---
type: post-synth-check
title: WAW067
description: A single-AZ NAT gateway serves private subnets across multiple Availability Zones — single point of failure for cross-AZ egress
id: WAW067
severity: error
category: post-synth
lexicon: aws
docs: https://intentius.io/chant/lexicons/aws/rules/
---
A single-AZ NAT gateway serves private subnets across multiple Availability Zones — single point of failure for cross-AZ egress

## Applies to

- [EC2Route](/types/EC2Route.md)
- [Map](/types/Map.md)
- [NatGateway](/types/NatGateway.md)
- [Subnet](/types/Subnet.md)
- [SubnetRouteTableAssociation](/types/SubnetRouteTableAssociation.md)
- [Type](/types/Type.md)