd-netwerk/IB-03-2026
- https://www.rivm.nl/windenergie/literatuur-windturbines-en-gezondheid-Q4-2022
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