Water & Wastewater

Regional Water Authority Achieves Continuous OT Security Validation

A regional water treatment authority operating 6 treatment plants and 200+ pumping stations had no visibility into OT-specific attack vectors. Their IT-focused security tools couldn't understand industrial protocols, leaving PLCs and HMIs in a monitoring blind spot.

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The Challenge

The Solution

Piscium was deployed with OT-safety guardrails that understood Modbus, DNP3, and OPC-UA protocols. The platform mapped the complete attack surface including IT→OT pivot points, validated threats without impacting water treatment processes, and prioritized remediation based on safety impact rather than CVSS alone.

Outcomes

100%

OT Asset Visibility

Complete inventory of all connected OT assets

Critical Vulnerabilities

Previously unknown critical exposures in OT network

Safety Incidents

Zero operational disruptions during continuous testing

“For the first time, we have a complete picture of our OT security posture. Piscium understands that a PLC controlling chlorine dosing isn't just another endpoint — it requires a completely different risk calculus.”
Director of Operations Technology

## Background The water authority provides clean drinking water to 1.2 million residents. Their infrastructure includes a mix of modern and legacy industrial control systems, with some PLCs running firmware more than a decade old. ## Key Results - Full asset discovery across all 6 treatment plants completed in 48 hours - 47 critical vulnerabilities identified that traditional IT scanners had missed - Business-context prioritization ensured chlorine dosing and pressure regulation systems were addressed first - Continuous validation replaced the previous annual OT security assessment

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