River Camel Nutrient Neutrality Calculator & Phosphate Credits

Phosphorus Cornwall Defra-designated sensitive catchment

Launch the River Camel calculator — free, no sign-up

Opens NutrientMonkey. Pick River Camel from the catchment list and the phosphorus toggle locks to match.

Stuck behind a River Camel nutrient condition?

The River Camel in Cornwall is a phosphorus catchment, bringing nutrient neutrality requirements to development within its catchment. Natural England redrew the boundary in February 2026, reducing the area covered, so it is essential to check whether a specific site still falls within the current catchment.

If your site drains to River Camel SAC, the planning authority can't grant permission until you've shown the scheme is nutrient neutral — that it won't add phosphorus 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

The Camel is assessed for phosphorus, which harms its protected freshwater pearl mussel and otter populations. That matters, because the methodology and the credits differ by nutrient — and neighbouring catchments often differ. NutrientMonkey flags the River Camel catchment for phosphorus and locks the tool to match, so the assessment is right from the start.

Credits in the River Camel catchment

Cornwall Council is developing an official mitigation scheme for the Camel (funded with over £2m of government money, initially based on septic-tank upgrades), but no credits are on sale and no price has been published yet — the council will confirm how and when credits become available. Until then, mitigation is bespoke per scheme.

One credit is 1 kg of nutrient/year. The number you need is your governing budget — the greater of the pre- and post-2030 figures, floored at zero. NutrientMonkey shows this live so you can gauge how much mitigation you'll need before you commit. Scheme availability and prices change — always confirm the current position with the provider or your planning authority.

How the River Camel calculator works

Pick River Camel from the catchment list — it's pre-flagged for phosphorus.
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).
Add land use & SuDS — current vs future land cover and any sustainable drainage, with editable export coefficients for the Cornwall catchment values.
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 River Camel 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? We also prepare nutrient neutrality assessments for River Camel as a service — we run the budget, size the mitigation and produce the report your ecologist and case officer sign off. Tell us about the site and we will quote, usually the same day.

Frequently asked questions

Which nutrient applies in the River Camel SAC catchment?

The Camel is assessed for phosphorus, which harms its protected freshwater pearl mussel and otter populations. A compliant scheme has to be neutral for phosphorus. NutrientMonkey locks the nutrient toggle to match the River Camel catchment automatically, so you can't pick the wrong one.

Is the River Camel calculator free to use?

Yes — selecting the catchment, entering your dwellings and watching the budget update in kg/year is completely free. You only pay £79 +VAT (£94.80 inc VAT) to export the planning-ready PDF report.

How is the River Camel nutrient budget worked out?

It follows Natural England's published nutrient-budget methodology — waste water, current and future land use, SuDS, then the final budget with the ×1.2 (20%) precautionary buffer. For new homes the waste-water term does most of the work and is computed exactly.

Is this the official Natural England calculator?

No — it's a fast, planning-support assessment that implements NE's methodology, and the report says so. The official NE catchment calculator remains the statutory tool, and your figures should reproduce in it.

In a different catchment?

NutrientMonkey covers every Natural England catchment. If you are not certain which one a site falls in, the catchment map shows all 27 on one map of England, coloured by the nutrient that applies.

Or jump to another part of the country:

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.

River Camel Nutrient Neutrality Calculator