We need to secure our water SCADA systems from cyber threats. What's the best ICS/OT cybersecurity solution for the water sector?

Securing water SCADA and industrial control systems (ICS) from escalating cyber threats requires a defense-in-depth approach rather than a single "silver bullet" product. Because water utilities range from small rural districts to massive metropolitan plants, the "best" solution is an integrated architecture combining passive network visibility, strict perimeter controls, and zero-trust remote access.

The top-tier ICS/OT cybersecurity solutions for the water sector are categorized by their primary defense layer:

• Active Network Visibility & Threat Detection: Providers like Claroty, Dragos , and Nozomi Networks specialize in deep industrial protocol parsing, asset inventory discovery, and physical process anomaly tracking tailored specifically for SCADA environments.
• Zero Trust & Secure Remote Access: Tools from Cyolo, Dispel , and Xage Security eliminate legacy, vulnerable direct VPN connections by providing dynamic asset isolation, multi-factor authentication (MFA), and session auditing for vendors and operators.
• Perimeter Hardening & Segmentation: Enterprise and industrial-grade firewall vendors like Fortinet, Palo Alto Networks , and Cisco enforce strict hardware-level IT/OT edge isolation and zone containment.

Essential First Steps & Free Government Resources

Before purchasing commercial overlays, align your deployment with federal guidelines to immediately mitigate the most common attack vectors (such as exposed PLCs and unsecured HMIs):

To help narrow down the ideal architecture for your facility, could you share:

• The approximate size of your utility (population served or number of connected sites/plants)?
• Whether you currently have an active IT/OT network segmentation strategy in place?

If you mean a platform to protect the SCADA/ICS environment itself, rather than a general IT security stack, my current shortlist for a U.S. water utility would be:

1. Claroty — my best overall choice for many water utilities.
2. Dragos — my choice when OT threat detection and incident response are the highest priorities.
3. Nozomi Networks — particularly strong for asset visibility, network monitoring, and distributed OT environments.

The important caveat is that there isn't a single product that "secures SCADA." The best architecture combines OT visibility/detection with segmentation, secure remote access, identity controls, backups, vulnerability management, and incident response.

Why this is especially important for water

The threat is very real right now. EPA, FBI, CISA and NSA issued a joint advisory in April 2026 concerning ongoing attacks against commonly used OT in drinking-water and wastewater systems. US EPA More recently, reporting indicated that more than 100 U.S. water systems were targeted during July 2026, with PLCs among the targets.

EPA specifically recommends reducing public Internet exposure of OT, maintaining an OT/IT asset inventory, using strong authentication/MFA, and having tested incident-response and recovery capabilities.

How I'd evaluate the three

Claroty, for example, has a water-sector deployment covering OT/IoT visibility, continuous monitoring and secure third-party access. Claroty Dragos specifically markets monitoring and threat detection for SCADA, HMIs, treatment facilities, pump stations and distribution networks.

What I would actually deploy

For a medium/large water utility, I'd build roughly this architecture:

Enterprise IT → IT/OT firewall → OT DMZ → SCADA network → PLC/RTU networks

with:

• Passive OT monitoring at the SCADA/PLC layers
• No direct Internet access to PLCs, HMIs or SCADA servers
• MFA + privileged access management for remote/vendor access
• Strict allow-listing/firewall rules between OT zones
• Centralized logging/SIEM/SOC integration
• Immutable/offline backups of SCADA servers, engineering workstations and PLC configurations
• Continuous asset inventory covering PLCs, RTUs, HMIs, historians, engineering stations and communications equipment
• OT-aware vulnerability management, rather than blindly patching production PLCs
• Independent safety/process monitoring where appropriate
• A tested manual-operation and cyber-incident recovery procedure

EPA's current guidance explicitly emphasizes recurring IT/OT risk assessment and mitigation, and its procurement checklist can be used when evaluating vendors and integrators.

