ASSE/ARCSA/IAPMO/ANSI Series 21000-2022 
Professional Qualifications Standard for Rainwater Catchment Systems Personnel

ANSI Approved: October 2022

ASSE/ARCSA/IAPMO/ANSI Series 21000-2022, Professional Qualifications Standard for Rainwater Catchment Systems Personnel, contains the uniform minimum requirements for qualified designers and installers of rainwater catchment systems, and inspectors of rainwater/stormwater catchment systems.

The 2022 edition of ASSE/ARCSA/IAPMO/ANSI Series 21000 adds content and clarification to the product knowledge sections of the standard, redefines treatment and disinfection, and clarifies the definition of third-party certification.

21110 — Professional Qualifications Standard for Rainwater Catchment Systems Installers
Applies to individuals who install rainwater catchment systems.

21120 — Professional Qualifications Standard for Rainwater Catchment Systems Designers
Applies to individuals who design, plan, specify, and perform calculations for rainwater catchment systems.

21130 — Professional Qualifications Standard for Inspectors of Rainwater and Stormwater Catchment Systems
Applies to individuals who inspect rainwater and/or stormwater catchment systems.


A hard copy version of this standard is also available.