Water utilities should treat credential hygiene as a core security control, not an IT convenience. The priority is to replace weak or reused passwords with unique, strong credentials, then layer single sign-on, multi-factor authentication, directory integration, and role-based access controls. Centralising secrets in an encrypted vault also helps reduce exposure, improve auditability, and make incident response faster when access needs to be reviewed.
Why credential hygiene has to span both plant operations and business IT
Water utilities do not just manage office logins. They also depend on accounts tied to treatment plants, remote monitoring, billing, vendors, and integration layers, which means a weak password or reused secret can move from routine access into operational disruption. The practical goal is to reduce the chance that one compromised credential becomes a broad trust failure across systems.
That is why the control set in the direct answer matters as a package. Unique passwords reduce replay value, single sign-on reduces account sprawl, multi-factor authentication raises the bar for stolen credentials, and role-based access control narrows what any account can do if it is abused. Centralised secrets management then makes it easier to know where sensitive access material exists and who can retrieve it.
Utilities should also treat directory integration as more than convenience. When business and operational systems share identity sources, inconsistent account ownership, stale entitlements, or orphaned accounts become a real exposure point. Good identity design makes access review, revocation, and escalation handling faster when an account has to be contained during an incident.
For background on why this matters at scale, NHIMG’s Ultimate Guide to NHIs notes that only 5.7% of organisations have full visibility into their service accounts, which is a reminder that hidden or poorly governed accounts are often the ones that fail first.
Where credential-based compromise usually starts in utility environments
The most common failure pattern is not a sophisticated exploit. It is a credential that is reused, shared, never rotated, exposed in a script, or left active after a job or vendor relationship has ended. Once an attacker has valid access, they often do not need to break in again, they simply operate as an allowed user until detection or revocation stops them.
In utilities, the risk is amplified by long-lived operational access. Remote support accounts, service credentials, and integration accounts tend to be stable by design, but stability becomes exposure when those credentials are not tightly scoped, not monitored, or not retired promptly. The same problem can exist in business systems, where broad directory group membership or excessive application permissions create unnecessary reach.
- Reduce reuse by issuing unique credentials per user, system, and vendor relationship.
- Prefer short-lived or centrally governed secrets where the system can support them.
- Review who can authenticate interactively and who should only use non-interactive access.
- Remove standing access for dormant users, former contractors, and old integrations.
NHIMG’s Guide to the Secret Sprawl Challenge is directly relevant here because it focuses on hardcoded credentials, CI/CD exposure, and remediation patterns that frequently create the first foothold for credential abuse.
Practitioner priorities for hardening access without slowing operations
Single sign-on and multi-factor authentication are strongest when they are applied to every high-value access path, not only the obvious office-facing ones. The practical decision is to make exceptions rare, documented, and time-bounded, especially for remote administration, vendor support, and privileged operator functions. If a team says a system cannot support stronger controls, that should trigger a compensating-control review rather than a permanent waiver.
What to verify: confirm that every privileged or remotely reachable account has a named owner, that passwords and secrets are not stored in spreadsheets or code, and that revocation can be completed quickly when an account is suspected compromised. Utilities should also test whether the directory, vault, and role model actually reflect current business and operational duties, not last year’s org chart.
What to measure: track the number of shared accounts, the age of unused credentials, the percentage of systems covered by MFA, and the time required to remove access after an employee, contractor, or vendor change. Those operational signals are often more useful than a generic compliance score because they show whether compromise is still easy to turn into persistence.
Practitioner takeaway: the best credential program for a utility is the one that makes stolen access short-lived, tightly scoped, and easy to revoke, even when the environment mixes IT, OT, and third-party dependencies.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 address the attack and risk surface, while CIS Controls v8, NIST CSF 2.0 and NIST Zero Trust (SP 800-207) set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 — Secrets and Credential Management | Utilities rely on long-lived credentials and secrets that drive compromise risk across systems. |
| NHI-03 — Identity Lifecycle and Offboarding | Revocation speed and account retirement are central to stopping compromised utility access. | |
| NHI-05 — Authorization and Least Privilege | Role-based access control and narrow entitlements reduce the blast radius of stolen credentials. | |
| Recommendation — Centralise secrets, rotate them, and eliminate hardcoded or shared credentials. Enforce rapid deprovisioning and rotation when users, vendors, or systems change. Limit each account to the minimum access needed for its operational role. | ||
| CIS Controls v8 | 5 — Account Management | Account ownership, lifecycle, and removal are essential to reduce credential misuse. |
| 6 — Access Control Management | Least privilege and MFA directly reduce the impact of compromised credentials. | |
| 8 — Audit Log Management | Detection and investigation depend on knowing when credentials are used or abused. | |
| Recommendation — Manage account creation, review, and removal with strict ownership and approval. Restrict access by role, enforce MFA, and remove unnecessary standing privilege. Log authentication and privilege events so abnormal access can be investigated quickly. | ||
| NIST CSF 2.0 | PR.AA — Identity Management, Authentication and Access Control | The question is fundamentally about strengthening authentication and access across systems. |
| PR.PS — Platform Security | Credential compromise often exploits weak platform and secret handling practices. | |
| Recommendation — Apply identity and access controls consistently across all critical utility systems. Harden platforms that store, transmit, or validate credentials and secrets. | ||
| NIST Zero Trust (SP 800-207) | 5.1 — Policy Decision and Enforcement | Zero trust access decisions help reduce overtrust in valid but compromised credentials. |
| 2.3 — Continuous Diagnostics and Mitigation | Continuous monitoring is needed to spot abuse of valid credentials in real time. | |
| Recommendation — Make access decisions dynamically and verify every request before granting reach. Continuously evaluate access activity and revoke anomalous sessions quickly. | ||
Related resources from NHI Mgmt Group
- How should higher education teams reduce credential-based breaches across campus systems?
- How should universities reduce business email compromise risk across mixed identity populations?
- Why does role-based access control reduce risk in systems with many operational permissions?
- How should healthcare teams reduce the risk of credential-based breaches in patient systems?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on September 17, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
