Residents in remote WA communities have urged the State Government to fix their drinking water supplies, some of which have been contaminated with deadly bacteria and chemicals for decades.

Dozens of communities are becoming increasingly reliant on bottled water, among them Pandanus Park, 120 kilometres east of Broome.

Community leader Patricia Riley said residents only found out last year the high levels of nitrate in the community's bore-water could potentially kill a baby.

"It made me concerned because I was using the tap water and I could have been killing my grandson and I didn't even know about it, that I could actually suffocate his body," she said.

"Just fix our problem please. We're not animals, we're humans. We want to drink healthy water, and clean, pure water."

Pandanus Park is not the only WA community with major concerns about its water supply.

The extent of the problem was detailed in an auditor-general's report released in May last year.

The review of service delivery in remote communities found that of WA's 271 Aboriginal communities, more than a dozen had enough nitrate in their water supply to cause the potentially fatal condition blue baby syndrome.

It also found four communities had above the recommended level of uranium in their tap water, and 76 had water contaminated with E. coli or Naegleria microbes, both of which can cause sickness or death.

Pandanus Park chairwoman Anna Cox said the situation would not be tolerated in non-Indigenous towns.

"If it were not Aboriginal people ... the Government would crack onto it as soon as something gets out of hand, whereas Aboriginal people have to suffer the consequence and be left in the dark," she said.

Some improvement recorded: Housing Authority

There is evidence the quality of water supplies is improving in many communities.

The Housing Authority conducts monthly water testing at all 84 communities which receive State Government funding for essential services.

The authority said there had been a "marked reduction" in the number of failed water quality tests from 136 in 2012-2014 to 73 in 2014-2016.

It said it was taking a number of other steps to mitigate the risk to residents, including delivering bottled water to 15 communities.

But the water is only provided for bottle-fed infants under three months old, which medical experts have identified as the most at-risk group, and supplies evaporate quickly with many other residents preferring the taste and safety of bottled water.

The Pandanus Park community wants access to clean drinking water. ( ABC Kimberley )

The Housing Authority delivered almost 1,000 bottles of water to Pandanus Park in March, and while it was to have lasted for eight months, it was all gone within two weeks.

The authority's general manager Nigel Hindmarsh pointed out that remote community infrastructure was, until last year, the responsibility of the Federal Government.

"Poor water quality in some communities fundamentally reflects inadequate infrastructure, an area for which the Commonwealth Government was primarily responsible for until it walked away from its longstanding obligations in 2014," he said.

Remote community servicing comes under the portfolio of Housing Minister Colin Holt, who was this week too unwell to be interviewed.

Labor's child protection spokesman Stephen Dawson said all West Australians should have access to clean, safe water.

"I'm hearing from people in remote communities who are very concerned, who've come across unexplained illnesses, mouth ulcers and a range of other illnesses," he said.

The State Government is currently reviewing the viability of WA's 271 Aboriginal communities, starting with an audit of services and infrastructure in each location.

No decisions have been made about the fate of the communities, but the Government confirmed this week that existing funding arrangements would continue for at least another year.