The UK's leading Nutrient Neutrality provider
From AI-mapped site identification through offline survey capture, automated homeowner workflows, and Technical Mitigation Reports—our proprietary platform automates the entire nutrient neutrality process. S106 Unilateral Undertakings auto-generated and connected to Land Registry. Tank monitoring with immutable 90-year audit trails. We offer a fast turnaround and are usually cheaper than competitors. Nothing on the market compares.
From tank upgrades to planning approval - faster and cheaper than anyone else
We replace outdated septic tanks across the UK with modern, regulation-compliant Package Treatment Plants (PTPs). But here's what sets us apart: our proprietary AI platform automates the entire process from site mapping through to credit generation. No one else has built this.
For homeowners: no cost, end-to-end compliance, and a fully monitored system with a 90-year audit trail. Your tank is protected. Your environment is cleaner.
For developers: nutrient credits that unlock planning approval in protected catchment areas. Upload your budget, get instant mitigation options, pay and receive all the required documents fast.
The UK has a growing
water quality crisis
Pollution from outdated septic systems and sewage overflows is placing increasing pressure on our rivers and planning system. Across the country, local authorities are being forced to restrict new development to protect fragile catchments.
At STS, we’re tackling the problem from both ends — upgrading existing systems and unlocking sustainable growth through nutrient mitigation.
Approved by Natural England
STS has been through Natural England’s Discretionary Advice Service (DAS), a formal, chargeable process providing detailed environmental advice on nutrient neutrality mitigation schemes.
As part of this process, Natural England confirmed that Local Planning Authorities can rely on the STS scheme when undertaking Appropriate Assessments, giving certainty to developers, planners, and homeowners.
Ready to upgrade your
septic system?
Book a free survey by speaking to our team — no obligation, just clear advice.
