Drinking water quality monitoring is a critical process that directly concerns public health. Maintaining quality from the treatment plant to the distribution network requires measuring the right parameters, at the right points, with sufficient frequency.
Critical parameters
The parameters that stand out in drinking water monitoring are:
- Turbidity: One of the most important indicators of treatment efficiency and microbiological risk; it is generally kept at the lowest possible levels.
- Free chlorine: Maintains disinfection in the network; it must not fall below the lower limit and must not exceed the upper limit.
- pH: Decisive for corrosion and chemical balance; kept within a critical range for the health of the pipe network.
- Conductivity and temperature: Provide information about the general character of the water and process behavior.
- Pressure and flow: Show whether quality reaches the network and indicate system continuity.
Standards and legal framework
Drinking water quality is regulated by the Regulation on Water Intended for Human Consumption (and related TS standards). The regulation defines the parameters, limit values and monitoring obligations. Sampling points and frequencies are determined in line with public health requirements.
Limit values and monitoring programs may be updated; in practice the legislation in force and the relevant administrative requirements should be applied.
The right monitoring points
To manage quality correctly, monitoring points must be chosen deliberately:
- Treatment outlet: Directly shows the quality of the water produced by the plant.
- Storage inlet/outlet: Reveals the effect of retention time on quality.
- Distribution endpoints: Represent the final quality that reaches the consumer.
Collecting continuous data from these points improves response speed and makes weak links in the distribution system visible.
From monitoring to decision: the meaning of data
A measurement alone is not enough; the data must be interpreted. A sudden increase in turbidity may indicate a problem in the filtration process or external interference in the network. A drop in free chlorine requires readjusting the disinfection dose. Catching such signals early allows the necessary intervention before the water reaches the consumer.
Tiered alarm thresholds and trend analyses help teams make decisions not only on instantaneous limits but also on quality trends.
Continuity and record-keeping
Continuity is essential in drinking water monitoring. If sensor failures, calibration drifts and communication outages create data gaps, both operational decisions and official reports suffer. Backup, local buffering and calibration tracking must therefore be integral parts of the system.
With its drinking water module, Aqualon Control Center monitors critical parameters in the treatment plant and distribution network 24/7, manages limit alarms and generates compliance reports automatically.