Wellington's mayor says questions can come later on who'll pay to fix the failed Moa Point wastewater treatment plant.

The facility's failed catastrophically and wastewater's still flowing into the ocean - with no end in sight.

Work's continuing at the site to lets teams assess what's gone wrong.

Andrew Little says regional Wellington mayors have been quick to comment on whether they'll help pay.

But he says those decisions haven't been made.

"At the end of the day, Moa Point plant belongs to Wellington City Council - it's our responsibility. We need to get it fixed and up and running, we don't want to quibble about who's paying." 

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