What the data shows
A summary of independent, peer-reviewed research on drinking water quality in Spain — and why common responses to it fall short.
What We Offer
47%
of Spain’s population is supplied from a water body that fails the EU basic quality standard
3000+
municipalities exceed the new safety threshold — most still technically “legal.”
300mg/L
typical hardness in Valencia, Murcia, Alicante. Filters alone don’t stop it.
332
municipalities supply water above the legal nitrate limit. Not borderline — over it.
The studies behind these numbers
Rural areas carry the highest risk – and the least monitoring
Two decades of national registry data show non-compliance clusters in rural municipalities, which are also least likely to report data at all. So, the data that ís collected is the ‘good data’.
SPAIN WIDE STUDY – 2025
Tap, bottled or filtered – the health gap is larger than assumed
Neither tap water nor bottled water is the safe choice people assume. Filtration is the only option that meaningfully reduces both health risk and environmental impact.
HEALTH STUDY – 2026
Bottled water sold in Spain often contains more microplastics than tap water
Laboratory testing of Spanish bottled water brands found microplastic concentrations exceeding typical tap water levels.
LAB ANALYSIS – 2024
Municipal nitrate and hardness data, mapped nationwide
The official, publicly searchable registry behind nearly every Spain-specific figure in this research — verifiable by anyone, for any municipality.
OFFICAL DATABASE SPAIN – 2026
Low-mineral drinking water linked to cardiovascular risk
Long-term mineral-stripped water intake is linked to higher cardiovascular risk — a reminder that no single solution is risk-free.
COHORT STUDY – 2022
Reverse-osmosis systems can regrow bacteria without upkeep
A 35-year-old finding still cited today: without upkeep, filtration systems can become a source of bacterial growth rather than a barrier against it.
MICROBIOLOGY – 1989
Droughts and extreme rainfall measurably affect water disinfection by-products
Fifteen years of Barcelona water treatment data show that droughts and extreme rainfall directly affect disinfection by-product levels in tap water. This influences the general quality of the water.
CLIMATE STUDY – 2025
Nitrate and trihalomethane (THM, chloride) exposure linked to gastric cancer risk
A large Spanish case-control study linking long-term nitrate and trihalomethane exposure, which are chlorines, in drinking water to gastric cancer risk. In Spain, nitrates are sometimes too high.
CASE STUDY – 2022
PFAS “forever chemicals” found in both tap and bottled water in Catalonia
PFAS, microplastics and related precursor compounds detected in tap water from a treatment plant and in bottled water in south Catalonia.
PFAS STUDY – 2024
OUR SCIENCE-BASED-SOLUTION
One system. Six stages. Proven results.
VERAQ exists to give people permanent access to clean, healthy water they can trust .
Science shows that individual water treatment steps each solve part of the problem — filtration, softening, carbon adsorption, UV disinfection.
On their own, none of them solve all of it.
VERAQ combines all six into a single validated system, engineered so nothing is left half-addressed. One system. Six stages. Proven results — for families, hotels, offices, and industry alike.
Why Choose Us
Built for every setting
From family homes to hotels, offices, and industrial operations — one validated system that scales with you.
A permanent fix
No more replacing bottles or cartridges every few weeks. Install once, and the system keeps working for you.
Local installation & support
From first consultation to ongoing maintenance, our team is there — not a product you’re left to figure out alone.
Common questions about this research
In most of Spain, no — official reporting shows the large majority of tap water technically meets EU legal limits. But “legal” is a minimum bar, not a guarantee of ideal quality. A newer, stricter precautionary nitrate guidance (6 mg/L) is already exceeded by over 3,000 municipalities, even though most of them remain within the older, less strict legal limit.
Not really. Modelled research found bottled water carries a cancer risk nearly identical to tap water, while producing roughly double the carbon footprint. Tested Spanish bottled brands have also been found to contain microplastics and, in some regions, the same PFAS compounds found in tap water.
It’s the strongest single option – cutting health risks by 80% – but it isn’t free of trade-offs. Reverse osmosis strips beneficial minerals from water, and long-term intake of mineral-stripped water has been linked to higher cardiovascular risk, amongst other health issues. Reverse osmosis systems can also regrow bacteria if they aren’t properly maintained.
Both. Some findings apply accross Spain – like the national reporting gap, where rural municipalities are both the least monitored and the most likely to exceed limits. Others are regional: elevated hardness is common along the Mediterranean coast, which are also salty rich waters. PFAS has been specifically documented in south Catalonia.
All studies are either peer-reviewed academic research or official government registries (SINAC, Spain’s national drinking water database). None are industry-funded studies. Every claim on this page links directly to it’s original source.
Partly a data problem: the municipalities most likely to have quality issues are also the least likely to report data, which keeps the scale of the issue officially understated. Partly an infrastructure problem: fixing source water and distribution networks nationwide is slow and expensive — which is exactly the gap point-of-use treatment is built to close in the meantime.