Bullshit. I personally worked on the incident that happened to St Paul municipal and water systems last year as the Incident Response Technical lead.
The threat actors were not Iranian then. They were Russian.
I personally rebuilt most of their networks, VMware hosts, storage, and servers. The majority of the VMware environments did not have config backups and were running 5 and 6 branches of VMware, only two had 7+.
I had my team compile a massive set of recommendations for them and I wrote the report. Water Systems specifically. They did not listen to us, apparently. The forensics team also did this.
They had FBI, national guard (fucking incompetent), and law enforcement (useless) in all meetings.
If they got into Water, they'll get back into city and municipal again. I guarantee it.
*I'll probably repost a comment similar to this if I see this come up in any cybersecurity comms.