Valladolid maintains 'Situation 1, preventive' active of its Action Plan for air pollution after several days of high tropospheric ozone concentrations and the arrival of Saharan dust that worsens air quality.
The episode continues with high values in the municipal network and key thresholds have already been exceeded: the eight-hour limit of 120 µg/m³ has been exceeded for the second consecutive day, a step prior to 'Situation 2, warning' if a third day occurs.
What has happened and where it has been detected
From July 31st to August 8th, nine consecutive days are counted. with readings exceeding 100 µg/m³ at several stations in the Valladolid City Council's Air Pollution Control Network (RCCAVA), according to the Environmental Service. One of the stations will remain without data due to an incident unrelated to the network.
The City Council insists on minimizing the use of combustion vehicles. and prioritizing public transportation, especially during peak hours, to avoid congestion that would require stricter traffic measures.
Forecasts point to intense heat as ozone concentrations remain high: models estimate a probability of nearly 94% of exceeding the eight-hour threshold of 100 µg/m³ in the coming days, in a context of high temperature warnings reaching 39 ºC in the province.
Municipal plan forecast and thresholds
Tropospheric ozone is a secondary pollutant It is formed by photochemical reactions between precursors such as nitrogen oxides and volatile organic compounds emitted by traffic and certain industrial activities, under intense solar radiation.
The municipal plan activates 'Situation 1, preventive' with sustained exceedances of 100 µg/m³ in the network of stations and contemplates moving to 'Situation 2, warning' if the eight-hourly maximum value of 120 µg/m³ is exceeded three consecutive days, which would entail temporary traffic restrictions.
Particle and air quality episode
The intrusion of African dust has raised PM10 levels above 50 µg/m³ in all stations except the one near the Poniente Bridge, affecting a large part of the central peninsula.
Since this is a phenomenon of natural origin, no structural measures are adopted., although a possible moderate risk is warned for sensitive individuals, with a gradual decline expected over the weekend.
To better understand the effects of suspended particles during episodes of ozone pollution in Valladolid, you can consult this analysis on tropospheric ozone and suspended particles..
Response and requests from groups
Ecologists in Action call for escalation to 'Situation 2' and apply restrictions: closure to traffic in the low-emission zone, speed limit to 30 km/h on roads in the historic center with a 50 km/h limit, lane reduction, and priority to public transport.
The group also calls for increased bus service and the redistribution of bicycles. to absorb a potential increase in demand, while also highlighting the health impacts of ozone: respiratory irritation, worsening of cardiorespiratory pathologies, and effects on vegetation. In 2022, the EEA estimated between 75 and 130 premature deaths linked to this pollutant in Valladolid.
Tips and information channels
Risk groups and sensitive people (asthma, respiratory or heart disease, children, the elderly, and pregnant women): Reduce strenuous outdoor physical activity, follow your medication plan, and be alert to symptoms such as cough, sore throat, difficulty breathing, palpitations, or unusual fatigue.
For the general population, you can continue your normal activities with caution, avoiding exertion during the hottest hours and prioritizing public transportation. If symptoms compatible with this condition occur, it's advisable to reduce exposure and consult with healthcare professionals.
Real-time data monitoring is available on the Valladolid City Council website and on the free 'Vallaire' app, where alerts, recommendations, and the progress of the incident are updated.
Given the high temperatures and the presence of dust in the environmentAuthorities urge caution: limiting private vehicles, staying informed daily, and taking special care of vulnerable people can make a difference until levels return to normal.