Standardization of all geosynthetic products including geotextlles, geomembranes, geocomposite clay liners and other geosynthetic related products.

Quick links


Published ISO standards *


ISO standards under development *

Participating members
Observing members

* number includes updates

Reference Title Type
ISO/TC 221/WG 2   Terminology, identification and sampling Working group
ISO/TC 221/WG 3   Mechanical properties Working group
ISO/TC 221/WG 4   Hydraulic properties Working group
ISO/TC 221/WG 5   Durability Working group
ISO/TC 221/WG 6   Design using geosynthetics Working group
Liaison Committees to ISO/TC 221

The committees below can access the documents of ISO/TC 221:

Reference Title ISO/IEC
ISO/TC 98 Bases for design of structures ISO


Liaison Committees from ISO/TC 221

ISO/TC 221 can access the documents of the committees below:

Reference Title ISO/IEC
ISO/TC 71/SC 7 Maintenance and repair of concrete structures ISO


Organizations in liaison (Category A and B)
Acronym Title Category
EDANA International associations serving the nonwovens and related industries A
IGS IGS - International Geosynthetics Society A

Date Month Location TC/SC Note
21 November 2024 Taian (China) ISO/TC 221  

* Information definite but meeting not yet formally convened
** Provisional

ISO/TC 221 - Secretariat

BSI [United Kingdom]

British Standards Institution
389 Chiswick High Road
London W4 4AL
United Kingdom

Tel: +44 208 996 90 00
Fax: +44 208 996 74 00