Public water supplies are vital resources and rather costly infrastructures.
High alkalinity concentrations in drinking water cause scale deposition in the water distribution system.
As a consequence this scaling entails rather extensive and costly maintenance issues for the municipalities.
Keeping the alkalinity in the desired range and thus minimising maintenance labour and costs, is essential. Therefore alkalinity levels need to be monitored – ideally continuously and autonomously.
The method of choice is titration
Titration is a very reliable and accurate method for monitoring the alkalinity concentration in drinking water supply.
It is also far superior to inline pH measurement as it doesn’t require any calibration.
Metrohm’s online analyser 2026 does it:
- Typical analysis range: 0 – 400 mg/L as CaCO3
- Analysis time: 10 min per sample stream
- Accuracy: ± 0.5 % from measured value
- Repeatability: ± 0.5 % from measured value
- Detection Limit: 0.3 mg/Ln
