It is a problem that has occurred several times in Māpua over the last few years.
Schruer said the blockages take several hours to clear and are costly as the pumps must be craned out, pulled apart, cleared, reassembled and reinstalled.
Each blockage incurred a cost to ratepayers.
New sewerage pumps were installed during a major upgrade of the Māpuainfrastructure last month and Schruer said there are concerned the clothing blockages could permanently damage them.
Engineers know the area the garments are coming from but cannot pinpoint the exact property.
Schruer said if residents suspected it was member of their family, to please speak to them and point out the problem they were causing.
Anyone concerned it was a neighbour, could contact one of the Tasman District Council's wastewater engineers in confidence.
"In the meantime, please remember the sewage system is for wastewater only, clothes and rags should be disposed of by other means."
- RNZ