For decades, stormwater maintenance has been driven by the calendar, not the condition. Every three or six months, a Council or Facility Manager sends a crew to inspect a Gross Pollutant Trap (GPT) or pump station.
80% of the time, they arrive to find the asset is empty, functional, and requires no work.
This is the “Blind Spot” of asset management. You are paying for a truck, a crew, traffic control, and potentially a Confined Space Entry team, just to look at an empty pit. Conversely, a pit might block two days after an inspection, leaving you exposed to flooding for months until the next scheduled visit.
The shift to Internet of Things (IoT) monitoring changes the game. By moving from “Calendar-Based” to “Condition-Based” maintenance, Asset Managers can slash inspection costs and virtually eliminate the risk of unseen blockages.
Here is how “Smart Stormwater” works and why it is the fastest way to optimise your maintenance budget.
The Problem: The High Cost of “Just Checking”
Traditional maintenance contracts are inefficient by design.
- The “Empty Run”: Sending a vacuum truck to a GPT that is only 10% full is a waste of diesel and labour.
- The “Late Run”: Arriving at a pit that is 110% full means it has been bypassing pollutants into the river for weeks.
- The Safety Risk: Every physical inspection involves opening heavy lids near traffic and potential exposure to gases. The safest inspection is the one you don’t have to do.
The Solution: Inspection by Exception (IoT)
IoT involves installing rugged, low-power sensors into your existing stormwater assets. These devices communicate via low-power wide-area networks (LoRaWAN or NBIoT) to a central dashboard, providing real-time visibility of the underground network.
We deploy three key types of telemetry:
- Level Sensors (Ultrasonic/Radar): These measure the depth of sediment in a GPT or water levels in an OSD tank. They tell you exactly when a pit is 70% full, triggering a cleaning work order automatically.
- Flow & Velocity Monitors: Used in open channels and pipes to detect blockages downstream or measure flood surges in real-time.
- Lid/Tilt Sensors: Detect if a manhole has been opened (security) or blown off by hydraulic pressure (surcharge event).
4 Ways IoT Reduces Your OPEX
1. Eliminating Unnecessary Cleaning
Instead of cleaning every pit on a schedule, you only dispatch crews to the assets that actually need it. Data shows that converting to dynamic cleaning schedules can reduce vacuum truck movements by up to 40-60%.
2. Extending Asset Life
By monitoring pump cycles and vibration, we can predict mechanical failure before it happens. Catching a pump that is “short-cycling” today costs a few hundred dollars in repairs. Replacing a burnt-out pump next month costs thousands.
3. Defensible Budgeting
When you ask for a budget increase, you have data to back it up. Instead of saying, “We think we need more cleaning,”you can say, “Our sensors show that 15% of our network reaches critical capacity within 24 hours of a rain event.”
4. Risk Mitigation (Flood Warning)
For flood-prone areas, IoT provides an early warning system. Alerts can be sent directly to the SES or Council Operations teams when water levels rise faster than predicted, allowing for proactive road closures or sandbagging before the public is at risk.
Strategic Partnership: Linking Data to Action
At Stormwater Services Australia, we don’t just sell you a sensor and walk away. Through our strategic partnership with matter.city, we integrate the digital data directly into your maintenance workflow.
We bridge the gap between the “ping” on a screen and the truck on the road. When the sensor hits the trigger level, our operations team is notified, and the job is scheduled. You get a monthly report showing exactly what was cleaned and, crucially, what didn’t need cleaning, validating your savings.
Summary
In 2025, inspecting a drain with a crowbar and a torch is an obsolete methodology.
Smart Stormwater allows you to do more with less. It protects your budget from waste and your community from flood risk.
Ready to stop paying for “empty runs”?
[Book a Smart Stormwater Pilot] with our advisory team. We can fit-out a sample of your critical assets to demonstrate the ROI of condition-based maintenance.
