A water quality consultant advises developers, landowners and regulators on the impact of development on water bodies, watercourses and groundwater. They prepare Water Framework Directive (WFD) assessments, water quality impact assessments, Environmental Permit applications and discharge consent submissions for the Environment Agency. They often work alongside hydrologists and flood risk engineers on complex catchment-level projects.
What they do
- Prepare Water Framework Directive compliance assessments
- Assess impacts on SSSI units with hydrological interest
- Prepare Environmental Permit applications for discharge to controlled waters
- Advise on groundwater Source Protection Zone (SPZ) constraints
- Carry out surface water quality surveys and baseline monitoring
- Assess impacts from dewatering, runoff, contamination and sedimentation
- Advise on abstraction licence applications and water resource management
- Write water quality chapters for Environmental Statements
When you need one
A water quality consultant is needed when development could affect rivers, streams, lakes, groundwater or coastal waters, or when regulatory consents are required for water discharges.
Typical costs (UK, 2025)
| Job type | Typical cost |
|---|---|
| Preliminary water quality screening report | £2,000 - £5,000 |
| WFD compliance assessment | £4,000 - £15,000 |
| Environmental Permit application (discharge consent) | £3,000 - £10,000 |
| SSSI hydrological assessment | £5,000 - £20,000 |
| Water quality ES chapter | £5,000 - £20,000 |
| Hourly rate | £65 - £120 / hr |
Baseline water quality monitoring (sampling and lab analysis) is typically additional to consultancy fees. Environment Agency permitting fees also apply and vary by permit type.
Qualifications to look for
Chartered membership of the Chartered Institution of Water and Environmental Management (CIWEM) is the primary professional standard for water quality specialists. It requires a relevant degree, at least three years of experience, and a professional review. Check membership at ciwem.org.
Chartered Environmentalist status awarded through licensed bodies including CIWEM and IEMA. Demonstrates broad environmental competence alongside the specific water quality expertise of C.WEM.
How to find a reputable water quality consultant
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What is a Water Framework Directive assessment?
A Water Framework Directive (WFD) assessment evaluates whether a development proposal could cause deterioration in the ecological or chemical status of a water body under the Water Framework Directive (retained as UK law post-Brexit). The Environment Agency requires WFD assessments for developments that could affect rivers, lakes, estuaries, coastal waters or groundwater bodies. The assessment must demonstrate that the project will not prevent a water body from achieving Good Ecological Status.
When do I need a water quality consultant?
You need a water quality consultant when your development may affect water bodies, watercourses or groundwater. This includes developments near rivers or streams, sites with discharge to watercourses, developments on Source Protection Zones, sites requiring Environmental Permits or discharge consents, developments affecting SSSIs with hydrological interest, and any project requiring a WFD compliance assessment as part of an Environmental Statement.
What qualifications should a water quality consultant have?
Look for membership of the Chartered Institution of Water and Environmental Management (CIWEM), ideally at Chartered status (C.WEM). Chartered Environmentalist (CEnv) status through IEMA is also common. Some consultants hold additional qualifications in analytical chemistry or ecology relevant to their specialism. Always confirm Professional Indemnity Insurance appropriate to the project scale.