Sonoma Underground Services Inc. 2026 Data Breach in Indiana

Sonoma Underground Services Inc., an Indiana-based contractor, filed a data breach report with state authorities on August 6, 2026. The incident, which occurred in December 2025, involved the exposure of sensitive personal information including Social Security Numbers and home addresses. Individuals affected should consider monitoring their financial accounts and credit reports for suspicious activity.

State: Indiana
Breach date: December 10, 2025
Reported: August 6, 2026

What may have been exposed

Full Name
Social Security Number
Date of Birth
Wage and Compensation Information
Direct Deposit Account Details
Home Address
Driver's License Number
Tax Withholding Information

Sonoma Underground Services Inc., an Indiana contractor, officially reported a data breach to state regulators on August 6, 2026. This filing stemmed from an incident that occurred on December 10, 2025. The notification informs individuals that their personal information may have been compromised, with details made public through required regulatory filings.

The exposed data categories from this incident include Full Name, Social Security Number, Date of Birth, Wage and Compensation Information, Direct Deposit Account Details, Home Address, Driver's License Number, and Tax Withholding Information. These are highly sensitive personal and financial identifiers.

The compromise of such data creates a significant risk for affected individuals. It could potentially lead to various forms of identity theft, fraudulent financial transactions, or unauthorized access to personal accounts. Victims may face challenges in protecting their financial standing and personal privacy due to the nature of the exposed information.

To protect themselves, individuals are generally advised to carefully review financial statements and credit reports for any unfamiliar activity. Placing a fraud alert or a security freeze on credit files can help prevent unauthorized accounts from being opened. Regularly changing passwords for online accounts and remaining vigilant about suspicious communications are also recommended security measures.

What to do if you were affected

Based on the categories of information reported in this filing, these steps can help limit the risk of identity theft and fraud.

Freeze your credit
Place a free credit freeze with Equifax, Experian, and TransUnion. A freeze blocks new accounts from being opened in your name and can be lifted anytime.
Guard against tax fraud
File your tax return as early as possible and consider requesting an IRS Identity Protection PIN so no one can file a fraudulent return in your name.
Watch your financial accounts
Review bank and card statements for unfamiliar activity and turn on transaction alerts. Report anything you don't recognize to your bank right away.
Replace exposed ID documents
Contact your state DMV or the issuing agency about replacing an exposed driver's license, passport, or government ID number.
Stay alert to targeted scams
Be cautious of calls, texts, or emails that reference this breach. Legitimate organizations won't ask you to confirm sensitive details through an unsolicited message.
Keep your notification letter
Save the notice you received. It documents that your information was involved and is often needed to enroll in any credit monitoring offered or to join a related legal claim.

Source: Indiana Attorney General filing

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