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Catchment.

your complete SuDS design toolkit

Everything from site appraisal to adoption in one suite: calculators, checkers and report generators, each one citing the governing standard in its output.

41 tools ↓ CIRIA C753 · BRE 365 · Defra NSTS
Fig. 01 — Typical swale sectionNTS

Built to UK standards

Every calculation in the suite references a published UK standard or guidance document: CIRIA C753, Defra NSTS, BRE Digest 365, BS 8582 and the rest of the governing set, cited in the output so a reviewer can trace it.

Built to UK standards

Every calculation references a published UK standard or guidance document, cited in the output so a reviewer can trace it. Select a standard to read more at the source.

Quinnsite Ltd · BSI Member

Methodologies version-logged and last reviewed June 2025.