27 Bottled Water Brands Failed: What the Report Actually Found

Between October and December 2024, a Pakistani government laboratory bought and tested bottled water from twenty cities. It was not a hasty exercise. It used standard published methods and reported a detection limit for every parameter.

Of 176 brands tested, 149 passed. That is 85 percent. The remaining 27 were found unsafe for human consumption.

The earlier version of this post reported those 27 brands and nothing else. It described the result as a silent health crisis and said the water posed severe risks including cancer, heart disease, kidney damage and nervous system disorders.

Those last claims do not come from the report. Here is what it actually found, and what each finding can support.

The products under test are brands sold in exactly this form. Ravitave, CC BY-SA 4.0, via Wikimedia Commons

What the report found

The testing programme is run by the Pakistan Council of Research in Water Resources, under the Ministry of Water Resources. It publishes a quarterly report on bottled and mineral water.

Sampling is the step everything rests on, and also the step most exposed to error. A contaminated bottle at the shop tells you nothing about the source water. Ashjaymohsin, CC BY-SA 3.0, via Wikimedia Commons

Figure	What it is
176	brands collected from 20 cities
149	brands that passed, which is 85 percent
27	brands found unsafe, which is 15 percent
16	failed on chemistry
16	failed on microbiology
5	failed both, so they are counted in each list
10 ppb	arsenic limit
50 ppm	sodium limit
10 ppm	potassium limit
0 per 100 ml	the limit for coliform bacteria

Figures from the PCRWR quarterly report for October to December 2024.

One arithmetic point matters more than it looks, and the earlier version of this post missed it.

Ten brands failed on sodium, five on arsenic and one on potassium. That is sixteen, which is exactly the report's chemical figure.

Sixteen brands also failed on bacteria. Sixteen plus sixteen is thirty-two, but only twenty-seven brands were named in total.

The difference is five: those five failed both a chemical test and a bacteriological one. A brand with arsenic in it and coliforms in it appears in two lists and counts once.

So the four lists do not divide the twenty-seven evenly, and adding the headings together will not give you twenty-seven.

The four findings, and what each one means

Bacteria: the part that genuinely matters

Sixteen brands failed the microbiological test. The permissible limit is zero coliforms per 100 millilitres, so any detection at all is a failure.

Escherichia coli under scanning electron microscopy. The report tests for total coliforms, fecal coliforms and E. coli. CDC and Janice Haney Carr, public domain, via Wikimedia Commons

Fecal coliforms and E. coli are indicators that water has been in contact with fecal matter. That is the one finding on this list with acute consequences.

Cholera and typhoid are both waterborne, and this is a real risk if the water is drunk regularly over time. The earlier version of this post was right to name them, and this is where its alarm was earned.

Coliforms are counted by growing them on agar. Any positive result exceeds the limit, which is zero. HansN, CC BY-SA 4.0, via Wikimedia Commons

Arsenic: serious in kind, smaller than it sounds

Five brands exceeded the arsenic limit of 10 parts per billion. The measured values were 16.72, 14.43, 12.76, 12.49 and 11.01 parts per billion.

Native arsenic. Arsenic is classified as a Group 1 carcinogen, which is why these five brands are the serious part of the report rather than an incidental detail. Aram Dulyan, public domain, via Wikimedia Commons

So the exceedances run from ten percent over the limit to about sixty-seven percent over. They are real, and arsenic is genuinely carcinogenic.

But the health evidence for arsenic builds up over years of drinking contaminated water, not over a bottle. This report is one quarter of sampling.

The World Health Organization sets its arsenic guideline at 10 parts per billion, provisionally, on grounds of what treatment plants can reliably achieve.

The earlier version of this post listed "skin diseases and cancer" as outcomes of drinking these brands. The cancer part is a real concern for arsenic in general. Attaching it to this specific quarterly finding, at these concentrations, was not supported.

Sodium: mostly a taste and labelling question

Ten brands exceeded the sodium limit of 50 parts per million. The measured values ran from 54 to 100 parts per million, and one brand in Karachi hit exactly twice the limit.

A sodium chloride lattice. The World Health Organization sets no health-based guideline value for sodium in drinking water at all. Materialscientist, CC BY-SA 3.0, via Wikimedia Commons

This is where the earlier version of this post went furthest wrong. It listed "high blood pressure" and "heart disease" as consequences.

The WHO sets no health-based guideline for sodium in drinking water. Most bottled water contributes a small fraction of a day's sodium intake next to food.

The genuine concern is narrower: a person who drinks several litres a day for years, and who is already salt-sensitive or hypertensive, may be unwise to choose a high-sodium brand. That is worth knowing. It is not the same as bottled water causing heart disease.

Potassium: the finding that needs the most care

One brand exceeded the potassium limit, at 11.2 parts per million against a limit of 10. That is a twelve percent exceedance, the smallest margin anywhere in the report.

Potassium metal reacting violently in water, which is not what was measured. The report found dissolved ions at 11.2 parts per million, something a healthy kidney excretes without difficulty. Firetech117, CC BY-SA 3.0, via Wikimedia Commons

The image above is not what the laboratory found. What it found was dissolved potassium ions in drinking water.

For a person with healthy kidneys, that is not harmful. Potassium in food is routinely far higher, and the kidneys handle it.

There is a real risk, and it is specific. It applies to people with chronic kidney disease, and to patients taking certain drugs including ACE inhibitors and spironolactone.

The WHO also sets no health-based guideline for potassium in drinking water. The limit here is a Pakistani standard, not an international health threshold.