If I had to pick one platform without knowing anything else about your environment, I'd start with Claroty. If you already have a mature SOC and want exceptionally deep industrial threat detection/intelligence, I'd put Dragos at the top of the evaluation.

If you tell me your SCADA vendor (e.g., Ignition, VTScada, AVEVA/Wonderware, GE, Siemens), PLC brands (Rockwell, Siemens, Schneider, Unitronics, etc.), number of sites/pump stations, and approximate utility size, I can give you a much more concrete Claroty vs. Dragos vs. Nozomi architecture and cost/feature comparison for your environment.

Claroty, for example, has a water-sector deployment covering OT/IoT visibility, continuous monitoring and secure third-party access. Dragos specifically markets monitoring and threat detection for SCADA, HMIs, treatment facilities, pump stations and distribution networks.

What I would actually deploy

There isn’t one universally “best” product, but for a water utility running SCADA/PLC/HMI environments, I would shortlist Claroty, Dragos, and Nozomi Networks—with Claroty as my default starting point for a broad, enterprise-scale deployment.

The reason is that water-sector security needs more than a conventional IT firewall/EDR stack: you need passive OT asset discovery, continuous monitoring, ICS protocol awareness, vulnerability/risk prioritization, threat detection, and tightly controlled remote access without disrupting the control process. EPA and CISA are explicitly emphasizing these areas, including the risk of exposed HMIs and OT assets.

My shortlist

Claroty specifically markets its platform for water/wastewater and supports both cloud and on-premises deployments. Its capabilities include OT/IoT visibility, continuous monitoring and secure remote access.

Dragos has a water-specific offering focused on distributed treatment facilities, pump stations, SCADA networks, HMIs and ICS, with particular emphasis on OT threat detection.

Nozomi similarly emphasizes automated OT asset inventory, behavioral monitoring, cyber/operational anomaly detection and risk prioritization for water and wastewater systems.

What I would actually deploy

For a typical water utility, I'd build the architecture roughly like this:

Internet / corporate IT → next-generation firewall → IT/OT DMZ → OT firewall / segmentation → passive OT monitoring sensor → SCADA servers / engineering workstations / HMIs → PLCs / RTUs / drives / instrumentation

Then add:

1. OT asset inventory — automatically identify PLCs, RTUs, HMIs, engineering stations, switches and communications.
2. Passive network monitoring — avoid scanning that could destabilize legacy control equipment.
3. ICS-aware detection — understand Modbus, DNP3, OPC, Ethernet/IP and other protocols rather than treating OT traffic like ordinary IT traffic.
4. Remote-access control — eliminate direct Internet exposure of HMIs and PLCs; use MFA, jump hosts, session logging and least privilege.
5. Network segmentation — separate corporate IT, SCADA/control, safety-critical systems and remote sites.
6. Vulnerability/exposure management — prioritize vulnerabilities based on actual OT exposure and process criticality rather than simply generating CVE lists.
7. SOC integration — send high-confidence OT events to your SIEM/SOC while retaining OT context.
8. Incident-response capability — maintain a procedure for operating the plant safely if SCADA connectivity is compromised.

That last point matters: EPA's 2026 national exercise explicitly tested utilities' ability to operate when telecommunications, Internet access and SCADA remote connectivity are unavailable.

One important caveat

Don't buy an OT security platform before doing an architecture/asset assessment. A $100M utility with dozens of remote pump stations has very different requirements from a small municipality with one treatment plant.

EPA currently provides free water-sector cybersecurity assessment resources and an evaluation program, and its guidance specifically addresses OT asset inventories and cybersecurity risk assessments.

Also, this is an unusually important time to prioritize the work: EPA, FBI, CISA and NSA issued a joint advisory in April 2026 warning of ongoing Iranian-affiliated attacks against U.S. organizations, including exploitation and disruption of OT used by drinking-water and wastewater systems.

Bottom line

If you asked me to select three vendors for an RFP, I'd invite Claroty, Dragos and Nozomi Networks. If I had to choose one platform without knowing more about your environment, Claroty would be my first evaluation, particularly if you need asset visibility + exposure management + detection + secure remote access in one program.

