Police have been notified after a bucket full of bongs was collected at a public garden in Havelock North.
The finder, who did not wish to be named, but supplied a photograph, said the eight handmade cannabis-smoking devices were thrown into undergrowth beside the carpark in Keirunga Gardens.
They were later handed in to the Hastings Police Station.
The woman said she had noticed "carloads of youth parked up in the evenings and thought they were up to no good.
"It's disgusting that these disrespectful young people are using the much-loved property as a place to carry out their illegal drug activity and dump rubbish", she said.