The data of the Puyallup residents was compromised after their billing vendor, Automatic Funds Transfer Services, Inc (AFTS) was targeted in a cyber-attack.
The attackers got access to the information like resident's name, addresses, utility bill account number, and other personal information.
Source: https://patch.com/washington/puyallup/puyallup-confirms-data-security-incident-utility-billing
"id": "AFT18372322",
"linkid": "afts",
"type": "Breach",
"date": "02/2021",
"severity": "80",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"