ReferenceItems / Water Test Strip
Item reference / Water testing

Water Test Strip

Where testing strips come from, how to take a sample, and when an old result must be replaced.

Water testing equipment and a water label at the Probably Stolen shop counter
Water testing at the counter
On this page

Quick reference

Get it
Water Merchant starting supplies or the Water Trading unlock package.
References: Water Test Strip
Use
One fresh sample per unused strip.
References: Water Test Strip
Readout
Sample purity, grade and label; not a component breakdown.
References: Water Test Strip

Stock and availability depend on your run.

Take a measurement#

  1. Open the testing kit if the strips are stored inside it.
  2. Use an unused strip on a nonempty liquid container.
  3. Read the result, then use those measured inputs in the calculator.
References: Water Test Strip

After mixing or treatment#

A used strip reopens its original sample. It cannot test the changed mixture again. Use a new strip or AquaScan after pouring, filtering or purification.

References: Water Test Strip

Testing and labeling are separate#

A test does not automatically fix a mismatching label. Check the actual reading and the container label separately before deciding what to sell. For individual contaminants, use AquaScan.

References: Water Test Strip
Reference notes

Sources

Reviewed Nov 3, 2026