Reporting
Sample reports
Every parameter we test, reported the way we report it. Two complete examples — a full drinking water analysis and a paired filter performance analysis — laid out on A4 exactly as issued, with analysis performed by accredited specialist partner laboratories.
Drinking water
Full Drinking Water Analysis — Westminster, London
A complete as-supplied analysis of mains drinking water from a central London property, covering every parameter group in our testing catalogue.
- Determinations
- 68
- Exceedances
- 0
- PFAS sum
- 10.5
- Hardness
- 278
Individual parameters reported
Against applied reference values
ng/L of a 100 ng/L guideline
mg/L CaCO₃ — classified hard
Summary
The sample met every statutory and guideline reference value applied in this report. Hardness is high, chlorination by-products and trace PFAS were measurable but well below guideline values.
- 68 determinations; no result above an applied statutory or guideline value
- E. coli, coliforms and enterococci all absent in 100 mL
- PFAS sum of 20 compounds: 10.5 ng/L against a 100 ng/L guideline
- Total THMs 31 µg/L against a 100 µg/L limit
- Lead 1.9 µg/L against a 10 µg/L limit — plumbing-derived, first-draw dependent
- Hardness 278 mg/L CaCO₃ (hard); microplastics detected at 1.4 particles/L
Filter performance
Filter Performance Analysis — Domestic Water Jug Filter
A paired influent and effluent analysis of a standard activated-carbon jug filter, challenged with the same Westminster mains water characterised in our tap water report.
- Chlorine
- 94.7%
- THMs
- 80.6%
- Lead
- 84.2%
- PFAS sum
- 41.9%
Free chlorine reduction
Total trihalomethane reduction
Reduction from 1.9 µg/L
Partial reduction of 20-compound sum
Summary
The cartridge substantially reduced chlorine, chlorination by-products and lead, partially reduced PFAS and microplastics, and had limited effect on nitrate, fluoride and dissolved salts.
- Free chlorine reduced 94.7%; total THMs reduced 80.6%
- Lead reduced 84.2%; copper reduced 79.0%
- PFAS sum reduced 41.9% — long-chain compounds outperform short-chain
- Microplastics reduced 78.6% (1.4 → 0.3 particles/L)
- Nitrate, fluoride, sulphate and chloride essentially unchanged
- Hardness reduced 21.9%; not a disinfection device — colony count rose slightly
What every report contains
Sample details
Where, when and how the sample was taken, and the condition it arrived in.
Plain-language summary
What the results mean, before any table is read.
Full result tables
Every parameter with unit, result, detection limit, reference value and method.
Reduction data
For filter reports, paired influent and effluent results with percentage reduction.
Technical observations
Context on why a result reads the way it does.
Scope statement
What the report does and does not say.