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  <!-- ===== HOMEPAGE ===== -->
  <url>
    <loc>https://filterauthority.co.uk/</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>weekly</changefreq>
    <priority>1.0</priority>
  </url>

  <!-- ===== CORE PAGES ===== -->
  <url>
    <loc>https://filterauthority.co.uk/about</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/contact</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.6</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/methodology</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/how-we-verify</loc>
    <lastmod>2026-02-12</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/resources</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.6</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/before-you-buy</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/marketing-claims-checklist</loc>
    <lastmod>2026-01-20</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>

  <!-- ===== MONEY PAGES (Buyer's Guides & Comparisons) ===== -->
  <url>
    <loc>https://filterauthority.co.uk/best-water-filters-uk-2025</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/comparison</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/waterdrop-vs-ispring</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/baby-formula-water-safety</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/best-pfas-filters-uk</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/best-microplastics-filters-uk</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/best-hard-water-filters-uk</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/best-chlorine-taste-filters-uk</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/best-water-filters-renters-uk</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/best-water-filters-students-uk</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- ===== TOOLS & INTERACTIVE PAGES ===== -->
  <url>
    <loc>https://filterauthority.co.uk/filter-finder</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/filter-assistant</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/water-quality-lookup</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- ===== GUIDE PAGES ===== -->
  <url>
    <loc>https://filterauthority.co.uk/water-filtration-101</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/filter-types-explained</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <!-- Removed from sitemap: /filter-types-guide (duplicate of /filter-types-explained) -->
  <url>
    <loc>https://filterauthority.co.uk/tds-meter-guide</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/maintenance-guide</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/how-often-change-water-filter</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/nsf-certification-explained</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/water-filters-tea-coffee</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/signs-filter-stopped-working</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/water-filters-seniors</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/is-uk-tap-water-safe-to-drink</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/lead-pipes-uk-how-to-check</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <!-- Removed: /pfas-uk-water now 301 redirects to /pfas-guide -->
  <url>
    <loc>https://filterauthority.co.uk/pfas-guide</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/hard-water-guide</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/well-water-guide</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/whole-house-water-filters</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <!-- Removed from sitemap: /off-grid-well-water (niche for UK audience) -->
  <url>
    <loc>https://filterauthority.co.uk/travel-water-filters-uk</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <!-- Removed from sitemap: /northern-ireland-delivery (thin content, niche) -->
  <url>
    <loc>https://filterauthority.co.uk/water-filters-soft-water</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/water-filters-london</loc>
    <lastmod>2026-04-02</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
  </url>

  <!-- ===== CITY PAGES ===== -->
  <url>
    <loc>https://filterauthority.co.uk/water-filters-london-city</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/water-filters-manchester</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/water-filters-birmingham</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/water-filters-edinburgh</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/water-filters-glasgow</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/water-filters-leeds</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/water-filters-bristol</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/water-filters-liverpool</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/water-filters-cardiff</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>

  <!-- ===== BLOG LISTING ===== -->
  <url>
    <loc>https://filterauthority.co.uk/blog</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- ===== BLOG POSTS (Canonical URLs only — one URL per article) ===== -->

  <!-- Lead in Water cluster -->
  <url>
    <loc>https://filterauthority.co.uk/blog/best-water-filters-lead-removal-uk</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/is-there-lead-in-my-water</loc>
    <lastmod>2026-02-01</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/do-brita-filters-remove-lead</loc>
    <lastmod>2026-02-01</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- Baby & Family Safety cluster -->
  <url>
    <loc>https://filterauthority.co.uk/blog/water-filters-safe-for-babies</loc>
    <lastmod>2026-02-01</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <!-- Removed from sitemap: /blog/perimenopause-water-quality (niche, low search volume) -->

  <!-- PFAS & Forever Chemicals cluster -->
  <!-- Removed: /blog/pfas-forever-chemicals now 301 redirects to /pfas-guide -->
  <url>
    <loc>https://filterauthority.co.uk/blog/do-water-filters-remove-pfas</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <!-- Removed from sitemap: /blog/is-teflon-making-you-sick-pfas-nonstick-pans (tangential) -->
  <!-- Removed from sitemap: /blog/cooking-without-chemicals (tangential) -->

  <!-- Microplastics cluster -->
  <url>
    <loc>https://filterauthority.co.uk/blog/microplastics-heart-surgery</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/microplastics-kitchen-guide</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>

  <!-- UK Water Quality & News cluster -->
  <url>
    <loc>https://filterauthority.co.uk/blog/thames-water-fine</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/water-bills-increase-2026</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/uk-water-crises-history</loc>
    <lastmod>2026-01-18</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/who-owns-uk-water-companies</loc>
    <lastmod>2026-01-19</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/tap-water-tastes-like-chlorine</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/does-boiling-water-remove-chlorine</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/how-to-test-tap-water-uk</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <!-- Removed from sitemap: /blog/rural-ni-well-water (very niche) -->
  <url>
    <loc>https://filterauthority.co.uk/blog/belfast-water-quality</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>

  <!-- City & Regional Guides cluster (blog posts) -->
  <!-- Removed: /blog/london-water-quality-guide now 301 redirects to /water-filters-london -->

  <!-- Buyer's Guides & Comparisons cluster -->
  <url>
    <loc>https://filterauthority.co.uk/blog/best-water-filters-renters-uk</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/best-hard-water-filters-uk-2026</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/reverse-osmosis-vs-carbon-filter</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/lifestraw-vs-grayl-vs-sawyer</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/waterdrop-vs-brita</loc>
    <lastmod>2026-02-01</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/ispring-vs-waterdrop-g3p600</loc>
    <lastmod>2026-02-11</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <!-- Removed from sitemap: /blog/ro-systems-and-water-meters (niche) -->

  <!-- Water Filtration Knowledge cluster -->
  <url>
    <loc>https://filterauthority.co.uk/blog/water-filter-certifications-nsf-wqa-explained</loc>
    <lastmod>2026-04-02</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/how-often-change-water-filter</loc>
    <lastmod>2026-01-17</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/history-of-water-filtration</loc>
    <lastmod>2026-01-18</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/survival-water-filtration-guide</loc>
    <lastmod>2026-01-18</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/water-filter-marketing-claims</loc>
    <lastmod>2026-01-20</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/complete-water-protection-guide</loc>
    <lastmod>2026-01-20</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.95</priority>
  </url>
  <url>
    <loc>https://filterauthority.co.uk/blog/tds-000-doesnt-mean-safe</loc>
    <lastmod>2026-01-20</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
</urlset>
