Archive for the 'Stormwater' Category

Stormwater in the Auckland Plan

October 5th, 2017

Stormwater on Auckland Isthmus
Stormwater is a heritage problem that no one wants to pass to the next generation.

  • Stormwater transports sediments and heavy metals in harbours and creeks, contributing to declining wild life / water quality
  • Created by hard (impervious) surfaces like roofs and roads
  • Normally dealt with by local pipes, wetlands etc – Auckland has good standards in ‘green-fields’
  • In parts of Auckland the stormwater infrastructure and pipes are from the 19th century
  • Worst problems include Auckland roads – generate 50% of stormwater including heavy metals.  Next, soakage to the aquifer on Auckland isthmus [Auckland’s largest underground water source – should be pristine… untreated stormwater is now soaking in as no stormwater pipes or treatment are in place].  Lastly Combined sewers (also on the Auckland isthmus) where stormwater shares a pipe with sewage. Existing pipes are inadequate for stormwater volumes, sending untreated sewage and stormwater into back yards; flooding creeks; destroying habitat; and polluting bays and harbours when it rains.
  • Unitary plan will raise impervious surfaces on the isthmus from 42% to 62% – our harbours simply cannot cope without a major retrofit of poor / non existent stormwater infrastructure where Auckland plans “brown-fields” development

Actions needed

We want all our Councillors to vote for 21st century stormwater in the Auckland plan
– Auckland Plan refresh to contain aspirations and plans for water infrastructure (similar to those for transport]
– Long term plan to include “ring fenced” water funding for stormwater improvements on the Auckland isthmus

Invitation  – if you are on Auckland Isthmus and have a concern about stormwater then please contact us and we can join you up  with other groups. Your help will make a difference.  

What do we propose?
Water can no longer be a buried problem

– Auckland Council has under invested in stormwater – especially relating to combined sewers and soakage.
– Clean water infrastructure must receive the same planning, funding and attention in the Auckland plan that is being given to transport.
– People living on the Auckland isthmus need similar standards to what is being built as Auckland expands into green-fields – the old stormwater infrastructure is a health risk.          – There is an urgent need for local stormwater treatment systems to clean up the problems before discharge to water ways; stormwater has been found to be as damaging to streams and marine environments as coliforms are.

What is the issue?

  • Auckland Council has spent money previously budgeted for stormwater upgrades on other things
  • Auckland Council has a ‘debt ceiling’ – ie a limit on the money they can borrow (and spend).
  • Unless we as citizens stand up for clean water in our harbours this pattern of neglect is likely to continue.  See STEPS in Our Auckland

What is happening now?:
– Auckland council has high-risk beaches / locations with ongoing water quality issues, where swimming or recreational water activities are not recommended at:
• Cox’s Bay • Meola Reef • Weymouth Beach • Little Oneroa Lagoon • Wairau Outlet • Piha Lagoon • North Piha Lagoon • Wood Bay • Laingholm Beach • Te Henga (Bethells) Lagoons. (We would add  • Onehunga Lagoon and inner Manukau Harbour also). Clearly pollution is not just an urban issue; our west coast beaches have been affected by failed on-site waste-water plants.
– The “Safe Swim” program later this year will alert people to this situation when the council is required to forecast and publish the quality of beach water.
– Auckland Council has a visual simulation model which shows what happens now after a sewerage overflow: the sewage sits in the water, tides go in and out and it remains… it takes a long time to ‘flush out and is dangerous to ecological and human health meanwhile.

STEPS recently joined with Manukau Harbour Restoration Society, SASOC, Friends of Oakley Creek in a stormwater presentation to the Auckland Council Environment and Community Committee (starts 29 minutes into  live stream.   See also our  Stormwater slides and additional photos).

What is the plan?

