Preparations for the event were near complete, North Delhi Municipal Council (NDMC) officials said, adding that a large crowd is expected at the swearing-in.
Apart from sprucing up the maidan, NDMC has decorated the venue with fresh flowers and potted plants.
"We have already prepared the ground, and now we are decorating the venue with potted flowers. Since the weather has changed today with a drizzle in the morning, arrangements for cover will be taken up by the General Administration Department. The ceremony was supposed to be in the open, so no cover has been put up yet," a senior NDMC official said.
Mann said crowd management and security at the venue would be handled by Delhi Police.
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"We are also providing parking facility. DJB is providing drinking water tankers... Considering our handling of crowds during Anna Hazare's rallies earlier, it should not be a problem," Mann said.
The PWD has painted pavements and road-dividers on the periphery of the maidan. CATS ambulances will also be stationed at the venue, he said.
Two senior police officers from D B Gupta Marg and Kamla Nagar police stations expressed confidence in handling the crowd and on security arrangements.
The ministers to take oath, along with Kejriwal, are Manish Sisodia, Rakhi Birla, Somnath Bharti, Saurabh Bhardwaj, Girish Soni and Satendra Jain.