From Checklists to Data-Driven Resilience: Rethinking Wastewater and Sewage Treatment Plant Maintenance

The reality is that maintenance still lives on paper

Across many facilities, daily maintenance still revolves around paper checklists:

• Inspecting clarifier drive systems for abnormal torque or oil leaks
• Observing aeration blowers for airflow restrictions or bearing temperature issues
• Logging dissolved oxygen (DO) levels to ensure NPDES compliance is maintained

These routines are critical. They keep plans compliant, safe, and operational. But there’s a problem most teams don’t talk about: the data from those checks often goes nowhere. It sits in binders, filing cabinets or clipboards stacked in a supervisor’s office. But once it’s written down, it’s essentially lost.

The big risk: Knowledge walking out the door

Putting things on paper is one thing, but there’s another layer to this challenge, and it’s growing. Many wastewater plants rely on experienced operators who just know when something isn’t right:

• A pump that “sounds off”
• A vibration that feels different from the day before
• A pattern on a machine that signals a failure is going to happen

The issue is that the workforce across North America is aging, and those experts who “just know” are retiring and taking decades of tacit knowledge with them. If your maintenance strategy is still dependent on manual checks, human memory, and reactive fixes, it becomes harder to maintain performance, compliance, and uptime.

Reactive to resilient: A new model for wastewater maintenance

Traditional wastewater plant maintenance is built around finding problems during routine checks. But modern operations are shifting toward something fundamentally different: Systems that tell you when they need attention before failure happens. This is where the shift from maintenance to operations and maintenance becomes critical.

In a modern facility, your assets don’t wait for inspection. They communicate. With solutions from companies like Rockwell Automation and platforms like Fiix CMMS, wastewater operations can move beyond clipboard-based routines.

Instead of relying solely on daily patrols:

• Sensors continuously monitor asset health
• Systems detect anomalies in real time
• Work orders are automatically triggered in a CMMS
• Maintenance teams act based on data, not guesswork

Let’s examine a common wastewater example regarding lift stations. Traditionally, wastewater lift station operation and maintenance involves:

• Scheduled inspections
• Manual checks for clogging or pump wear
• Reactive fixes after alarms

In a connected environment:

• Sensors detect flow irregularities or vibration changes
• Alerts trigger instantly
• A work order is automatically created
• Maintenance is scheduled before failure escalates

Another example is how the new model can improve the risk of NPDES violations. In aeration blowers for example, if a blower fails, your biological process dies, and you risk an NPDES permit violation for high ammonia or BOD. In a traditional setup, you might not notice a blower struggling until a high-level alarm trips. In a connected model, vibration sensors on the blower housing detect early-stage bearing wear.

What the new model looks like in practice

Forward-thinking utilities are already moving in this direction. For example, Rockwell Automation has supported digital transformation initiatives (opens in new tab), including digital twin implementations in water treatment facilities, to simulate system performance, predict failures, and optimize operations before issues occur in the real world.

The goal isn’t to eliminate maintenance—it’s to make every maintenance action smarter, traceable, and predictive.

That’s the shift:

• From checking equipment → to understanding equipment behavior
• From recording data → to using data in real time
• From reacting to failures → to preventing them entirely

From checklist to connected system

This doesn’t mean abandoning checklists overnight; it means evolving them. Here’s how a traditional wastewater treatment plant maintenance checklist compares to a modern approach:

Traditional daily checklist

1. Inspect pumps visually
2. Record readings manually
3. Note abnormalities
4. Report issues after rounds

Connected maintenance approach

1. Sensors capture readings continuously
2. Data flows directly into a CMMS
3. Threshold breaches trigger alerts automatically
4. Work orders are generated instantly

The work still happens, but now every action creates a usable and trackable data set.

Even with a connected system you still need a checklist

If you’re early in this journey, here’s a simplified daily maintenance checklist you can use as a baseline in your CMMS or otherwise:

Wastewater treatment plant daily maintenance checklist

Preliminary treatment

1. Clear debris from grit chambers and bar screens
2. Check clarifier scum troughs and inspect aerator blower filters

For solid handling

1. Grease bearings on sludge dewatering equipment (presses and centrifuges)

Pumps and motors

1. Check for unusual noise or vibration
2. Verify temperature levels
3. Inspect seals and lubrication

Lift stations

1. Confirm proper flow rates
2. Check for clogging or debris
3. Inspect alarms and backup systems

Electrical systems

1. Verify panel readings
2. Inspect wiring and connections
3. Test emergency systems

Instrumentation

1. Calibrate sensors (if manual)
2. Verify readings against expected ranges

General plant conditions

1. Check for leaks or corrosion
2. Inspect safety equipment
3. Ensure compliance logs are updated

Compliance

1. Verify influent and effluent flow meters are calibrated to ensure accurate BOD/TSS reporting

Download the checklist (PDF opens in new tab 74 KB)

The hidden cost of paper-based maintenance

Manual processes don’t just slow things down, they introduce risk:

• Compliance anxiety: Audits become stressful when records are scattered
• Missed trends: Early warning signs go unnoticed
• Inefficiency: Teams spend time collecting data instead of acting on it
• Knowledge loss: Critical insights aren’t captured or shared

In an industry where uptime, safety, and regulation are non-negotiable, that’s a growing liability.

In the U.S., the Clean Water Act (CWA) and NPDES permits can trigger penalties of up to $50,000 per day (opens in new tab), per violation, with higher fines for repeat or knowing offences. When something goes wrong, regulators don’t just ask what happened. They ask whether critical systems like aeration were maintained according to manufacturer specifications. If maintenance history lives on paper, proving due diligence becomes difficult, and undocumented work may be treated as work that never happened.

Ontario enforcement (opens in new tab) shows the same pattern. In 2024 (opens in new tab), the Town of Atikokan was fined $60,000 under the Ontario Water Resources Act (OWRA) for failing to comply with a Director’s Order related to its wastewater collection and treatment system, including missed deadlines for required sewage infrastructure upgrades. The case highlights something very important for wastewater operators: compliance failures don’t have to involve intentional misconduct. Delays, incomplete follow through, and weak documentation can still result in significant penalties.

Below is a comparison table outlining key wastewater related fines and penalties in the U.S. and Canada (Ontario).

Assessing your maintenance maturity

Not every plant needs to jump straight to full automation. But every plant should understand where they stand.

Ask yourself:

• Are we still relying on paper-based checklists?
• Can we track asset performance trends over time?
• Do our systems trigger maintenance automatically?
• Are we capturing knowledge before experienced staff retire?

If the answer to most of these is “no,” your maintenance strategy may be stuck in the past.

From checklist to roadmap

There’s nothing wrong with wanting a wastewater treatment plant maintenance checklist. It’s the starting point. But in 2026, that checklist should be more than a static document. It should be part of a connected, intelligent system that:

• Captures data automatically
• Translates insights into action
• Builds resilience into your operations

Because the future of wastewater maintenance isn’t about doing more checks. It’s about making every check count.

Sources and influences

Daily maintenance of wastewater facilities

Office of Water Programs. (2019). Operation of wastewater treatment plants (Vol. 1, 8th ed.). University Enterprises, Inc.; Pearson Custom Publishing.

Wastewater checklist for maintenance

Water Environment Federation. (2014). Operation of municipal wastewater treatment plants: Manual of practice no. 11 (6th ed.). Water Environment Federation.