For the isthmus, Watercare plans a central interceptor; a 13 kilometre long wastewater tunnel that will run from Western Springs to the Mangere Wastewater Treatment Plant (MWTP). It is intended to provide for future growth of Auckland, and reduce overflows to the Waitemata and Manukau Harbours from some areas. Estimated cost approximately $1 billion. [Watercare Asset Management Plan has a total $4.2 billion forecast for much more extensive wastewater infrastructure work across Auckland 2016-36. However Watercare CEO has stated that the wastewater system is only an interim solution for stormwater issues, providing some time for Auckland Council to construct adequate stormwater infrastructure for combined sewer areas.]
Additional work is required to treat stormwater, and Council is still to approve this. It may include some sewer separation and some local treatment to reduce the volumes of stormwater flowing through the sewers.  Best evidence treatment for stormwater is available, has been locally piloted and implemented  successfully. Treatment is different from flooding control – it can be done progressively.

Who will benefit from clean Auckland Harbours?
Yachties, swimmers, families and citizens generally would not have to deal with the sanitary items and E-coli counts that regularly show up on Auckland beaches, parks and in the water. So most Aucklanders and many other New Zealanders would gain from treating and separating stormwater.

SASOC have written more extensively on this topic.

We believe the costs for improving stormwater infrastructure could be in the order of $1 billion. Watercare have already designed the Central Interceptor. However if Auckland Council cannot remove the large volumes of stormwater going to MWTP then future Aucklanders may have to pay Watercare Services to build an entire new waste treatment plant which could be $ billions. Stormwater treatment is an essential investment. We believe it should be included in the Auckland Plan refresh and long term plan (LTP).

Funding: Auckland politicians have mentioned a ‘targeted stormwater rate’
– The benefit of having a targeted water rate is that it can ONLY be spent on stormwater – it cannot be dissipated on lifestyle spending

Who should pay?
Weighing up costs and priorities is  always a question of what we value, and our priorities. We are asking what we as NZers value about our urban environments so we propose:

  • Aucklanders who enjoy beaches and water recreation
  • Urban Aucklanders as the main road users (since heavy metals and oil and the largest amount of stormwater come from roads)
  • Watercare waste treatment (urban) customers.
  • Any Government which cares about the health of people in NZ’s largest city, about clean water, or about safe housing intensification would also consider special purpose vehicles (SPVs) like Government bonds for urban NZ to ‘catch up’ with its water infrastructure

Nation-wide water infrastructure includes: Drinking water, Waste Water and Stormwater with associated benefits to streams, harbours and ground water. Let’s remember that 86% of NZers live in cities and towns… and no one wants the next generation to be facing this unacceptable situation.

Auckland Stormwater and Health

August 19th, 2017

This week STEPS joined with Stop Auckland Sewage Overflows Coalition, and Manukau Harbour Restoration Society in speaking with Counicllor Penny Hulse, Chair of Environment & Community Committee, and Councillor Chris Darby, Chair of Planning Committee to  demand Auckland Council action on Auckland isthmus STORMWATER, in the Auckland Plan and the Financial 10 Year plan being prepared this year. If we miss out it will be another 1-3 decades before we have another chance!

STEPS and SASOC are delighted that Cr Hulse appeared in the media today talking about the problem and some solutions.  Coinciding with this it was announced last night that an Auckland public health study is being carried out. “The Auckland Regional Public Health Service has begun a study into why it is seeing the increase in diseases like Cryptosporidium and the potentially serious E coli (VTEC)…Medical officer of health David Sinclair said it ordinarily saw between 60 and 75 cases a week, but after a big storm that number was consistently higher than 80. The public health service would work with Auckland University, NIWA, Auckland Council and Watercare on the study.” And Local Government Minister Anne Tolley launched a ministerial review into three waters – drinking, storm and waste water. Can these really be first steps to Auckland Council and Government acknowledging we have a problem?

Our messages were:

  • Address ecological and human health risks in the “Auckland Plan refresh”, including:
    – A funding stream in the Long Term (10 Year) Plan, committed to improving stormwater
    systems (combined sewers and soakage areas) on the isthmus over no more than 20 years
    – A Chapter on Water in the Auckland Plan, showing the connectedness of people and water                                 as a strong base for action on infrastructure
  • Incorporate community input and ally with interested community groups
    now, before options are fixed in the Healthy Waters  Western Isthmus Water
    Quality Improvement Plans, to increase community support of options in the LTP process

We have been very concerned that AC Healthy Waters and Watercare appear to be working behind closed doors and producing another technical solution before the public is aware. We believe that investing even more Auckland money in extensions/ renewal of the “combined” sewage and stormwater system is taking us back to the 19th century.


