The Conversation

  • Written by Ian Wright, Senior Lecturer in Environmental Science, Western Sydney University

Many Australians take it for granted we can drink untreated tap water, without worrying about the health effects.

However, a recent audit criticised the regulation of pollution in the massive Warragamba Dam drinking water catchment, the biggest single metropolitan water reservoir in Australia.

Read more: Why does some tap water taste weird?

The Auditor-General’s report found that the NSW Environmental Protection Agency (EPA) was not effectively regulating water pollution in drinking water catchments. The report mentioned WaterNSW, which is the authority that supplies the majority of Sydney’s water needs. The report concluded that responsible bodies like the EPA and WaterNSW need to work together more effectively to protect Sydney’s water from pollution.

Problems in the Warragamba Dam, which is surely the most regulated and monitored water supply in the country, raise the issue of regional water quality.

Sydney’s salinity is rising

The audit was triggered by an independent triennial review of Sydney’s water supply (in which I participated), which was completed last year.

One of the issues we identified was rising salinity in Warragamba Dam. Although Sydney’s water supply has relatively low salinity by Australian standards, the level in Warragamba Dam (measured as electrical conductivity) was about twice that of other, smaller storages.

when Australian water goes bad Median results from storage reservoir sampling sites collected over the 2013-16 review period. Red bar indicates median value was above the audit guideline. Sydney Drinking Water Catchment Audit 2013-2016

Coal mines in the Warragamba catchment are a major source of salinity. The Springvale mine is the largest, and it disposes a large volume of wastewater to the catchment. I have been very concerned about the impact of this coal mine discharge on water quality for many years.

Read more: Is your drinking water safe? Here's how you can find out

The Springvale mine’s current discharge licence permits more than 10 Olympic swimming pools of saline waste water to be released daily into the Warragamba catchment. The waste water from Springvale has a salinity level eight times higher than that of Warragamba Dam.

Regional water problems

If pollution is allowed in such an important water supply, what is happening to your local water supply?

Read more: We asked five experts: do I have to drink eight glasses of water per day?

Currently there are several water supplies in Tasmania that have “boil water” alerts. Boil water alerts indicate that harmful pathogens could be present in the water supply, and it should be boiled for at least a minute before drinking.

In some communities in Western Australia the water supply is tainted by contamination that is not managed by simply boiling it. High nitrate levels in tap water have been reported from some communities, such as Meekatharra, a small township 700km northeast of Perth that relies on groundwater.

High levels of nitrates in the water cannot be easily treated, and are particularly dangerous for infants. When drunk by babies it can affect their blood oxygen levels and cause a disease called blue baby syndrome. Western Australia’s Water Corporation recommends that babies under three months do not consume the water, and bottled water is recommended for young babies.

Water in Katherine, in the Northern Territory, has been contaminated by toxic and persistent chemicals used in firefighting foam. The toxins have accumulated in the groundwater. Many other communities across Australia have also been similarly affected.

Uranium has also been reported in some remote community water supplies from the Northern Territory. Alarmingly, uranium levels were above Australian drinking water guidelines, and there are no clear guidelines for managing the problem.

These examples from regional communities reinforce the importance of preventing contamination from entering water supplies.

It is worth remembering that 20 years ago protozoan pathogens from the Warragamba supply resulted in several boil water alerts across Sydney.

Read more: Six ways to improve water quality in New Zealand's lakes and rivers

The NSW Auditor-General’s report found serious issues in how the EPA manages water pollution in Sydney’s drinking water catchments. For example, much of the data used by the EPA was self-reported by industry sources.

It may be surprising to many Australians that our water quality varies so wildly across the country. Our pollution watchdogs need to be strengthened and resourced properly so they can protect our most fundamental resource.

Authors: Ian Wright, Senior Lecturer in Environmental Science, Western Sydney University

Read more http://theconversation.com/better-boil-ya-billy-when-australian-water-goes-bad-99451

Politics

Scott Morrison at Australia-Israel Chamber of Commerce

QUESTION: I suppose one question I'll ask is about the role of social media, YouTube, Facebook. And the sort of thought process that we’re having as a nation of how we can create that sort of societ...

Scott Morrison - avatar Scott Morrison

Delivering the rail links Western Sydney needs

The Morrison and Berejiklian Governments will ensure the Western Sydney International (Nancy Bird Walton) Airport has a metro rail line in time for its opening.   The Prime Minister said his Gover...

Scott Morrison - avatar Scott Morrison

Nancy-Bird Walton immortalised at Western Sydney Airport

Australia’s biggest aviation project will honour one of the nation’s trailblazing stars of the sky.   The $5.3 billion Western Sydney Airport will officially become Western Sydney International (N...

Scott Morrison - avatar Scott Morrison

Business News

How to optimize your blog posts for SEO

Getting noticed on the Internet can be difficult if the blogs and articles that you put a lot of effort into aren’t optimized for SEO. Google is one of the leading sources that people use to find in...

Kyle Moore - avatar Kyle Moore

Why you should consider ditching your PR agency and doing it yourself

A new online platform is making running your own PR campaigns easy for small business owners and entrepreneurs – and it’s much more affordable than engaging a high-priced PR agency. The right media...

Jules Brooke - avatar Jules Brooke

Hideaways Bins

Small New Zealand company with big Australian presence wins international design award…for a rubbish idea How often do you think about the humble rubbish bin in your kitchen? For one family-run Kiw...

Hannah Parr - avatar Hannah Parr

Travel

Have An Unforgettable Vacation in Orlando

Family-friendly with unique theme parks, Orlando, Florida is the place to go for an unforgettable vacation. Head to the beach, spend time in Disney World, and visit The Wizarding World of Harry Pott...

News Company - avatar News Company

Airports and Customs in Australia: Everything you need to know to discover the country by plane

Australia is such a huge country that the beginning of air travel represented a very important step in the development of the country and communication among its citizens. Before air travel, it took...

News Company - avatar News Company

The Gold Coast is famous for fun but it is also famous for horrible traffic issues

The Gold Coast is a great place for a holiday but there are problems that tourists need to be aware of. The Gold Coast airport is a busy place. Thousands of visitors arrive every day from around the ...

Holiday Centre - avatar Holiday Centre