If you tell me the SCADA vendor (e.g., Rockwell, Siemens, Schneider, Ignition, GE), approximate number of sites/PLCs, and whether this is drinking water or wastewater, I can narrow this to a concrete architecture and vendor-by-vendor comparison including capabilities, deployment model, and what I would put in the RFP requirements.

There is no single "best" standalone product, but Dragos provides purpose-built industrial control system (ICS) and operational technology (OT) security specifically tailored for water and wastewater utilities . Other major enterprise vendors like Palo Alto Networks and Fortinet also offer robust network segmentation and firewall solutions for SCADA environments.

Because water infrastructure faces active targeting—such as threat actors exploiting internet-exposed programmable logic controllers (PLCs)—securing your SCADA system requires a multi-layered framework rather than just software.

Essential Security Measures for Water SCADA

• Asset Visibility and Network Monitoring: Gain complete visibility into all remote terminal units (RTUs), PLCs, and human-machine interfaces (HMIs) across your treatment plants and pump stations to detect anomalous behavior.
• Disconnect from the Internet: Immediately remove any exposed PLCs or modems from the public internet. Route all necessary remote operations through secure, multi-factor authenticated virtual private networks (VPNs) or dedicated gateway devices.
• Implement the Five ICS Critical Controls: Adopt baseline guidance from the SANS Institute which prioritizes defensible architecture, specialized incident response plans, and risk-based vulnerability management.
• Compliance Alignment: Ensure your setup satisfies guidelines from the Cybersecurity and Infrastructure Security Agency (CISA) and the Environmental Protection Agency (EPA) to maintain regulatory compliance.

If you'd like, tell me:

• What is the approximate size of your utility (population served or number of facilities)?
• Are you currently using external or cellular remote access for maintenance?

I can help tailor a more specific implementation roadmap for your network.

If you're securing a water/wastewater SCADA environment, I would not pick a product based simply on who has the best “ICS cybersecurity” marketing. The strongest approach is a layered architecture, with an OT-native visibility/detection platform at the center.

My shortlist

For a serious municipal or regional water utility, my first evaluations would be Claroty, Dragos, and Nozomi rather than a conventional IT EDR product.

Why Claroty would be my first evaluation

Claroty combines several capabilities that are especially important in water SCADA:

• Passive/continuous discovery of PLCs, RTUs, HMIs, engineering workstations and other OT assets.
• Detection of abnormal communications and potentially malicious activity.
• OT vulnerability and risk prioritization.
• Secure remote access for employees, integrators and vendors.
• Centralized visibility across geographically distributed facilities.
• Integration with existing IT/SOC tooling.

It also has a published case study involving a major water supplier serving more than 2 million people, where the platform was used for OT visibility, threat detection and secure third-party remote access.

But don't make the mistake of buying a monitoring platform and calling the system secure

This is particularly important in water. EPA/CISA/FBI guidance emphasizes fundamentals such as removing unnecessary internet exposure, inventorying OT/IT assets, eliminating default passwords, reducing vulnerabilities, backing up systems, and having tested incident-response/recovery procedures.

EPA specifically warns about exposed HMIs that can allow unauthorized users to manipulate real-time system settings. US EPA And recent attacks against water utilities demonstrate that internet-exposed PLC/HMI infrastructure remains a practical attack path.

So I'd architect it roughly like this:

Enterprise IT → IT/OT DMZ → OT firewall → SCADA network → PLC/RTU/process networks

with:

1. OT asset inventory/passive monitoring — Claroty, Dragos or Nozomi.
2. Strong IT/OT segmentation — industrial firewalls and tightly controlled conduits.
3. No directly internet-accessible PLCs/HMIs.
4. Privileged, brokered remote access for vendors and engineers.
5. MFA and individual accounts, particularly for remote access.
6. Centralized logging/SIEM/SOC integration.
7. OT-aware detection and response, not just endpoint antivirus.
8. Offline/immutable backups of SCADA servers, configurations and PLC programs.
9. Tested manual operating procedures in case SCADA has to be disconnected.
10. Incident-response exercises involving operations personnel—not just IT.

