The Environment Agency (EA) is investigating reports of large-scale fly-tipping across Essex.
The EA said that lorry-loads of waste have been dumped regularly in some 20 locations across the county in recent weeks.
It has received reports that show fly-tipping has taken place in quiet locations such as farm tracks, entrances to sewage pumping stations and telephone exchanges off major roads including the A13, A130 and A127.
Areas around Chelmsford, Basildon, Brentwood and Canvey Island have been particularly affected.
It is believed these incidents began in the middle of August but recently have been happening much more frequently.
The waste dumped is around one or two lorry-loads in size and a mix of construction and demolition rubbish, with some household waste mixed in.
EA enforcement team leader Lesley Robertson said: “We have reason to believe these incidents may be linked due to the similarity of the waste type and deposit size.
“We are currently liaising with relevant local authorities, the police and those affected to gather further evidence.
“We urge anyone who discovers fly-tipped waste matching this description, or who has any information that may aid our investigation, to get in touch on our 24-hour incident number: 0800 80 70 60.”
Fly-tipping can carry a fine of up to £50,000 in a magistrates court or a custodial sentence.
- Pictures provided by the EA