The problem: periodic audits can't keep up. A vulnerability scan run in January misses the unmanaged device added in March, the permission change in June, or the attacker who's been sitting quietly in the network since February. The Environmental Protection Agency's 2024 inspector general review found that out of 1,062 drinking water systems serving more than 193 million people, 97 systems serving roughly 26.6 million people had critical or high-risk cybersecurity vulnerabilities, according to the EPA's OIG report.
This article covers why continuous monitoring matters for utilities, what it needs to include, how to roll it out without disrupting operations, and how it supports compliance and resilience.
Key Takeaways
- Continuous monitoring gives utility teams an ongoing view of assets, vulnerabilities, permissions, and suspicious activity across IT and OT
- Legacy systems, remote facilities, and third-party access all demand monitoring approaches built around safety and uptime
- Alerts without remediation workflows and access governance generate noise instead of reducing risk
- Nation-state actors have maintained persistent footholds in U.S. infrastructure for years, not days
Why Utilities Need Continuous Cybersecurity Monitoring
Utilities aren't just another IT target. A breach can knock out power to hospitals, contaminate a water supply, or halt regional transportation. The stakes include public safety, environmental impact, and in some cases national security, not just downtime or lost revenue.
IT/OT Convergence Opens New Paths
Business systems, vendor VPNs, cloud platforms, and engineering workstations now connect directly or indirectly to systems that control physical processes. A compromised billing server or a contractor's laptop can become a bridge into the control network.
The Cybersecurity and Infrastructure Security Agency has flagged this convergence as a growing source of cascading-impact risk. Compromised IT environments increasingly serve as a pivot point into OT.
Visibility Gaps Are Built Into the Infrastructure
Utility environments weren't designed with modern monitoring in mind:
- Legacy control systems and PLCs that predate current security practices
- Unsupported software still running critical processes
- Distributed substations, pump stations, and treatment facilities
- Sensors, HMIs, and virtual infrastructure layered on top of decades-old hardware
A point-in-time scan captures none of this as a moving picture. Assets get added, configurations drift, and accounts accumulate permissions between assessments. The gap between scans is exactly where attackers operate.
The Threat Is Already Inside, Not Just Outside
This isn't theoretical. CISA and the FBI confirmed that Chinese state-sponsored actors known as Volt Typhoon pre-positioned themselves inside U.S. critical infrastructure networks, with some footholds persisting for at least five years before discovery, according to CISA's 2024 advisory. The goal wasn't immediate disruption. It was ready access for a future moment of conflict.
A separate 2023 incident at a Pennsylvania water utility showed how a single exposed remote-access device let attackers reach a booster station controller directly, forcing operators to switch to manual control. No periodic quarterly scan would have caught that exposure in time.
What Continuous Monitoring Should Include
Continuous monitoring is a repeatable cycle: collect current asset and security data, analyze risk, prioritize action, validate that remediation actually worked, and keep the environment picture updated. Skip any one of those steps and you're back to periodic guessing.
Asset Discovery and Inventory
You can't protect what you can't see. Effective programs automatically discover and inventory:
- Windows and Linux workstations, servers, and virtual machines
- Network-connected equipment and OT-adjacent systems
- Unmanaged devices operating outside Active Directory
- Cloud infrastructure across AWS, Azure, and Google Cloud
This is where Anamo's CDM-SIEM platform fits the picture. It runs a lightweight agent across Windows and Linux hosts and autonomously captures UUIDs, host details, users, groups, ports, permissions, and software inventories without manual data entry.
Vulnerability and Exposure Monitoring
Finding CVEs is the easy part. Prioritizing them is where programs succeed or fail. Rank findings by exploitability, operational importance, and safety impact, not raw severity score alone. A medium-severity CVE on an internet-exposed engineering workstation deserves more urgency than a critical CVE on an isolated backup server.
Identity, Permissions, and Behavioral Monitoring
Privileged accounts, stale credentials, and excessive permissions are how attackers move laterally once they're in. Monitoring should flag:
- Permission escalations and new privileged accounts
- Dormant accounts suddenly reactivated
- Unusual process behavior or unexpected network communications
- Early indicators of attack, not just confirmed compromise
Anamo's platform applies what it calls Comparative HashID Analytics to compare system state over time, catching permission and identity changes within seconds rather than at the next audit cycle. The goal is to surface indicators of attack before they become indicators of compromise, shrinking the window attackers have to operate undetected.
Those signals only help if the right people see them. Security analysts, plant operators, and executives need the same underlying data at the right level of detail for each role: granular host-level evidence for analysts, summarized risk scores for leadership.