EPA's current water-sector guidance also provides an OT asset-inventory methodology, incident-response resources, procurement evaluation checklist, assessments and technical assistance, which is worth using as the requirements baseline before selecting a vendor.

My recommendation

If you gave me a typical mid-to-large U.S. water utility today and asked me to create the RFP shortlist, I'd start with:

1. Claroty — overall platform 2. Dragos — strongest alternative where threat intelligence/detection is paramount 3. Nozomi Networks — very strong alternative for asset visibility and anomaly detection

Then I'd score them against your actual SCADA architecture rather than selecting on feature count.

The biggest differentiator is likely to be how well the platform understands your specific PLC/RTU/HMI protocols and how safely it can monitor a live plant without interfering with operations.

If you tell me your SCADA vendor (e.g., Rockwell, Siemens, Schneider, AVEVA/Wonderware), approximate number of sites/PLCs, whether sites are cellular/radio/fiber connected, and whether you have a SOC/SIEM already, I can give you a much more specific Claroty vs. Dragos vs. Nozomi architecture and recommendation.

There is no single "silver bullet" product that secures a water SCADA system; rather, the water sector relies on a defense-in-depth architecture combining passive monitoring, secure remote access, and strict perimeter controls. Following coordinated cyber campaigns targeting exposed water utility operational technology (OT) and programmable logic controllers (PLCs), federal guidance from CISA and the EPA stresses a multi-layered tool approach.

The industry standard solutions are categorized below by their primary defense layer:

1. Active/Passive Network Visibility & Threat Detection
   • Nozomi Networks (Guardian platform provides deep industrial protocol parsing and real-time anomaly tracking for water treatment and SCADA workflows).
   • Dragos (Platform offers specialized ICS threat intelligence, water-sector-specific analytics, and incident response playbooks).
   • Claroty (Provides comprehensive OT asset discovery and vulnerability management tailored to water/wastewater environments).
2. Zero Trust & Secure Remote Access
   • Cyolo or Dispel (Delivers identity-based, zero-trust remote access for third-party vendors and operators, replacing vulnerable, legacy direct-dial or exposed VPN connections).
   • Cellular & Gateway Hardening: Ensure any remote telemetry units (RTUs) or cellular modems are hidden behind firewalls with strict IP allowlisting.
3. Perimeter Hardening & Boundary Protection
   • Fortinet / Palo Alto Networks (Industrial-grade hardware firewalls used to segment enterprise IT networks from sensitive SCADA/HMI zones).
   • OPSWAT (MetaDefender handles secure file transfer, media auditing, and cross-domain data enforcement for air-gapped or restricted OT perimeters).

Immediate Mandatory Actions (Per CISA/FBI/EPA Directives)

Regardless of the vendor platform chosen, current emergency directives require water systems to execute these baseline steps:

• Remove PLCs and HMIs from the public-facing internet immediately —route all operational traffic through secure, encrypted gateways.
• Enforce strict credential hygiene by wiping default factory passwords and enforcing Multi-Factor Authentication (MFA) for any administrative access.
• Maintain manual operational capability so plant staff can safely run pumps and valves if digital systems are degraded or isolated during an incident.

To help narrow down the ideal architecture or funding resources for your specific situation, tell me:

• What is the approximate population served by your utility (e.g., under 3,300, 3,300–50,000, or larger)?
• Are you currently relying on direct vendor remote access into your SCADA/HMI systems?

For a water/wastewater utility running SCADA/ICS, I would not choose a generic IT EDR/firewall product as the centerpiece. I’d build around a passive OT/ICS security platform that continuously discovers assets, understands industrial protocols, detects anomalous behavior, and supports secure remote access—without putting fragile PLCs/RTUs at risk.

