In East Lima overcomes the allowed limits of pollution in June

The highest levels of air pollution in Lima Metropolitan area during June of 2025 were registered in East Lima, specifically in the monitoring stations placed in Santa Anita and Pariachi, according to reports of the National Service of Meteorology and Hydrology (SENAMHI), collected in the technical report Environmental Statistics of the National Institute of Statistics and Informatics (INEI).

In Santa Anita was detected the most critical concentrations of fine particulate matter (PM2,5), greatly surpassing the Standard of Environmental Quality Standard de Calidad Ambiental (ECA), fixed in 50,0 µg/m³. The measurements fluctuated between 45,7 µg/m³ (June 19th) and 108,0 µg/m³ (June 2nd).

Pariachi registered a similar trend, with concentrations of PM2,5 that oscillated between 25,4 µg/m³ (June 22nd) and 80,3 µg/m³ (June 4th), also above the limited allowed.

These particles, which aerodynamic diameter is lower than 2.5 microns, just can detect through electronic microscopy and comes from different fuel sources such as vehicles, power plants, residential combustion, forest fires and industrial processes.

During June 2025, the city of Lima registered a maximum monthly index of ultraviolet radiation of 4, classified as of low exposition for the health. This value was reached on June 26 and did not change compared to the same month of 2023 (4), when registered the same level.

In June 2025, the potable water production reached 64 million 20 thousand cubic meters, representing an increase of 0.4%compared to June of 2024, when 63 million 786 thousand cubic meters were registered.

During the same month, SENAMHI informed that the average flow of Rimac River was of 25,91 m³/s, an increase of 17.8 % compared to its historic average (21,99 m³/s) and of 24.0 % compared to June of 2024 (20,90 m³/s).

Chillon River also showed a growth: its average flow was de 2,23 m³/s, which mean tan increase of 6.2% compared to its historic average (2,10 m³/s) and of 30.4 % compared to the last year (1,71 m³/s).

In June 2025 were registered 388 emergencies at national level, an increase of 2.9 % compared to the same month of 2024 (377). These emergencies left 2,418 affected people, which represented an increase of 115.7 %.

The most affected departments were Cusco (67 emergencies), Lima (47), Cajamarca (28), Ancash (24) and Huanuco (21). In lower measurement, Madre de Dios y Tumbes (1 each one), Tacna and Ica (3 each one) and San Martín (7).

From the total of emergencies, 285 were caused by natural events, such as: heavy rains (90), decrease of temperature (75), strong winds (36), earthquakes (17), landslides and floods (13 each one), collapses and surges (11 in each case), erosions (10), forest fires and huaycos (4 in each case) and a case of contamination.

During June 2025, SENAMHI registered meteorological frosts in 17 stations placed in the departments of Arequipa, Puno, stations placed in the departments of Arequipa, Puno, Tacna, Cusco, Junín, Pasco and Moquegua.

The stations that registered a greater number of days with frosts were: Imata, Pillones, Las Salinas, Crucero Alto, Macusani, Mazo Cruz and Bocatoma (30 days each one). Followed by Tisco, Cojata, Desaguadero and Chuapalca (29 days), Santa Rosa (28 days), Sicuani (25 days), Laive (24 days), La Oroya (15 days), Cerro de Pasco (13 days) and Ubinas (10 days).

The lowest temperatures were registered in Chuapalca (-23.5 °C), Mazo Cruz (-18.0 °C), Bocatoma (-15.0 °C), Pillones (-13.4 °C), Las Salinas (-12.4 °C), Imata (-12.2 °C), Santa Rosa (-10.4 °C), Macusani (-10.0 °C), Crucero Alto (-9.8 °C), Tisco (-9.7 °C), Laive (-8.9 °C), Desaguadero (-8.4 °C), Cojata (- 8.2 °C), Sicuani (-6.4 °C), La Oroya (-5.5 °C), Cerro de Pasco (-4.0 °C) and Ubinas (-1.8 °C).