Reference	Title	Category
ISO/TC 147/SC 4	Microbiological methods	A
ISO/TC 224	Drinking water, wastewater and stormwater systems and services	A

Notes

Liaisons A: Organizations that make an effective contribution to the work of the technical committee or subcommittee for questions dealt with by this technical committee or subcommittee. 
Liaisons B: Organizations that have indicated a wish to be kept informed of the work of the technical committee or subcommittee. 
Liaisons C: Organizations that make a technical contribution to and participate actively in the work of a working group.