Drinking Water for 3 Million People – KRITIS-compliant with IRMA®
COMPANY
ZV Landeswasserversorgung
SECTOR
Drinking Water Supply
LOCATION
Stuttgart
CUSTOMER SINCE
2017
SOLUTION
IRMA®
~ 250
cities and municipalities in Baden-Württemberg are being supplied
95 Mio.
cubic meters of drinking water per year
~ 790
kilometers of transmission network
Image: Drinking water tank in Amstetten | © Landeswasserversorgung Stuttgart
Initial Situation
The Goal in Stuttgart: Automated Attack Detection in OT
As a drinking water supplier for approximately 3 million people in 250 cities and municipalities in Baden-Württemberg—including Aalen, Ellwangen, Schwäbisch Gmünd, Göppingen, Esslingen, Stuttgart, Ludwigsburg, and Ulm—the Landeswasserversorgung Association is part of critical infrastructure.
With the implementation of an Information Security Management System (ISMS) in accordance with ISO 27000, the question arose: How can automated attack detection be implemented in OT that is reliable both in daily operations and during audits—without overburdening the operations team?
“Due to its quick installation and intuitive operation, the IRMA® Security Appliance is ideal and provides significant added value for both compliance audits and day-to-day operations.”
Zweckverband Landeswasserversorgung, Stuttgart
Solution
Regulatory-compliant Monitoring with IRMA®
Since 2017, IRMA® has been monitoring the OT networks of the special-purpose association passively and feedback-free.
The appliance automatically detects all network participants, maps their communication, and triggers alerts in the event of anomalies.
The centralized threat level summarizes the security status in a single figure — visible to operations management and auditors.
The integrated B3S Water module supports industry-specific risk analysis in accordance with the DWA/DVGW standard.
Image: Deep well at the Burgberg Water Treatment Plant | © Landeswasserversorgung Stuttgart
Results & Added Value
Relief in Both Day-to-day Operations and During Audits
The special-purpose association meets the legal KRITIS requirements, while simultaneously having a tool for day-to-day operations that delivers real added value.
Quick Installation
for real-time anomaly detection
Instant Overview
of all assets and connections
Documented Proof
of attack detection for ISO 27000 audits
Image: Aerial view of the Langenau Water Treatment Plant | © Landeswasserversorgung Stuttgart
Customer Profile
Landeswasserversorgung Stuttgart
Landeswasserversorgung (LW) is a municipal association for long-distance water supply in Baden-Württemberg, headquartered in Stuttgart. Its 106 association members (as of 2025) include cities, municipalities, associations, and utility companies in Baden-Württemberg and Bavaria.
With three million people in its service area, Landeswasserversorgung is one of Germany’s largest and most established long-distance water supply systems, delivering approximately 95 million cubic meters of drinking water annually to around 250 cities and municipalities in Baden-Württemberg as well as several municipalities in Bavaria.