Honest comparison
TapScore vs The Water Test.
Two tools, two jobs. TapScore (run by SimpleLab) is a comprehensive mail-in water analysis covering metals, hardness, pH, and, on certain packages, microplastics. The Water Test is a single-purpose at-home kit: $50, two tests, ~15 minutes per sample, Nile Red staining, particles you count yourself. Same chemistry as published microplastic surveys — packaged so a normal person can run it on a counter. Which one is right depends on the question you're trying to answer.
Side by side
| TapScore | The Water Test | |
|---|---|---|
| Format | Mail-in lab analysis | At-home kit, you run it |
| Scope | Multi-parameter (metals, pH, hardness, etc.) | Microplastics only |
| Tests per purchase | 1 per sample, 1 sample per kit | 2 tests per kit |
| Turnaround | 2–4 weeks | ~15 minutes active, ~75 minutes total |
| Method (microplastics) | Lab instrumentation (varies) | Nile Red fluorescent staining + 1 µm filter |
| Polymer identification | Available on premium tiers | No (requires py-GC/MS, ~$50k instrument) |
| Particle size floor | Down to nanoplastic on premium tiers | ~1 µm (the size class implicated in Orb Media data) |
| Cost | See mytapscore.com (varies by panel) | $50 per kit (two tests) |
| Best for | Comprehensive one-time baseline | Ongoing testing, filter A/B, brand comparison |
TapScore is a service of SimpleLab. Pricing and panel scope change; check their site for the current state.
When TapScore is the right tool
You've never had your water tested. A comprehensive mail-in panel is the right baseline. You get lead, copper, nitrate, hardness, PFAS (on the right tier), microbiology, and on premium tiers a microplastic count, all from one sample.
You want polymer-level identification. Distinguishing PE from PET from polystyrene requires py-GC/MS or micro-FTIR. Both are lab-only instruments. If the polymer identity matters for your decision (litigation, journalism, specific source identification), the lab is the only option.
You need a documented report for a third party. Landlord disputes, insurance claims, real-estate disclosures, municipal complaints — a lab PDF with a chain of custody is what those processes expect. An at-home count is for personal decision-making, not third-party adjudication.
When The Water Test is the right tool
You want to verify your filter. Two tests per kit: one for the tap input, one for the filter output. The delta is the actual removal rate at your house — not the manufacturer's lab claim. A mail-in lab would charge per sample and take weeks; the kit answers the question in an afternoon for $50.
You're comparing options. Tap vs the bottled brand you switched to. Bottled vs filtered. Your kettle vs your kid's baby bottle. Each comparison is one kit, side-by-side filters under the blue light. A lab workflow makes per-comparison cost prohibitive.
You want to see the particles yourself. A lab PDF tells you a number. The kit shows you the actual pink dots on the filter. For most people, the visual is what changes behavior — staring at the filter from a year-old bottle of SmartWater hits differently than reading a count in a report.
You're testing regularly. Anyone running more than a couple of samples per year is spending less on the kit than on lab fees, even before counting time saved.
Use both — that's the strongest play
Once. Run a TapScore panel for the full baseline. Then use the at-home microplastic test kit for ongoing monitoring of the one contaminant most regulators don't track and most filters don't claim to remove. The lab handles annual depth; the kit handles weekly visibility.
FAQ
Does TapScore test for microplastics?
TapScore offers microplastic analysis as part of certain mail-in panels and as a standalone add-on. The methodology is laboratory-based (a chemist runs your sample through a documented procedure and returns a PDF report). Pricing varies by package; the public price list lives at mytapscore.com. For an exact current quote on a microplastic-inclusive panel, check their site directly.
How is The Water Test different from TapScore?
Two different tools. TapScore is a full mail-in water-quality lab — heavy metals, hardness, pH, sometimes microplastics, all from one sample, delivered as a comprehensive report 2–4 weeks later. The Water Test is a single-purpose at-home kit: stain, filter, photograph plastic particles yourself in about 15 minutes for $50, two tests per box. TapScore answers "what's in my water across many categories?" The Water Test answers "how much plastic is in this specific sample, today, and how does it compare to that other sample?"
Which one is more accurate for microplastics specifically?
Both use established methods. A lab using gold-standard instrumentation (py-GC/MS, micro-FTIR) can identify individual polymer types and count particles below the 1 µm limit of a home kit. The Water Test uses Nile Red fluorescent staining — the same dye Mason et al. used in the 2018 Frontiers in Chemistry paper that found microplastics in 93% of bottled water — which counts particles down to about 1 µm by fluorescence. The lab is more precise; the at-home kit is more practical for repeat sampling and side-by-side comparisons.
Why not just always use a lab?
Cost and friction. A single lab sample at the microplastic-inclusive tier typically runs in the hundreds of dollars and takes weeks to come back. If you want to test your tap, your filter's output, three bottled brands, and your kid's formula bottle, that's five samples — orders of magnitude more expensive and slower than running them yourself for $50 a box. The lab is the right tool for a one-time deep dive; the kit is the right tool for ongoing visibility.
Can I use both?
That's the strongest play. Run a one-time TapScore-style comprehensive lab panel to baseline your water across all categories — metals, contaminants, microplastics. Then use the at-home kit on an ongoing basis to monitor the microplastic count specifically, verify your filter, check new bottled brands, A/B prep routines. The lab is your annual physical; the kit is your bathroom scale.
Is The Water Test peer-reviewed?
The method is. Nile Red fluorescent staining for microplastic detection was established by Maes et al. in Scientific Reports (2017) and used by Mason et al. (Frontiers in Chemistry, 2018) in the Orb Media bottled-water survey that found microplastics in 93% of bottled samples — that's the methodology the kit packages for home use. The product itself is a single-purpose consumer kit, not a clinical instrument.