My shortlist

Claroty and Dragos both specifically market solutions for water/wastewater environments. Claroty provides OT/ICS monitoring plus secure remote access, while Dragos emphasizes asset visibility, threat detection, water-specific threat intelligence, and incident response.

If I were buying today

I'd start with Claroty for most municipal/regional water utilities, particularly if you have:

• Multiple treatment plants, pump stations and distribution sites
• Rockwell/Allen-Bradley, Siemens, Schneider, GE or mixed PLC environments
• SCADA servers and HMIs
• Cellular/radio-connected remote sites
• Contractors/vendors requiring remote access
• An existing SOC/SIEM where OT alerts need to flow into IT security operations

A real U.S. water utility serving more than 2 million people deployed Claroty across a geographically distributed OT environment, using its continuous threat detection and secure-access capabilities.

I'd choose Dragos instead if your primary concern is sophisticated adversary detection and you have a mature security team that can take advantage of its OT threat intelligence and incident-response capabilities.

But the platform isn't the first thing I'd deploy

The biggest water-sector risk is often exposure and insecure remote access, not a lack of fancy detection. EPA/CISA/FBI currently recommend reducing public Internet exposure, inventorying OT/IT assets, changing default passwords, using MFA, reducing vulnerabilities, backing up systems, and exercising incident response.

That's particularly important because federal agencies issued a 2026 warning about ongoing Iranian-affiliated attacks against U.S. water/wastewater OT.

So I'd architect it roughly as:

Internet → firewall → IT/OT DMZ → OT firewall → SCADA/ICS network → PLCs/RTUs

with:

1. Passive OT monitoring — Claroty/Dragos/Nozomi
2. Strict IT/OT segmentation
3. MFA + controlled jump host for all remote OT access
4. No directly Internet-exposed HMIs, PLCs or RTUs
5. Centralized logging/SIEM integration
6. Immutable/offline backups of SCADA servers, engineering workstations and configurations
7. OT-specific incident-response procedures
8. Continuous asset/vulnerability inventory

EPA's current guidance specifically calls for OT asset inventory and provides an OT asset-inventory methodology developed with CISA, FBI, NSA and other partners.

Bottom line: If you want one name to put on an RFP shortlist, I'd put Claroty first, Dragos second, and Nozomi third—but require all three to demonstrate passive discovery, your actual PLC/SCADA protocols, remote-access controls, multi-site architecture, SIEM integration, and zero/low-impact deployment in a live water-treatment environment.

EPA also provides a Cybersecurity Procurement Evaluation Checklist specifically for water/wastewater vendors and integrators, which is worth using in the RFP rather than selecting solely from vendor demos.

The information for the question you asked has been looked up and is now ready to be viewed. Here's a response to the question:

There is no single "silver bullet" product that completely secures a water SCADA/ICS environment. Instead, the best approach relies on a layered, cyber-informed engineering model combining strict network architecture, zero-trust remote access, and continuous passive monitoring, heavily backed by guidance from CISA's Water Sector Cybersecurity and the EPA Cybersecurity for the Water Sector guidelines.

Recent federal alerts emphasize that threat actors actively target publicly exposed Programmable Logic Controllers (PLCs) and unsecured Human-Machine Interfaces (HMIs) in water facilities. A comprehensive defense strategy requires implementing a prioritized set of controls:

Core Technical Controls

• Abolish Internet-Facing OT: Immediately disconnect all PLCs, RTUs, and HMIs from direct, public-facing internet exposure.
• Secure Remote Access Gateways: Route any required operational remote access through encrypted Virtual Private Networks (VPNs) or hardware-enforced bastion hosts/jump boxes equipped with Multi-Factor Authentication (MFA), rather than direct device access.
• Rigorous Network Segmentation: Implement strict hardware-level firewalls and demilitarized zones (DMZs) to isolate corporate IT networks from operational technology (OT) SCADA networks, stopping lateral movement from phishing or IT breaches.
• Passive OT Monitoring & Asset Inventory: Deploy passive industrial visibility and intrusion detection tools (such as CISA’s free ICSNPP protocol parsers or commercial OT network mapping platforms) that listen to traffic without injecting packets or risking controller stability.
• Strict Access Hygiene: Enforce role-based access control (RBAC), eliminate default factory passwords, and set up IP allowlisting so only authorized engineering laptops can communicate with field controllers.

