But the government is set to deploy rainmaking planes to seed clouds by dispersing chemicals into the air to aid condensation.
The PCD was also in talks with the Royal Rainmaking and Agricultural Aviation Department about creating rain over the urban area.
As Thais woke up on Monday morning to another day of murky air blanketing its bustling construction-filled capital, environment group Greenpeace said Bangkok was now the 10th most polluted in the world, rivalling some cities in China.
Reasons for the persistent smog include combustion exhaust from traffic-strewn roads, the burning of fields by farmers outside the city, and pollutants from factories.
Air Quality monitoring websites aqicn.org and airvisual.com both pegged the capital's pollution at "unhealthy" levels on Sunday and Monday.
But the Pollution Department played down the dangers of the persistent haze, saying although the city's figure is high, "it is not a crisis yet".
The amount of PM2.5 - airborne dust particles 2.5 microns in diameter or less - exceeded the safe level of 50 micrograms per cubic metre of air along roads in 19 places.
Massive Overdose in Chico Leaves One Dead and Twelve Others Hospitalized
China has chose to list all the fentanyl-like substances as controlled substances and start working to adjust related regulations. For the most comprehensive local coverage, subscribe today. "We do respond to many, many overdoses", O'Brien said.
But Greenpeace's Thailand director Tara Buakamsri said immediate action should be taken by the authorities, such as reducing the number of cars and closing schools in high-risk areas.
Prime Minister Prayuth Chan-Ocha has urged those living in the Thai capital, Bangkok, to stay indoors as the city's air pollution reached unsafe levels. Also, people have been urged to stay indoors.
While the air quality has deteriorated to harmful levels over the past three days, Witsanu Attavanich, associate professor of economics at Kasetsart University said the situation was likely to remain at critical levels for no less than another month due to weather patterns and limited wind.
Bangkok's air pollution has been worsened to an alarming level, prompting many pedestrians to put on cloth masks to protect themselves and the authorities to launch rainmaking operations in the sky.
Air pollution is costing Britain hundreds of millions of pounds more in damage to health than ministers had previously admitted. For each of us, our health is unavoidably shaped by the environment we live in. Long exposure can cause respiratory diseases, including lung cancer, heart disease and stroke, he said.
The ambitious new strategy to clean up our air and save lives cites air pollution as one of the biggest threats to public health in the United Kingdom, behind only cancer, obesity and heart disease.