Tees (Teesmouth) Nutrient Neutrality Calculator

Stuck behind a Tees (Teesmouth) nutrient condition?

Development draining to the Tees and out to Teesmouth & Cleveland Coast needs to show nitrogen neutrality. The catchment runs a long way up the Tees, so sites across Teesside, County Durham and into North Yorkshire can be caught.

If your site drains to Teesmouth & Cleveland Coast SPA / Ramsar, the planning authority can't grant permission until you've shown the scheme is nutrient neutral — that it won't add nitrogen to a catchment that's already overloaded. NutrientMonkey gets you the number: build the assessment on screen, watch your budget in kg/year update as you go, and export the planning-ready report when it's right.

Which nutrient applies here

Teesmouth is a nitrogen-led catchment, with an official Natural England credit scheme in place for the estuary’s protected coastal habitats. That matters, because the methodology and the credits differ by nutrient — and neighbouring catchments often differ. NutrientMonkey flags the Tees (Teesmouth) catchment for nitrogen and locks the tool to match, so the assessment is right from the start.

Credits in the Tees (Teesmouth) catchment

Tees (Teesmouth) has an official credit price of around £2,700 per kg of nitrogen/year. One credit is 1 kg/year. Buying permanent credits only, the number you need is your governing budget — the greater of the pre- and post-2030 figures, floored at zero; where a 2030 permit change applies, a cheaper split of temporary credits (valid to 1 April 2030) plus permanent is also possible. The calculator shows these live so you can see roughly what mitigation will cost before you commit. Prices change — always confirm the current figure with the scheme.

How the Tees (Teesmouth) calculator works

1. Pick Tees (Teesmouth) from the catchment list — it's pre-flagged for nitrogen.
2. Enter the dwellings & waste water — occupancy, water use (125 or 110 l/p/d plus NE's allowance) and the drainage route (septic, package plant or mains permit).
3. Add land use & SuDS — current vs future land cover and any sustainable drainage, with editable export coefficients for the Teesside, Durham & North Yorkshire catchment values.
4. Export when ready — a branded, planning-ready PDF with the budget in kg/year and every input documented.

Honest about what it is

This is a nutrient-methodology assessment built to support your Tees (Teesmouth) planning application — fast, clear and ready to discuss with your case officer. The official Natural England catchment calculator remains the statutory tool, and your figures should reproduce in it; the report states this plainly. Want it handled end to end? That's what we're here for.

Frequently asked questions

In a different catchment?

NutrientMonkey covers every Natural England catchment.

Or jump to another part of the country:

• Poole Harbour N
• Solent N
• Lindisfarne N
• Stodmarsh N & P
• The Broads N & P
• River Wensum N & P
• Chesil & the Fleet N & P
• Hornsea Mere N & P
• Oak Mere N & P
• Rostherne Mere N & P
• West Midlands Mosses N & P
• River Clun N & P
• River Avon (Christchurch) P
• Somerset Levels & Moors P
• River Itchen P
• River Axe P
• River Camel P
• Derwent & Bassenthwaite P
• River Eden P
• River Kent P
• River Lambourn P
• River Lugg P
• River Mease P
• Esthwaite Water P
• Peak District Dales P
• Roman Walls Loughs P

Or go back to the main NutrientMonkey calculator.

Wider planning support

Nutrient neutrality is rarely the only condition on a scheme. Our energy statements service and the wider SAP & compliance team cover the rest of the planning and Building Control picture — get a quote and we'll talk it through.