Rules in plain English
Farm dairy effluent in the Waikato: permitted conditions and what to check on a dairy farm
Updated November 2026
Doug Wakelin, Rural/Lifestyle Sales Consultant, Property Brokers Te Awamutu
General information only. Check with your solicitor and the council before you rely on it.
Short answer. Waikato dairy effluent systems must meet the permitted activity rules in the Waikato Regional Plan, the national freshwater regulations and the stock exclusion regulations, every day of the year. If a system can't meet those conditions, it needs a resource consent. A buyer should check sealing, storage, loading rates and any inspection history before settlement.
What the council says
| Topic | What applies | Source |
|---|---|---|
| Rules that apply | Waikato Regional Plan permitted activity rules (3.5.5.1 and 3.5.5.2), the national freshwater regulations (NES-F) and the Stock Exclusion Regulations 2020. Systems must comply 365 days a year. | Waikato Regional Council, effluent management, checked 2 Nov 2026 |
| Loading on land | Maximum 25 mm depth per application and 150 kg nitrogen per hectare. Ponding after application is unlawful. | Same page |
| Storage sealing | Storage must be sealed to the specified standard (1 x 10-9 m/s) so groundwater isn't contaminated. Council is asking for certification and recertification of clay-lined and earthen ponds. Industry guidance suggests retesting every five years. | Same page |
| Storage size | There's no set council rule for days of storage. It must never overflow and must let you defer irrigation when soils are saturated. A designer or effluent WoF assessor can size it. | Same page (FAQ) |
| Feedlots | All feedlots (cattle kept 80 days or more in any six months and fed by hand or machine) need a resource consent under the NES-F. | Same page |
| Stock holding areas (feed pads, stand-off pads, wintering pads) | Must meet NES-F regulations 12 and 13 and Waikato Regional Plan rule 3.5.5.2, or need a consent. | Same page |
| Odour | No objectionable odour or discharge beyond the property boundary (rule 6.1.8). | Same page |
| New ponds | Earthworks, damming or diversion may need consents. A building consent is needed if the dam would exceed 20,000 cubic metres and 3 m depth. Check district council rules too. | Same page (FAQ) |
Who's responsible
Waikato Regional Council says the owner is more likely to be liable if the infrastructure supplied to staff can't comply. When you buy, or when you start as a share milker, assess the system and be confident it's fit for purpose.
Buyer's checklist for a dairy or dairy support farm
- Get the effluent management plan, if there is one.
- Ask for pond sealing certification and the date of the last test, especially for clay-lined or earthen ponds.
- Ask for any council inspection reports, warnings or abatement notices.
- Check the storage against the herd size, and ask how it coped in the last wet autumn and winter.
- Check irrigator coverage, setback distances and any wetlands or drains near spreading areas.
- Check any feed pad, stand-off pad or wintering area is consented or meets the permitted conditions.
- Ask whether the dairy company supplier requirements have been met.
- Ask your solicitor to check consent conditions that would transfer to you.
Fonterra shares and supply
Whether a farm comes with Fonterra shares, or what supply arrangements apply, is a financial and contractual matter. Real Estate Authority guidance says agents shouldn't advise on it. Ask an authorised financial adviser, your solicitor and Fonterra directly.
Check before you rely on this
General information only, not legal advice. Rules are being reviewed (see freshwater farm plans and PC1). Check with your solicitor and Waikato Regional Council.