The war against illegal dumping and littering has been stepped up with fines starting on Wednesday, February 1 for those who flout the state's new litter laws.

February 1 marked the end of the grace period From now on, those who litter or illegally dump their rubbish can expect to be fined.

Those caught littering can face fines from $200 to $4000 (if contested in court) and those illegally dumping rubbish will face fines from $1600 to $100,000 (if contested in court).

Environment Minister Vicky Darling that since the introduction of an online reporting system last year where people witnessing illegal littering could report it, 386 reports of littering and illegal dumping had been received and issued advisory notices to 299 people.

"Simply record what you saw, when and where, and note the vehicle registration and any other details about the vehicle you can provide then complete the online form on the DERM website [www.derm.qld.gov.au/waste]," she said.