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pollution of controlled waters meaning

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What does pollution of controlled waters mean?
In practice, this describes the entry of harmful substances into legally defined water bodies (“controlled waters”), including surface waters, coastal/territorial waters and groundwater. It commonly arises in prosecutions and permitting under environmental law, contaminated land assessments, and remediation obligations. The term is statutory. In England and Wales, and for Part IIA of the Environmental Protection Act 1990, “pollution of controlled waters” means the entry into controlled waters of any poisonous, noxious or polluting matter, or any solid waste matter. Historically linked to offences under the Water Resources Act 1991, the operative criminal and permitting framework now largely sits under the Environmental Permitting (England and Wales) Regulations 2016 (water discharge and groundwater activities). Usage across the UK and Ireland is broadly consistent in substance but differs in wording and scheme: - Scotland principally regulates the “water environment” under the Water Environment and Water Services (Scotland) Act 2003 and the Controlled Activities Regulations, rather than using “controlled waters”. - Northern Ireland addresses water pollution under the Water (Northern Ireland) Order 1999. - Ireland regulates discharges to “waters” under the Local Government (Water Pollution) Acts 1977–1990. Practically, liability and regulatory action often turn on whether any such matter entered controlled waters and whether appropriate authorisation or defences apply.
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View the related Practice Notes about pollution of controlled waters

PRACTICE NOTES
Water pollution liabilities and enforcement in England and Wales: offences, permitting, agricultural controls, nuisance claims, penalties and remediation, including corporate and officer liability

Water pollution Polluted water can kill fish and other aquatic life, harm habitats, threaten drinking supplies, lower water quality and foul beaches. Many kinds of contaminant can enter waters—chemicals, microplastics, petrol, oils and fats, ammonia in sewage, mine waste, nitrates from farming and solid waste. Definitions of water ‘Controlled waters’ Relevant territorial waters (seawater to three nautical miles) Coastal waters (eg tidal waters) Inland freshwaters (rivers, streams, watercourses, lakes and ponds) Groundwaters (water stored in rock layers beneath soil) Section 104 of the Water Resources Act 1991 (WRA 1991) ‘Surface water’ Inland waters (all standing or flowing surface water, except groundwater) Transitional waters (partly saline estuaries substantially influenced by freshwater flows) Coastal waters (water up to one mile seaward) The Water Environment (Water Framework Directive) (England and Wales) Regulations 2017, SI 2017/407, Sch 1 ‘Groundwater’ — all water below the ground surface...

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PRACTICE NOTES
England and Wales 2026 contamination, pollution and environmental permitting—legislation and consultations tracker (from 1 January 2026)

This tracker tool tracks and summarises key new legislation and consultations in England and Wales linked to contamination, pollution and environmental permitting. In England and Wales, the following regimes govern contamination, pollution and environmental permitting: Contaminated land regime under Part IIA of the Environmental Protection Act 1990 (EPA 1990): addresses land contamination that is causing, or where there is a significant possibility of causing, significant harm to human health (including property), living organisms, interference with ecological systems, or impacts on controlled waters. The Environmental Damage (Prevention and Remediation) (England) Regulations 2015, SI 2015/810, and the Environmental Damage (Prevention and Remediation) (Wales) Regulations 2009, SI 2009/995 (EDR): apply to environmental damage, defined as damage to: a protected species or natural habitat that has a significant adverse effect on achieving or maintaining the favourable conservation status of that species or habitat a site of special scientific interest (SSSI) where the integrity of the site is adversely affected surface water...

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PRACTICE NOTES
England and Wales 2025 environmental law tracker: contamination, pollution and permitting—legislation and consultations (Archived)

ARCHIVED This Practice Note has been archived and is no longer maintained. This tracker compiles and summarises key recent and forthcoming legislation and consultations in England and Wales connected to contamination, pollution and environmental permitting. In England and Wales, the following regimes relate to contamination, pollution and permitting: the contaminated land regime under Part IIA of the Environmental Protection Act 1990 (EPA 1990): this addresses contamination of land that is causing, or where there is a significant likelihood of causing, significant harm to human health (including property), living organisms, or interference with ecological systems, or to controlled waters the Environmental Damage (Prevention and Remediation) (England) Regulations 2015, SI 2015/810 and the Environmental Damage (Prevention and Remediation) (Wales) Regulations 2009, SI 2009/995 (EDR): these apply to environmental damage, defined as environmental damage to: a protected species or natural habitat that has a significant adverse effect on achieving or maintaining the favourable conservation status of that species or habitat a...

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