SIC code 4100 — Collection, purification and distribution of water — is a UK Standard Industrial Classification code. It falls under Section E (Electricity, gas and water supply) of the UK SIC 2007 classification system.
SIC code 4100 stands for "Collection, purification and distribution of water" under the UK Standard Industrial Classification (SIC 2007) system. It belongs to Section E — Electricity, gas and water supply. Companies use this code when registering with Companies House to indicate their primary business activity.
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Data sourced from Companies House, HM Land Registry, FCA Register, and 50+ government databases. SIC classification follows the UK Standard Industrial Classification of Economic Activities 2007 (SIC 2007). Last updated: 2026-04-05.