Mean of 2,201 millimetres of rainfaill in 2022

According to Statistic Mauritius, the country received 4,105 million cubic metres (Mm3) of precipitation (rainfall), up by 8.7% compared to 3,776 Mm3 recorded in 2021.

Some 2,463 Mm3 (60%) of the precipitation went as surface runoff, while evapotranspiration and ground water recharge accounted for 1,231 Mm3 (30%) and 411 Mm3 (10%).

During the year 2022, the mean amount of rainfall recorded around Island of Mauritius was 2,201 millimetres (mm), representing an increase of 8.7% compared to 2,025 mm in 2021. This represented an increase of 9.1% from the long term mean (1991-2020) of 2,018 mm.

The wettest month in 2022 was April with a mean rainfall of 442 mm, representing an increase of 114.6% relative to the long-term (1991-2020) mean of 206 mm. October and November were the driest month with a mean of 33 mm of rainfall, registering a deficit of 54.8% and 61.2% compared to the long-term (1991-2020) mean of 73 and 85 mm respectively.

The mean rainfall registered in Rodrigues at Pointe Canon in 2022 was 860 mm compared to 1,029 mm in 2021, down by 16.4%. The highest amount of rainfall with 149 mm was recorded in the month of March while the least amount was in December with 13 mm.

Total volume of water sold in 2022 was 127.4 Mm3, out of which about 88.9% (113.2 Mm3) constituted of potable water and the remaining 11.1% of non-treated water. Some 87.5 Mm3 of water were sold under domestic tariff accounting for 68.7% of the total volume of water sold.

From 2021 to 2022, the total volume of water sold increased from 121.9 Mm3 to 127.4 Mm3, up by 4.5%.

The amount of revenue collectible from the sales of water for the year 2022 increased by 8.2%, that is, from Rs 1,513.5 million collected in 2021 to Rs 1,638.3 million