Managing Water Quality on Rural Land

Rural land sits at the head of most freshwater catchments. How land is managed — whether for farming, forestry, or lifestyle use — has a direct influence on stream health, water quality, and the condition of downstream rivers, estuaries, and coastal environments.

Managing water quality at the catchment scale helps:

protect freshwater ecosystems
support safe swimming and recreation
provide reliable stock drinking water
reduce pressure on estuaries and coastal areas
strengthen resilience to heavy rainfall and drought

Water quality improves most effectively when actions are coordinated across whole catchments, with landowners and communities working together upstream and downstream.

How Land Use Effects Waterways

A catchment is the area of land where rainfall drains into a stream, river, wetland, or estuary. Water doesn’t stop at fence lines — it carries sediment, nutrients, and bacteria from across the landscape.

On rural land, waterways can be affected by:

stock access to streams
runoff during rainfall events
erosion from slopes, tracks, and gullies
loss of riparian vegetation
earthworks or forestry operations

Managing these pressures upstream plays a key role in improving water quality downstream.

Understanding E. Coli & Water Quality

E. coli bacteria are found in the gut of animals, including humans. They can enter waterways directly when animals stand or swim in streams, or indirectly when faecal material is washed off land during rainfall.

While not all strains are harmful, E. coli is widely used as an indicator of water contamination. Elevated levels can signal the presence of other pathogens and can make waterways unsafe for contact recreation and stock drinking water.

An effective way to reduce E. coli entering streams is to fence and plant stream margins. Fencing prevents livestock from depositing faeces directly into waterways and reduces stream‑bank erosion. Maintaining long grass and planting riparian margins within fenced areas helps stabilise banks, slow surface runoff, filter contaminants, and reduce bacteria entering the stream.

Reducing E. coli levels relies on good land management across the whole catchment.

To see E.Coli levels in your catchment visit LAWA River Quality for Nelson

Good Practices That Protect Water Quality

Actions that help protect streams and rivers include:

fencing stock away from waterways
maintaining riparian vegetation along stream margins
managing runoff pathways and drainage
stabilising erosion‑prone areas
careful siting of yards, crossings, and tracks
maintaining ground cover during wetter months

These practices support water quality while also improving long‑term land resilience.

What We're Doing

Council supports catchment and water quality improvement through:

the Healthy Streams programme
freshwater quality and quantity monitoring and catchment assessment
erosion control initiatives (e.g. Hill Country Erosion Fund)
advice and support for rural landowners - Environmental Programmes Advisor
funding support and partnerships (e.g. Environmental Grants)
alignment with regional and national freshwater initiatives

Early engagement helps identify opportunities and avoid downstream issues.

What Can You Do

Every rural property is part of a catchment. You can:

protect streams and wetlands on your land
manage erosion and runoff pathways
take part in catchment or Healthy Streams projects
explore funding or planting support
talk with Council early about land management plans

Small actions, repeated across a catchment, deliver meaningful improvements.

Contact helathy.streams@ncc.govt.nz if you would like to speak to our Sustainable Land Manager.