Water collection, treatment and supply (SIC code 36000)
Water collection, treatment and supply is UK SIC code 36000. It sits in division 36 (Water collection, treatment and supply) of the SIC 2007 list. On the August 2026 Companies House register, 1,660 active UK companies list 36000 among their SIC codes. 1,501 of them list it first.
1,660active UK companies list SIC 36000 among their codes on the public recordCompanies House · counts as of August 2026
SIC 36000 in numbers
1,660 companies is 0.03 per cent of the 5,190,464 active companies on the UK register. It is the only code we track in division 36.
1,501 of the 1,660 put 36000 first, and only 159 carry it as a second, third or fourth code. The code on its own is a clean filter.
ACTIVE COMPANIES BY REGISTERED-OFFICE POST TOWN (WHERE THE PAPERWORK SITS, NOT NECESSARILY THE WORK) · COMPANIES HOUSE PUBLIC RECORD, AUGUST 2026
London is the largest cluster at 14 per cent and the top five post towns hold 21 per cent, so the other 79 per cent sit across the rest of the country. A regional filter narrows the list without gutting it.
A worked example: 36000, registered office in London, incorporated in the last ninety days, from a pool of 1,660. Each lead you get arrives with a working website and a real email, and the director's name when the record has one. If we cannot complete one, you pay nothing.
SIC 36000 companies, as leads
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A single code division, 36000, and a surprisingly large one given that UK water supply is dominated by a small number of regional monopolies.
How to read SIC 36000
SIC 36000 reads as division 36 (water collection, treatment and supply), group 360, class 3600, then the full five digits, inside section E, water supply, sewerage and waste management. A company picks its own codes, up to four, and Companies House does not check them, so 36000 is the company's own description of what it does, and 1,501 list it first where 1,660 list it anywhere.
Who sells into division 36
Selling into this division means selling either to the utilities themselves, which is a long procurement cycle, or to the far more numerous corporate entities around them.
About SIC 36000
How many UK companies use SIC code 36000?
1,660 active UK companies list 36000 (Water collection, treatment and supply) among their registered SIC codes. Each company may register up to four. Of those, 1,501 put it first. The figures come from the August 2026 Companies House register snapshot, and count active companies only.
Why are there over a thousand companies in water supply?
Because the public record counts legal entities, not utilities. A single water company typically sits inside a group with holding companies, financing subsidiaries and service entities, and the retail market has added further licensed suppliers. The operational businesses are a small fraction of the count.
Put SIC 36000 to work
Find UK SIC 36000 companies
Filter Companies House by this code. Each lead arrives with a working website and a real email, or you pay nothing. 100 free leads, no card.
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