We provide wastewater collection, treatment and disposal for the residents and businesses of urban communities in Ōtaki, Waikanae, Paraparaumu and Raumati.

We own and maintain more than 21,000 connections and 5,400 access chambers to 350 kilometres of sewers, which handle a volume of 4,700 million litres per year. Our role is to:

  • provide reliable, affordable and environmentally acceptable wastewater collection and disposal systems for the urban communities
  • ensure that these systems protect public health and safety as well as the environment, and that they are adequate to meet present and future needs.

24 hour emergency number: 0800 486 486

Wastewater connection/alteration

If you're installing new wastewater (sewer) connections for new or existing properties or subdivisions, you'll need to complete the form below.

Please note: Section 459 of The Local Government Act 1974 allows the Council to require a private drain to be connected to the public drain unless it is more than 60m from the public drain. Clause G13.3.3 of the Building Code states: Where a sewer connection is available the drainage system shall be connected to the sewer and the connection shall be made in a manner that avoids damage to the sewer and is to the approval of the network utility operator.

Wastewater services

We use a computerised monitoring and control system to manage all treatment plants and pumping stations, except for very small pump stations and those with very high storage capacities, which are monitored manually. All major pump stations have emergency standby generators.


Ōtaki is served by 31 sewage pumping stations which discharge water into the Ōtaki Wastewater Treatment Plant. View information about the Ōtaki Wastewater Treatment Plant.


The communities of Waikanae, Paraparaumu and Raumati are served by a single wastewater treatment plant in Paraparaumu, which was upgraded in 2001-2002. At that time the oxidation ponds at Waikanae were closed and all Waikanae wastewater pumped to Paraparaumu for treatment.

There are 15 pumping stations in Waikanae and Paraparaumu and Raumati communities are served by 105 pumping stations. The Paraparaumu Wastewater Treatment Plant operates a Biological Nutrient Removal process, one of the most advanced treatment processes in New Zealand.

Resource consents were granted for 20 years and expire in 2021. View information about the Paraparaumu Wastewater Treatment Plant. 

Paekākāriki and rural areas

The community of Paekākāriki uses septic tanks. Rural areas of the District rely on on-site disposal, septic tanks or community package wastewater treatment plants.

Planning for the future

We'll need to invest in the Paraparaumu wastewater treatment plant in the coming years to meet the projected growth in the District and renew aging equipment that's been in service since the earlier upgrades. A study was carried out in 2015-17 to assess the condtion and capacity of the plant and plan out the works required to maintain its performance now and into the future.

Sewers (also referred to as drains, wastewater drains, foulwater drains)

We provide a network of sanitary sewer mains in the urban areas. A building is connected to the sewer by a 100mm lateral. The lateral is in two parts. The length from the sewer main to the property boundary is owned and maintained by the Council. The length from the building to the boundary is the responsibility of the property owner. These pipes meet and are connected at the inspection point which is located at or near the boundary.


My drain’s blocked – what do I do?
If you have a blocked drain, call a plumber/drain clearer (look under 'Drainage' in the Yellow Pages or on Google).  All plumbers known to the Council have been informed of the procedure to follow when called to a blocked drain.

The procedure for the plumber is:

  • Expose the inspection point on the boundary and check to see if it is clear or blocked. If it is clear or blocked at the inspection point, a plumber can clear the blockage - the owner pays for this. 
  • If the drain is blocked downstream of inspection point it is the Council’s responsibility and the drain clearer must call the Council. A Council serviceman will come immediately and clear the blockage. 
  • If the plumber cannot find the inspection point after two hours, they are to notify Council - 04 296 4700.
  • If the correct procedure is followed and the drain was blocked downstream of the inspection point, the Council will pay the plumber (a $250 maximum applies).
  • If the procedure is not followed the Council will not accept any costs and the property owner is responsible for paying the drain clearer.

Be prepared: locate a drain clearer (look under 'Drainage' in the Yellow Pages or on Google), and add their contact number to your list of emergency contacts.  It's a good idea to discuss costs before agreeing to any work.

Related links

Standard Drawings - wastewater