Exposure trends
Read against the safe limit, never alone
Plotting against the 100% limit makes escalation visible without any arithmetic.
Canary sells at-home kits that measure what a household is actually breathing. The lab was already right; nothing between the result and the family was. I designed the consumer layer that turns lab-grade metals telemetry into a decision, across one summer.
Overview
Turn a lab-grade exposure report into four answers a household can reach in under a minute: am I safe, how is it changing, what is causing it, what do I do now.


Why a consumer layer
Every screen in this case study is a surface I created, not a restyle of one that already existed. Canary's lab pipeline was already accurate; nothing stood between that result and the family who paid for it.
The kit was sold to households and the output was written for laboratories. I designed the entire consumer layer that closed that gap.

Pain points
Imagine
You pay for a kit because your kid keeps waking up with headaches. Two weeks later a PDF arrives: sixteen components, four columns of statistics, units you have never seen. Nothing tells you whether that is normal, bad, or urgent.
Users were left to decipher unfamiliar units, thresholds, and risk levels alone. Without a translation layer, environmental health data does not just go unused, it gets misread.
Features overview
Six views shipped. Each one exists because research showed a household could not answer one of the four questions from the raw report.
Exposure trends
Plotting against the 100% limit makes escalation visible without any arithmetic.
Sensor ranking
Ranking by severity replaces the manual comparison users were doing by hand.
Metal thresholds
Every metal has a different threshold, so relative risk only reads once they are normalised.
Recommendations
Turns an exposure insight into one specific action, today.
Weekly heatmap
Surfaces the spaces that are consistently high risk rather than occasionally bad.
Risk composition
Composition beside alert volume, because overall risk needs both halves.
Process
The decisions behind the screens, and what settled each one.
Research. Moderated interviews, think-aloud walkthroughs, task-based evaluation, and behavioral observation.
Definition. The four questions, the six design principles, and the information architecture that came out of them.
Design. Flow, all six views, the visual system, and the handoff.
Weeks 1 to 4
Interviews and think-aloud sessions on the existing report, then the four questions.
Weeks 5 to 8
Flow mapping, the six principles, and low fidelity layouts argued against them.
Weeks 9 to 13
Mid fidelity, the visual system, and the six shipped views.
Research
Understand the reader, define the misreads, design the translation.
I leaned on real-time cognition over recall, because people cannot reliably report how they read a number. Watching someone open the report told me more than asking them about it afterwards ever did.
Who
How
What
Three findings, and all three of them contradicted the instinct to show more data.
Challenges
The report failed in three different ways at once, and each one needed a different instrument.
Numerical
Emotional
Behavioural
Ideate
Map the path, set the constraints, then draw.
I mapped the whole path from the kit arriving to the household changing something, so the six views could be argued about as one journey rather than as six screens.

The same path runs at the top of this page in the built product: risk first, the trend under it, and the recommendation attached to the reading that triggered it.
Six principles, written before any interface work. Every later argument about a chart got settled against them instead of against taste.
01
Measurements only matter against limits, comparisons, and trends.
02
Surface the most dangerous thing, not the complete dataset.
03
Interpretable in seconds, not minutes.
04
Communicate urgency without causing panic.
05
Every insight names the next best step.
06
Many sources should read as one story, not fragments.
Hierarchy got settled in grey boxes so that the visual pass was never asked to fix a structural problem.


Layout and reading order argued against the six principles, with nothing on screen that could win an argument by looking good.


Real data volumes, real label lengths, and the interactions that the risk ranking depends on.
The product
Every element on it exists to move someone from uncertainty to a plan, and everything above is the argument for why each one is shaped the way it is.
Reflection
Designing the first consumer surface on a working lab pipeline meant the hard problem was never the data. It was that the data was already correct and still not doing anybody any good.
What it taught me:
Context is worth as much as accuracy. Precise environmental data only becomes useful once it is grounded in benchmarks and reference points. The lab was never the bottleneck, and adding decimal places would not have moved a single household.
Action is what builds trust. Users were measurably more confident when an insight translated into what to do next. On a risk product guidance is not a nice-to-have, it is the product.
Reducing cognitive load reduces anxiety. Simplifying how information was presented improved both comprehension and follow-through. On a health product those turn out to be the same metric.