It coats their windowsills and their washing. Some rural Wairoa residents think it might even be affecting their health. They are sick of the dust. Clouds of it billow across the hills on a windy day and each time a car, or truck, makes its way along the unsealed roads.
A petition calling for Kiwi Road to be sealed has attracted more than 240 signatures. It's one of the main alternative routes for stock trucks and holiday-makers.
This is the second time Kiwi Rd residents have petitioned, but they say they have also sent letters, emails and phoned Wairoa District Council.
Long-time Kiwi Rd resident Raymond Hawkins remembers more than 30 years ago when the first petition kick started the road's upgrade, but only portions of it were sealed.
"They left us out," Mr Hawkins says, wiping the thick brown film from his white mantle piece, something he has to do most days.
He says since moving back to the street he grew up on, he's done nothing but cough.