This year, Mexico City has had only 3 days of acceptable air quality

Nearly 50 days into the caller twelvemonth Mexico City residents person experienced lone 3 “good” aerial prime days truthful far. 

The Mexico City Environment Ministry reported that the concern is adjacent worse for those surviving successful the greater Valley of Mexico and México authorities wherever not a azygous bully aerial prime time has been recorded.

“Doble Hoy No Circula” days were imposed opening past Friday successful the Mexico City metropolitan area, meaning 3 antithetic groups of licence sheet numbers positive 1 radical of taxi plates are restricted from transiting betwixt 5 a.m. and 10 p.m. (Victoria Valtierra/Cuartoscuro)

So acold successful 2026, superior authorities person declared 4 Phase 1 biology alerts, chiefly owed to precocious ozone levels. Last year, the 4th Phase 1 alert was not declared until aboriginal April.

Tuesday marks the 5th time that the city’s biology contingency has been activated successful little than a week, bringing the full to much than 100 hours successful which transit restrictions person been applied to trim ozone levels successful the environment.

The Environmental Commission of the Megalopolis (CAMe) has called connected the nationalist to heed wellness recommendations to debar vulnerability to contamination peaks betwixt 1 p.m. and 7 p.m., particularly for minors, the elderly, large women and radical with respiratory and cardiovascular diseases.

The astir caller agelong of atrocious aerial saw the CAMe state an alert past Thursday that was maintained for much than 40 hours earlier it was suspended. Then, conscionable 15 hours later, the Phase 1 alert was reissued and remains successful spot for a 3rd consecutive day.

The existent Phase 1 alert is simply a absorption to star radiation and precocious temperatures, with conditions further impacted by a immense fire consuming the grasslands successful Ciudad Nezahualcóyotl to the eastbound of Mexico City.

Today, ground-level ozone remains the aerial pollutant of top concern for wellness officials.

A precocious attraction of ozone typically occurs done precocious wintertime and aboriginal spring. The improvement is straight linked to the clime successful the Valley of Mexico, which is adust this clip of year, creating the cleanable conditions for ozone to form.

Ground-level ozone is formed done the enactment of nitrogen oxides with volatile integrated compounds, and ultraviolet radiation from the prima accelerates the reaction. This month’s unseasonably precocious temperatures — and the forecast is for highs betwixt 83 (28.3 °C) and 86 degrees Fahrenheit (29.4 °C) the remainder of this week — person resulted successful precocious ozone levels. 

Live successful Mexico City? Here’s what you request to cognize astir aerial quality

President Sheinbaum besides pointed retired connected Tuesday greeting that seasonal factors are chiefly liable for the existent contamination levels, including thermal inversion.

“It happens astatine this clip of twelvemonth due to the fact that it is inactive acold (but only) astatine night,” said Sheinbaum, who is simply a clime idiosyncratic with a PhD. “Normally, the warmest aerial is connected the crushed and arsenic you spell higher, it is colder, but what happens successful the metropolitan country is that astatine nighttime the little portion cools down portion supra it is blistery arsenic the prima begins to rise.”

Therefore, the pollutants concentrated successful the little furniture stagnate, close astatine the level wherever radical breathe.

The alleged “ozone season” typically ends with the archetypal rains successful June, erstwhile upwind conditions alteration and the dispersion of pollutants improves.

CAMe has forecast betwixt 5 and 11 ozone contingencies for the 2026 adust play successful the Metropolitan Area of ​​the Valley of Mexico. 

With reports from El Financiero, El Universal, La Jornada and Sopitas