How to Implement a Continuous Monitoring Program Without Disrupting Operations
Utilities can't treat OT like a typical IT network. A misplaced active scan can crash a PLC. Here's how to roll out monitoring without creating the outages you're trying to prevent.
Start With Governance and a Baseline
Before deploying anything, identify:
- Critical services and their business and OT owners
- Safety constraints and regulatory obligations
- Remote facilities and third-party connections
- Acceptable monitoring methods for each environment
Then build an authoritative baseline: discover assets, document owners and locations, map IT-to-OT dependencies, and flag internet-exposed or unknown systems.
Deploy Passively in OT Environments First
NIST's SP 800-82 Rev. 3 guidance recommends passive collection methods that inspect existing traffic without injecting new packets into sensitive control networks. Probing certain OT devices can cause unexpected behavior.
Practical safeguards include:
- Test monitoring tools in representative environments first
- Use segmentation and change control
- Schedule any active scanning during planned maintenance windows
Connect Findings to Remediation, Not Just Alerts
An alert that nobody acts on is wasted effort. Build a workflow that:
- Validates findings and eliminates false positives
- Assigns an owner and a timeline
- Uses compensating controls when patching isn't safe
- Confirms that risk was actually reduced after the fix
Stage the Rollout If Resources Are Limited
Most utilities can't do everything at once, and they shouldn't try:
- Start with inventory and exposure visibility
- Add vulnerability and access monitoring
- Layer in behavioral detection and automated reporting
- Mature toward continuous improvement cycles
This staged approach matters most for mid-sized utilities and municipal operators. Teams managing multiple facilities with lean security staff need monitoring that collects data autonomously rather than requiring constant manual tuning.
Using Monitoring to Strengthen Governance, Compliance, and Operational Resilience
Monitoring data serves as operational insight and compliance evidence. Asset inventories, vulnerability records, access reviews, and remediation history map to requirements under major frameworks:
- NIST Cybersecurity Framework
- NIST SP 800-53
- NERC CIP standards for in-scope electric utilities
For water systems, America's Water Infrastructure Act requires risk and resilience assessments for qualifying systems, with reassessment at least every five years.
Monitoring supports compliance; it doesn't automatically guarantee it. You still need documented policies, trained staff, and tested incident response procedures. What monitoring provides is the ongoing evidence trail those programs require.
Resilience Gains Are Measurable
The SANS 2024 ICS/OT Cybersecurity Survey found that OT-specific monitoring adoption climbed from 33% of respondents in 2019 to 52% in 2024. More than half of respondents now detect compromises in under 24 hours, according to SANS's 2024 survey. That's a meaningful shift from the multi-day detection windows common just a few years earlier.
Anamo's CDM-SIEM platform brings that evidence trail together in one interface: asset data, CVE tracking, permission forensics, and alerting. Multi-tenancy lets utilities and service providers managing several facilities see risk across sites without stitching together separate tools.
The platform includes zero trust administration and GRC capabilities aligned to CISA's CDM program. That matters for utilities and government contractors who need continuous diagnostics, not only a point-in-time report.
Utilities evaluating this kind of consolidated approach can reach Anamo at Sales@Anamo.io or 949.629.3900.
Frequently Asked Questions
What are the top cybersecurity threats facing the utilities industry?
Ransomware, compromised credentials, and nation-state pre-positioning are the leading concerns, alongside legacy-system vulnerabilities and exposed OT or IoT devices. Supply-chain access and insider risk round out the list for most operators.
What is the role of cybersecurity in the energy and utilities sector?
Cybersecurity protects service availability, the physical processes utilities control, and customer data, while supporting regulatory obligations. For critical infrastructure, it also underpins national resilience against coordinated attacks.
Which industries are most targeted by cyberattacks?
Targeting shifts year to year, but manufacturing and financial services currently see the highest incident-response case volumes, with energy and transportation also frequently targeted due to their operational importance.
What are the main types of cybersecurity?
Network, endpoint, application, cloud, identity and access, data, and OT/ICS security each cover distinct technical scopes. Threat detection, incident response, and governance/risk/compliance functions tie these together operationally.
How does continuous monitoring improve utility cybersecurity?
Ongoing visibility into assets, vulnerabilities, permissions, and behavior lets utilities catch changes as they happen instead of waiting for the next audit cycle. That shortens investigation time and confirms that remediation actually worked.
How can utilities monitor IT and OT environments without disrupting operations?
Passive collection, segmentation, and change management gather data without adding risky traffic to control networks. Validate in representative environments and coordinate with vendors before deployment to protect uptime and safety systems.
