Distribution of rural stations by thresholds of AOT40 concentrations for the year 2011. AOT40 concentrations for the protection of forest is the accumulated dose of hourly concentrations of O3 over a threshold of 40 ppb, equivalent to 80 μg/m3, accumulated over five month (April to September).
By having aerators and water flow restrictors fitted on your taps, the flow of water will feel stronger, but will consist of less water and more air. Aerated taps can reduce the water flow by 30-40 %.
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