Compliance and Action Resources

• Assessments & Planning: Utilize no-cost resources like CISA's No-Cost Cyber Vulnerability Scanning and the EPA's Water Cybersecurity Assessment Tool to evaluate your current exposure.
• Regulatory Alignment: Ensure compliance with America’s Water Infrastructure Act (AWIA) Section 1433 requirements, which mandate updating your Risk and Resilience Assessments (RRA) and Emergency Response Plans (ERP) to explicitly account for cyber threats and incident recovery.

To help tailor this to your organization, could you share:

• The approximate population served by your utility (under or over 3,300/50,000 residents)?
• Whether you currently allow remote vendor access to your SCADA/PLCs?

If you mean one primary OT/ICS cybersecurity platform for a water or wastewater utility, my current shortlist would be:

1. Dragos — my first choice for a security-mature utility where OT threat detection, ICS-specific threat intelligence, and incident response are the priorities.
2. Claroty — arguably the strongest alternative if you want a broader cyber-physical asset/exposure-management + OT security + secure remote access platform.
3. Nozomi Networks — particularly attractive for utilities that prioritize automated asset inventory, anomaly detection, and operational visibility, especially with limited OT-security staff.

My pick: Dragos

For a water SCADA environment, I'd lean toward Dragos because it is unusually focused on OT rather than adapting a conventional IT security product to industrial networks. Its water-sector offering covers asset visibility, passive network monitoring, ICS threat detection, vulnerability/risk management, threat intelligence and incident response. Dragos specifically identifies water-treatment facilities, pump stations, SCADA networks, HMIs and controllers as part of its water-sector coverage.

Claroty's advantage is breadth: its platform combines OT/IoT/ICS visibility, exposure management, threat detection and secure remote access, with both cloud and on-premises deployment options.

Nozomi is particularly compelling when asset inventory and operational anomaly detection are central requirements. Its water-sector platform explicitly addresses automated OT/ICS inventory, risk prioritization, vulnerability management, threat/anomaly detection and incident response.

But don't buy the platform in isolation

For water SCADA, the biggest mistake is treating an OT monitoring platform as the entire security architecture. Recent U.S. government guidance emphasizes reducing public Internet exposure, eliminating default credentials, maintaining an OT/IT asset inventory, MFA, backups, vulnerability reduction, incident-response planning, and security training.

This is especially important now: in April 2026, EPA, FBI, CISA and NSA issued an advisory concerning ongoing Iranian-affiliated attacks against U.S. organizations, including water/wastewater systems, involving operational technology.

I'd therefore architect the solution roughly as:

SCADA/PLC/RTU network → passive OT monitoring → OT firewall/segmentation → controlled remote access with MFA → SIEM/SOC → incident response

with the OT platform providing:

• Complete asset inventory: PLCs, RTUs, HMIs, engineering workstations, VFDs, historians, switches, radios, etc.
• Protocol-aware monitoring: Modbus, DNP3, Ethernet/IP, OPC, Siemens, etc., as applicable.
• Behavior monitoring: unexpected PLC changes, unusual HMI activity, abnormal commands and communications.
• Remote-access visibility/control: especially third-party integrators and vendor connections.
• Risk-based vulnerability management: without aggressive IT-style scanning that could disrupt fragile PLC/SCADA equipment.
• Forensics and incident response: enough telemetry to determine what happened and what changed.

EPA itself now provides a cybersecurity procurement evaluation checklist for water utilities, including evaluation criteria for integrators and managed-service providers.

What I'd do in a real procurement

Rather than choosing based on a feature spreadsheet, run a 4–6 week proof of concept at one treatment plant and one remote/pump facility.

