POLLUTION levels in the North have dropped, with readings in nearly all provinces below maximum safety limits except for Mae Hong Son, Deputy Government Spokesman Maj-General Sansern Kaewkamnerd said.
Many areas in Thailand had heavy rainfalls yesterday.
After a teleconference yesterday of relevant agencies on haze in the North, Sansern said the situation had improved greatly and should be back to normal soon, thanks to co-operation of all agencies and getting members of the public to change their behaviour and make timely alerts about wildfires.
The Pollution Control Department said readings of small particulate matter up to 10 microns in diameter (PM10), as of 1pm yesterday, were 128 micrograms per cubic metre in Mae Hong Son's Muang district, followed by 117mcg in Mae Sot in Tak province.
Other northern provinces had readings under 70mcg.
Lampang Deputy Governor Mongkol Suksai said the authorities had fined three people who violated the ban on outdoor burning.
He said the Lampang Agriculture Office was instructed to gather data about corn farmers and those who grow crops that produce stubble - to get them to use the stubble to make fertiliser instead of burning it.
He said the province would work on preventing haze for the next season, from as early as October.