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Solutions
Clean WaterControl pathogens, biofilm and cost where conventional treatment failsAir & Infection ControlReduce airborne pathogens and infection risk, with no ozoneEnergyCut energy and recover it from the systems you already runAgriculture & SoilUse less water and fertiliser while protecting yield and soil
Sectors
Healthcare & HospitalsKeep patients safe and your accreditation secure, with infection, Legionella and AMR risk reducedWater & WastewaterStay in consent, and cut the energy and chemicals it takes to get thereCommercial & FacilitiesMeet your EPC and disclosure obligations while running cost and carbon fallAgriculture & Urban FarmingProtect your yield and soil while using less water and fertiliserLocal AuthoritiesMove your estate towards net zero with compliant assets, funded to saveEmerging MarketsBuild investable, accreditation-ready infrastructure on reliable water, sanitation and powerHotels, Hospitality & LeisureKeep guests safe and pools open, with Legionella risk controlled and pool-hall cost cutData CentresCut the cost and water your cooling burns, and harden Legionella control, without touching uptimeFood & Beverage ProcessingCut your trade-effluent bill and hold consent, without touching food safety or uptime
Tools
Where You'd Gain MostPick your sector and what is driving you, and see where you would gain and where to startTrade Effluent Bill EstimatorEstimate your annual trade-effluent bill and see how much is driven by strength, the part you can reduceWater Safety Risk ScorecardAnswer eight quick questions and see your indicative Legionella and waterborne risk band, and where to startCompliance Readiness CheckerPick the duty you answer to, from Legionella to net zero, and see your readiness band and the gaps to closeAeration Energy Cost CalculatorSize the annual energy, cost and carbon of aeration, the single largest energy load in wastewater treatmentCooling Tower Water & Cost CalculatorEstimate the annual water and chemical cost of a cooling tower, and the share that treatment can reduce
Solutions
Clean WaterControl pathogens, biofilm and cost where conventional treatment failsAir & Infection ControlReduce airborne pathogens and infection risk, with no ozoneEnergyCut energy and recover it from the systems you already runAgriculture & SoilUse less water and fertiliser while protecting yield and soil
Sectors
Healthcare & HospitalsKeep patients safe and your accreditation secure, with infection, Legionella and AMR risk reducedWater & WastewaterStay in consent, and cut the energy and chemicals it takes to get thereCommercial & FacilitiesMeet your EPC and disclosure obligations while running cost and carbon fallAgriculture & Urban FarmingProtect your yield and soil while using less water and fertiliserLocal AuthoritiesMove your estate towards net zero with compliant assets, funded to saveEmerging MarketsBuild investable, accreditation-ready infrastructure on reliable water, sanitation and powerHotels, Hospitality & LeisureKeep guests safe and pools open, with Legionella risk controlled and pool-hall cost cutData CentresCut the cost and water your cooling burns, and harden Legionella control, without touching uptimeFood & Beverage ProcessingCut your trade-effluent bill and hold consent, without touching food safety or uptime
Tools
Where You'd Gain MostPick your sector and what is driving you, and see where you would gain and where to startTrade Effluent Bill EstimatorEstimate your annual trade-effluent bill and see how much is driven by strength, the part you can reduceWater Safety Risk ScorecardAnswer eight quick questions and see your indicative Legionella and waterborne risk band, and where to startCompliance Readiness CheckerPick the duty you answer to, from Legionella to net zero, and see your readiness band and the gaps to closeAeration Energy Cost CalculatorSize the annual energy, cost and carbon of aeration, the single largest energy load in wastewater treatmentCooling Tower Water & Cost CalculatorEstimate the annual water and chemical cost of a cooling tower, and the share that treatment can reduce
Case StudiesInsightsAbout
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Integrated environmental solutions

Cleaner water, safer air, efficient energy.

One partner for your estate's environmental performance, every result independently proven.

From water and wastewater to air quality and energy, we improve the environmental performance of your whole estate. The result: lower cost, less risk, and every environmental obligation met.

Explore SolutionsView Case Studies

Independently verified, from pathogens cut to 0 cfu/g at a major UK airport to 34% less treatment energy.

Water & Wastewater

Stay in consent and protect your capacity, with cleaner discharge, lower treatment energy and fewer chemicals.

Explore

Air Quality & Infection Control

Protect the people in your buildings, with infection, Legionella and AMR risk brought under control across your estate.

Explore

Energy & Agriculture

Get more from every input, with less energy and water in, and more yield and resilience out.

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Our Commitment

Lower cost, less risk, every obligation met

HES assesses the built environment from every angle and recovers the assets it wastes, across water, energy and air, delivered as a single accountable platform of infrastructure, design and management, with deep engineering expertise behind it and every result proven independently.

About HES
01

Reduce

Take cost out of your estate. We cut energy, water, chemical and maintenance spend, often within the first weeks.

02

Protect

Keep risk off your balance sheet. We bring infection, pathogen, regulatory and asset risk under control before it reaches you.

03

Deliver

Meet what you are required to achieve. We deliver on your ESG, net zero, compliance and accreditation obligations, with evidence.

04

Integrate

Carry none of the complexity. We bring every capability together as one partner.

Evidence

Independently measured, never merely claimed.

0 cfu/gRecurring waterborne pathogens eliminated in four days at a major UK airport, confirmed by an accredited laboratory
34%Less energy to treat the load at a 110,000-population wastewater works, measured by an independent consultancy
26%Less irrigation water used in an independent university field trial (UC Davis), with no loss of yield
Sectors

Built for your sector

Healthcare & HospitalsKeep patients safe and your accreditation secure, with infection, Legionella and AMR risk reducedExploreWater & WastewaterStay in consent, and cut the energy and chemicals it takes to get thereExploreCommercial & FacilitiesMeet your EPC and disclosure obligations while running cost and carbon fallExploreAgriculture & Urban FarmingProtect your yield and soil while using less water and fertiliserExploreLocal AuthoritiesMove your estate towards net zero with compliant assets, funded to saveExploreEmerging MarketsBuild investable, accreditation-ready infrastructure on reliable water, sanitation and powerExploreHotels, Hospitality & LeisureKeep guests safe and pools open, with Legionella risk controlled and pool-hall cost cutExploreData CentresCut the cost and water your cooling burns, and harden Legionella control, without touching uptimeExploreFood & Beverage ProcessingCut your trade-effluent bill and hold consent, without touching food safety or uptimeExplore
Case Studies

Goals met, and independently proven

Aviation

A major UK airport eliminated recurring waterborne pathogens in four days

Years of chemical dosing had failed. Bioload fell from 600 to 0 cfu/g across every test point, confirmed by an accredited laboratory, and held on routine maintenance dosing.

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Wastewater

A 110,000-population works cut treatment energy without new capital plant

Independent monitoring recorded 34% less energy to treat the load, alongside improved nutrient removal, with no new infrastructure required.

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Horticulture

A Dutch hydroponic farm roughly tripled dissolved oxygen in minutes

Oxygen in the nutrient solution rose sharply within minutes of treatment, producing visibly stronger root growth over three months of observation.

Read more
Insights

Thinking for the built environment

Water

Designing out chemical dependency in water treatment

6 min read
Healthcare

What zero-pathogen water systems mean for compliance and accreditation

5 min read
Energy

Where wastewater energy actually goes, and how to cut it

5 min read
Speak to the Team

Tell us your challenge

Tell us the cost, the risk or the obligation you are facing. A senior member of our team will respond, in confidence, with how we would help.

Every enquiry is handled in strict confidence.