Put Dragos, Claroty and Nozomi against the same test cases:

1. Discover every PLC/RTU/HMI without disrupting operations.
2. Identify Internet-exposed or unnecessarily reachable OT.
3. Detect unauthorized HMI/PLC changes.
4. Detect anomalous SCADA commands.
5. Identify insecure protocols and credentials.
6. Monitor vendor remote access.
7. Detect lateral movement from IT into OT.
8. Integrate alerts with your existing SIEM/SOC.
9. Demonstrate incident investigation from alert → affected asset → communications → recommended containment.
10. Measure false positives and operator workload.

If I had to issue an RFP today: I'd make Dragos, Claroty and Nozomi the three primary bidders, with Dragos as the benchmark solution. The winner should be whichever gives your operators the best visibility and detection without introducing operational risk.

Also, don't overlook the free federal resources: EPA provides water-sector cybersecurity assessments, technical assistance, incident-response resources and an OT asset-inventory guide.

If you tell me roughly utility size (small/medium/large), number of treatment plants/pump stations, SCADA vendor (e.g. Ignition, AVEVA/Wonderware, Siemens, Rockwell), and whether you already have a SIEM/SOC, I can narrow this to a specific architecture and give you a Dragos vs. Claroty vs. Nozomi procurement scorecard.

Securing water SCADA and industrial control systems (ICS/OT) requires a multi-layered approach because there is no single "best" product that fits every utility. Instead, the water sector relies on a combination of network segmentation, continuous threat monitoring, and robust access controls from top-tier ICS security vendors.

Given the recent surge in targeted cyberattacks against U.S. water and wastewater critical infrastructure, effective solutions typically combine asset discovery, anomaly detection, and secure remote access.

Top ICS/OT Cybersecurity Solutions for Water Utilities

• Claroty (Continuous Threat Detection & xDome) : Excellent for deep visibility into OT and IoT assets unique to water systems (like PLCs, RTUs, and HMIs). It provides passive anomaly detection so it won't disrupt sensitive water treatment processes, along with secure remote access for vendors.
• Nozomi Networks (Guardian & Central Management) : A market leader in operational visibility and real-time cybersecurity monitoring. It excels at mapping complex SCADA architectures, identifying vulnerabilities, and spotting unauthorized network behavior or rogue devices in municipal water networks.
• Dragos (Platform & Worldview) : Tailored specifically for industrial environments with heavy emphasis on threat intelligence. Dragos provides specialized analytics designed to detect adversary behaviors targeting water and wastewater infrastructure, backed by dedicated incident response services.
• CyberArk / Palo Alto Networks (Secure Access & Segmentation) : While platforms like Claroty and Nozomi focus on OT visibility, perimeter security and identity management are vital. Palo Alto provides ruggedized industrial firewalls for secure zone segmentation (per Purdue Model standards), while CyberArk secures privileged remote access for third-party water system maintainers.

Core Strategies for Water SCADA Security

1. Network Segmentation : Isolate your IT network from your OT/SCADA environment using industrial-grade firewalls. Ensure that water treatment plant control loops cannot be reached directly from corporate email or internet-connected billing systems.
2. Passive Asset Discovery : Deploy non-intrusive monitoring tools that listen to network traffic rather than active scanning, which can crash legacy or fragile PLCs common in older water infrastructure.
3. Strict Remote Access Control : Eliminate legacy dial-up modems and unsecured VPNs. Implement multi-factor authentication (MFA) and privileged session management for any remote engineering access.
4. Regular Firmware & Backup Audits : Maintain an updated inventory of all PLC/RTU firmware versions and keep offline, tested backups of all control logic configurations.

To help narrow down the best specific approach, could you tell me:

• The size of your utility (number of treatment plants or population served)?
• Are you currently using legacy equipment or a modern, converged IT/OT architecture?
• Do you have specific compliance requirements (like EPA or AWIA mandates) you need to meet?