The Environment Agency / DEFRA - [[https://www.gov.uk/guidance/surface-water-pollution-risk-assessment-for-your-environmental-permit|Surface Water Pollution Risk for Your Environment Permit]] has two interesting sheets embedded within it - 

[[https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1000956/Estuaries_and_coastal_waters_specific_pollutants_and_operational_environmental_quality_standards.ods|Estuaries and coastal water specific pollutant and operation environmental quality standards]] - [[Estuaries and coastal water - pollutants and EQS]]

and

[[https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1057292/Estuaries_and_coastal_waters_priority_hazardous_substances__priority_substances_and_other_pollutants_environmental_quality_standards__2_.ods|Estuaries and coastal water priority hazardous substances priority substances and other pollutants environmental quality standards]] - [[Estuaries and coastal water - hazardous substances and EQS]]



[[CEFAS - Action Levels]]