Castle Water vs Water Plus:Which is more popular?
In September 2026, Water Plus had more branded searches than Castle Water among business water suppliers in the United Kingdom. Water Plus had about 27,100 branded searches, while Castle Water had 18,100. Water Plus made up 42.5% of all business water supplier searches we track, and Castle Water accounted for 28.4%. When we asked ChatGPT and Google AI Overviews about business water suppliers, Castle Water appeared in three of the five answers and Water Plus in two. Castle Water was mentioned before Water Plus in two out of three answers that named either.
Who do people search for more?
Water Plus, about 50% more searches than Castle Water
Who does AI mention more?
Castle Water, mentioned in 3 of 5 answers, Water Plus in 2
Who does AI recommend more?
Castle Water, named ahead of Water Plus in 2 of 3 answers
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Top business water suppliers in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Castle Water was mentioned in three out of five: in one of the three ChatGPT answers and in both Google AI Overviews. Water Plus was mentioned in two out of five: in one of the three ChatGPT answers and in one of the two Google AI Overviews. Castle Water was listed before Water Plus in two out of three answers that named either.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- Castle Water3 of 5Named in 1 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Water Plus2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
Business Stream2 of 5Named in 0 of 3 ChatGPT answersNamed in 2 of 2 Google answers
Wave2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Everflow2 of 5Named in 0 of 3 ChatGPT answersNamed in 2 of 2 Google answers- Source for Business2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Waterscan0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about business water suppliers
5 answers
Asked ChatGPT
“What's the best business water supplier in the UK?”
Asked ChatGPT
“Can a small business switch water supplier in England, and is it worth it?”
Asked ChatGPT
“Which business water retailers have the best customer service?”
Searched Google, AI Overview
“business water suppliers”
Searched Google, AI Overview
“business water”
Not named in any answer:
Brands are shown in the order each answer named them. The survey took place in United Kingdom on October 28, 2026.
Is Castle Water or Water Plus more popular in search?
This chart shows how often people search Google for Castle Water and Water Plus by name. Each line represents a brand's share of searches for all seven business water suppliers we track, month by month, from searches in United Kingdom.
Share of searches by month for Water Plus, Castle Water. The figures are in the table below the chart.
View monthly share of searches table
| Month | Water Plus | Castle Water | Business Stream | Wave | Everflow | Source for Business | Waterscan |
|---|---|---|---|---|---|---|---|
| Oct 2025 | 42.3% | 28.3% | 18.9% | 5.6% | 2% | 2.5% | 0.33% |
| Nov 2025 | 44.1% | 29.4% | 16.1% | 5.9% | 2.1% | 2.1% | 0.34% |
| Dec 2025 | 43.1% | 28.8% | 19.2% | 4.7% | 1.9% | 1.9% | 0.33% |
| Jan 2026 | 42.3% | 28.3% | 18.9% | 5.6% | 2% | 2.5% | 0.41% |
| Feb 2026 | 42.3% | 28.3% | 18.9% | 5.6% | 2% | 2.5% | 0.41% |
| Mar 2026 | 42.9% | 28.7% | 19.2% | 4.7% | 2.1% | 2.1% | 0.41% |
| Apr 2026 | 42.8% | 28.6% | 19.1% | 4.6% | 2.1% | 2.5% | 0.33% |
| May 2026 | 43% | 28.7% | 19.2% | 4.6% | 2.1% | 2.1% | 0.33% |
| Jun 2026 | 42.6% | 28.4% | 19% | 4.6% | 2.5% | 2.5% | 0.41% |
| Jul 2026 | 42.6% | 28.4% | 19% | 4.6% | 2.5% | 2.5% | 0.41% |
| Aug 2026 | 40.4% | 27% | 22% | 4.4% | 2.9% | 2.9% | 0.38% |
| Sep 2026 | 42.5% | 28.4% | 19% | 4.6% | 2.5% | 2.5% | 0.5% |
How has the Castle Water and Water Plus comparison changed over the last 12 months?
3 findings
- Water Plus was ahead of Castle Water in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Castle Water’s share of searches among business water suppliers in the United Kingdom moved from 28.3% to 28.4%, and its estimated monthly branded searches held steady at 18.1K.
- Across the 12 months ending September 2026, Water Plus’ share of searches among business water suppliers in the United Kingdom moved from 42.3% to 42.5%, and its estimated monthly branded searches held steady at 27.1K.
How did search popularity change for United Kingdom business water suppliers in September 2026?
2 changes
In September 2026, Water Plus gained share of searches among business water suppliers in the United Kingdom, from 40.4% to 42.5%.
In September 2026, Castle Water gained share of searches among business water suppliers in the United Kingdom, from 27% to 28.4%.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using Castle Water’s and Water Plus’ names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
Castle Water
1 branded search term
- castle water
Water Plus
1 branded search term
- water plus
Other head-to-heads among business water suppliers
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