DIAMOND BAR (CBSLA) — The South Coast Air Quality Management District's annual "Check Before You Burn" season begins Monday and continues through Feb. 28.

Air quality regulators will declare "No-Burn Days" when home fires could lead to unhealthy air.

"Smoke from residential fireplaces is a significant source of PM2.5 (particulate matter) during the winter months in the South Coast Air Basin," Wayne Nastri, AQMD executive officer, said in a statement. "Residents can do their part to improve air quality by spreading awareness and choosing not to burn wood when No-Burn Days are announced."

On a No-Burn Day, wood-burning will be banned for 24 hours in residential fireplaces, stoves or outdoor fire pits.

Last winter, 25 No-Burn Days were declared.

Information on the restricted days is available on www.aqmd.gov/cbyb or on the AQMD's mobile phone app.

(© Copyright 2021 CBS Broadcasting Inc. All Rights Reserved. City News Service contributed to this report.)