Farms and on-farm processors (dairies, abattoirs, piggeries, feedlots, packhouses, wineries) fall under Section 21 of the National Water Act, administered directly by DWS.
Depending on volume and effluent quality, a farm either needs a full Water Use Licence (WUL) and it must be registered with DWS.
Most farms we work with come to us already managing effluent in some way — a pond, an irrigation system, sometimes both. The problem is rarely that nothing's being done. It's that what's in place was built to handle volume, not to meet an audit standard or a licence condition.
A few things we consistently see:
A pond or dam that looks fine can still fail an audit. Visual capacity isn't the same as effluent quality — SIZA and GlobalGAP assessors test BOD/COD and pathogen indicators, not just whether the system is overflowing.
A General Authorisation has limits, even if you've never had a problem. Operations often don't realise they've drifted outside their permitted limits until an inspection flags it — by then it's a compliance issue, not a maintenance one.
Odour is usually the first visible symptom, not the actual problem. By the time neighbours are complaining, the underlying organic load has usually been building for a while.
Retrofitting is almost always more practical than replacing. Most of what we do works with existing ponds, dams, or irrigation systems already in place — the aim is to fix what's there, not start over.

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