Along Wellington’s south coast, warning signs appear after heavy rain:
“Avoid the beach.”
“No swimming.”
“Do not collect seafood.”
“Untreated wastewater.”
It is that final phrase that deserves closer attention.
“Wastewater” is a technical term. It refers to everything that leaves homes and businesses via the sewer network - toilet waste, greywater, sometimes stormwater infiltration.
But when untreated wastewater overflows into coastal waters, what does that mean in plain language?
Often, it means untreated sewage.
Human effluent.
The difference is not scientific. It is communicative.
Why the Softer Word?
Councils use “wastewater” because it aligns with the infrastructure system - wastewater treatment plants, wastewater pipes, wastewater overflows. It is administratively correct.
“Sewage” feels harsher. It provokes an immediate reaction.
But when a public sign advises avoiding contact because of untreated discharge, clarity matters more than comfort.
Evidence before emotion.
Public Health Is the Issue
Untreated discharge can carry pathogens such as E. coli, Campylobacter and other enteric organisms. That is why the advice is strong: avoid swimming, avoid seafood collection.
Recreational users are not reading engineering reports. They are deciding whether to enter the water.
Language should reflect the reality of the risk.
Public resource, public responsibility.
Words Shape Trust
There is no need for alarmism.
But there is a need for plain speaking.
When untreated human waste reaches the sea, the public should not have to translate institutional terminology to understand the hazard.
Technical accuracy and transparency are not mutually exclusive.
If it is untreated sewage, say so.
Because trust depends not just on infrastructure upgrades - but on honest communication about what is actually in the water.
