Lab report indexed
lab_report
45
max · 26%
A third-party lab report is present and indexed. This is the trust anchor for the rest of the water quality evidence.
Lab report statusSources
Scoring methodology
How water scores work
We surface Oasis-derived scoring evidence for bottled, sparkling, gallon, flavored and hydrogen waters. The headline score is normalized to 100, while each product page shows the exact rule contributions behind it.
2,735
water products scored
314
with indexed lab reports
48
marked no microplastics
Earned out of possible
The bottled-water rubric has 7 rules worth 171 possible points. The product earns points for evidence we can verify, then the final score is shown on a 0-100 scale.
Unknowns earn zero
Missing evidence is not filled in with a friendly guess. If a lab report, PFAS status, source or packaging detail is unknown, that part of the score gets little or no credit.
The rules
7 rules · 171 points possible
Contaminants
contaminants
50
max · 29%
Flagged contaminants reduce the score based on what was detected, the amount reported and the relevant legal or health guideline.
Ingredient rowsAmountsGuidelines
Water source
water_source
25
max · 15%
Natural mineral-rich sources earn more credit. Unknown, municipal or lower-confidence sources earn less or no credit.
Source type
Mineral preservation
heavy_ro_purification
17
max · 10%
Premium natural sources get dinged if heavy reverse osmosis appears to strip the minerals that made the source valuable.
Water sourceTreatment processFiltration methods
Packaging material
packaging
22
max · 13%
Glass and low-leaching packaging score better. Plastic-heavy packaging loses points because of microplastic and leaching concerns.
Bottle materialNo-plastic claims
Cap material
cap_material
7
max · 4%
Caps are scored separately because the closure can touch the water and has its own leaching profile.
Cap materialNo-plastic claims
PFAS testing
pfas_testing
5
max · 3%
A small explicit credit for products that disclose PFAS testing instead of leaving forever-chemical status unknown.
PFAS tested flag
Score ranges
- 90-100
- Exceptional evidence, clean contaminant profile and strong packaging/source signals.
- 75-89
- Generally strong, but with some tradeoff such as plastic packaging, missing PFAS testing or a few flagged minerals.
- 50-74
- Mixed evidence. Often missing testing, weaker packaging, source uncertainty or meaningful contaminant deductions.
- 0-49
- Low confidence or poor signals. Usually sparse disclosure, contaminant issues or many unknowns.
Why some products look different
Some sparkling or flavored waters expose penalty-style fields such as untested_penalty or packaging_penalty. We keep those on the product page when Oasis returned them, because they explain the actual score we scraped.
Nutrients and minerals are shown separately from contaminants. They help explain what is in the water, but the score still follows the breakdown returned for that product.