  • the Unitary plan will add 2 sq kilometers of impervious surface to Meola catchment alone
  • we understand that 75% of the polluted stormwater overflows in our parks come from the ROAD system.

More housing and more motorways mean more stormwater loaded with heavy metals off cars and mixed with raw sewage… is this a recipe for “livability” and “swimmability” in 21st Century Auckland?

Waititiko Meola flows through Chamberlain Park

July 17th, 2017

Recently STEPS was approached by some people wanting to “save Chamberlain Park”, which we found means primarily they want to retain the 18 hole golf course.

New Zealand has more golf courses per capita than any other country in the world (over 400 for a population of 4 million).  The Auckland Golf Facilities Investment plan March 2016 says there are 39 golf courses in Auckland, and 85% of Auckland golf courses are 18-hole courses like Chamberlain Park. They say around 8% of people play golf, mostly older Europeans. However Chamberlain Park is one of a very few public courses with affordable fees in Auckland. Apparently about 50,000 rounds of golf are played there each year. Participation in golf is forecast to be declining rather than increasing.

Chamberlain Park is about 32 Hectares in size with an open stretch of Meola creek running through it. This is a very large green space in Albert Eden (which we understand has the least open space per capita in Auckland); in effect fewer than 50,000 people per year access this space. Albert Eden has a population of more than 95,000 people and Auckland Council tells us that 60.6% of Aucklanders engage in walking.

In 2014 the Albert Eden Local Board proposed a Chamberlain Park Redevelopment Plan (AC) which is causing controversy. The plan proposes that the golf course is reduced to 9 holes, and various other changes made to allow public access to Chamberlain Park. Proposals for change have at their heart the idea of encouraging more people to use Chamberlain Park without having to play golf. Councillor Fletcher’s view was reported in NZ Herald 2015, and subsequently the Chair of Albert Eden has published his vision for the park.  The Greater Auckland blog site has published several perspectives including this Thought piece by an Auckland commentator.  There are also many articles in mainstream media outlining opposition to the AELB proposal by groups who represent the status quo.

STEPS wants to see public walking access to Meola Creek, and ecological improvements such as streamside planting, to reduce the temperature of the water and increase the biodiversity. We also want to see restoration of some wetlands. These were drained during development of the golf course.

With 49% impervious surface, and large parts of the Meola catchment reliant on ‘soakage’ (ie no stormwater pipes), open space and especially wetlands will be essential to the Auckland Council’s plan to develop Meola catchment to 62.5% impervious (that is 27% more concrete and roof area than we currently have).  It is well known that Meola Creek has the biggest sewage/ stormwater overflows in Auckland (see pictures here).

STEPS has previously submitted to Albert Eden Local Board asking the board to value every square meter of open space under their charge.  People say “they don’t make land any more”, and we know that open space in Albert Eden is especially limited. With a view to the future (say 100 years) – we proposed they treat all open space as ‘conservation’  land, with a renewable license to sports organisations and others who should act to enhance the conservation value of the land. [By contrast we note that one of Auckland Council’s nearby tenants destroyed the remaining fragments of rock forest on their large ‘patch’ of land in the past 3-5 years.] We recommended no more reduction of open space area. This means justifying every road, every building and every hard surface we wish to put on open space, since they all add to the impervious surface and loss of ‘natural’ open space.

STEPS wants to see ecological enhancement, more wetland and more biodiversity on this open publicly owned space.  We want to see a thriving stream, and we want Aucklanders to be able to enjoy it.  This means granting public walking access – part of a ‘mountain to sea’ walkway from Owairaka Mt Albert to Te Tokoroa Meola Reef. We look forward to understanding whether this requires a 9 hole course or can be achieved with the current 18 hole course. STEPS will support creek and wetland restoration efforts.

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