In the Klang Valley, API readings stood at 173 in Klang and Johan Setia, followed by Cheras (168), Putrajaya (165), Batu Muda (164), Banting (160), Shah Alam (159) and Petaling Jaya (154).PETALING JAYA: Twenty-seven areas across the country had unhealthy air quality at 8am today, with air pollutant index (API) readings in the Klang Valley on the rise.

Johor remained the worst-hit state, with Pasir Gudang topping the API list at 177, followed by Kota Tinggi (166), Larkin (164), Pengerang (162), Batu Pahat (154), Kluang (152) and Tangkak (151).

In the Klang Valley, API readings stood at 173 in Klang and Johan Setia, followed by Cheras (168), Putrajaya (165), Batu Muda (164), Banting (160), Shah Alam (159) and Petaling Jaya (154).