Listing "kidney damage" as a general consequence was wrong in a specific way: it is people whose kidneys are already impaired who need to check this label.

What the earlier version left out

The single biggest omission is the number that makes this report calibrated rather than alarming.

One hundred and forty-nine of 176 brands passed. The failure rate was fifteen percent. That is a real regulatory failure worth acting on, and it is not a situation in which most people are drinking poison.

A second omission is why there is such a large market for bottled water at all.

Chemical contamination of a drinking water supply. Most bottled water exists because of a problem like this one, not because the bottled alternative is better. Susan E. Amrose, Katya Cherukumilli and Natasha C. Wright, CC BY 4.0, via Wikimedia Commons

How contamination moves from the surface down into groundwater. This is the context the earlier version omitted entirely. CAWST, Center for Affordable Water and Sanitation Technology, CC BY 2.0, via Wikimedia Commons

The PCRWR report opens by saying the poor quality of piped drinking water has forced a large section of the population to buy bottled water instead.

So the honest framing is two failures, not one. Piped water is unreliable enough to push people toward bottles. A minority of the bottles are then not fit to drink either.

That is a reason to keep testing quarterly. It is not a reason to describe the result as a silent health crisis.

Refilling a large jug. This is where branding is weakest: the label names who bottled the water, not who filled the jug. Myke2020, public domain, via Wikimedia Commons

The regulatory machinery, which the original got right

The original version of this post described how enforcement works, and that part was accurate. It is worth keeping.

PCRWR runs the tests and reports failures to PSQCA, the Pakistan Standards and Quality Control Authority, which does the licensing. Provincial authorities also have a role.

The report itself sets out permissible limits in three columns, for WHO, the International Bottle Water Association, and the Pakistani standard.

Many parameters carry the notation NGVS, meaning no guideline value set. That is a deliberate gap rather than an oversight.

The structural weakness the original identified is real too. A quarterly cadence cannot catch a batch that went bad last week, and a brand can reopen under a new name.

Staffing limits on monitoring were raised in the same coverage, by PSQCA. The original version of this post reported that companies denied the findings and some refused to comment.

Key Terms in Plain English

These are the words in this article that would send you to a dictionary. Each one is given here the way it is actually used above.

Term	What it means
PCRWR	Pakistan Council of Research in Water Resources. The body that tests bottled water and publishes quarterly results.
PSQCA	Pakistan Standards and Quality Control Authority. It issues the licenses PCRWR reports against.
APHA	American Public Health Association. Its standard methods are what the laboratory used, at the 24th edition.
Parts per million	A mass ratio of one gram per litre of water. Used for sodium, potassium and dissolved solids.
Parts per billion	A mass ratio of one milligram per litre. Used for arsenic, where the limits are far tighter.
Coliform	A group of bacteria used as an indicator of contamination. The permissible limit is zero.
Fecal coliform	Coliforms that indicate the water has met fecal matter, which is the serious version.
NGVS	No guideline value set. A deliberate gap, not an oversight.
IBWA	International Bottle Water Association. Sets a mineral water standard alongside WHO and the national one.
Exceedance	How far a measured value sits above its limit. Oslo water was at twice the sodium limit.
Arsenicosis	The chronic skin and neurological condition linked to long-term arsenic exposure.

Terms used above, in roughly the order they first appear.

Key Takeaways

• The report is real and the numbers check out: 176 brands, 149 passed, 27 failed, across 20 cities.
• Ten sodium plus five arsenic plus one potassium equals the sixteen chemically unsafe brands, and five brands failed both kinds of test.
• Bacteria is the only finding with acute consequences, and its limit is zero coliforms per 100 millilitres.
• Arsenic exceedances run from 10 to 67 percent over the limit. The cancer risk is real but belongs to chronic exposure, not to one bottle.
• The WHO sets no health-based limit for sodium or potassium in drinking water. High potassium matters for people with impaired kidneys.
• The earlier version of this post called the water harmful and listed diseases the report does not support.

Frequently Asked Questions

Is bottled water from these brands dangerous to drink?

The report says unsafe for human consumption, which is a regulatory judgment against a numeric limit. It is not the same as a finding that the water causes disease.

Of the four categories, bacterial contamination is the one with genuinely acute risk, because the limit is zero.

Which is the most serious finding?

Bacteria first, on immediacy. Arsenic second, on severity if exposure is sustained for years.

Both are real. The sodium and potassium results are the mildest and were the most overstated.

Why do the four lists not add up to 27?

Because five brands failed both a chemical and a microbiological test, so they appear in two lists and are counted once in the total.

Ten plus five plus one gives the sixteen chemically unsafe brands, and sixteen failed on bacteria.

Should I stop drinking bottled water?

That is a personal decision about risk, and this article cannot make it. It can say which findings are urgent and which are not.

The brands on this particular list were tested once, in one quarter. The next quarterly report may show different brands entirely.

Can you tell the quality of a bottle from the label?

Only partly. The label identifies the brand and the bottling company, but not the source water or the date of filling.

That is why periodic independent testing exists at all, and why the quarterly programme is worth having even when it finds what it found this time.

Key references
• PCRWR Quarterly Report: Bottled Water Quality, October-December 2024
• WHO Guidelines for drinking-water quality, 4th edition
• WHO background document for total dissolved solids in drinking-water
• Arsenic in drinking water: WHO chemical fact sheet
• Bottled water
• Escherichia coli
• Groundwater contamination

Images: Wikimedia Commons, with the author and license named in each caption. Labelled figures are taken from the PCRWR quarterly report cited above.