How to choose a home water test kit? Start by deciding what you want to find out about your water. Different testing options are suitable for screening for bacterial growth, checking basic well water parameters, monitoring tap water and investigating several water quality parameters at once. A home water test can provide useful information about the parameters it measures, but a single test cannot determine whether water is safe to drink overall.
If you have concerns about water quality, a result is unusual, or you need a test result for an official purpose, laboratory testing may be the appropriate next step. Home water tests are particularly useful for monitoring water quality, checking specific parameters and assessing whether further testing may be needed.
You can explore the available options in the Testerit water test range. If you would first like to learn more about water quality and the factors that can affect it, see our guide to water quality testing.
How to choose a home water test kit for different situations
When considering how to choose a home water test kit, the most important question is what you actually need to measure. The comparison below helps you determine whether a bacteria test, well water test, tap water test, broader home test, individual parameter test or laboratory analysis is the most suitable option.
| Situation | Suitable option | What can it help you assess? |
|---|---|---|
| You want to screen drinking water or well water for possible bacterial growth | Drinking Water Bacterial Test | Screening for bacterial growth in approximately 48 hours. The result does not provide information about the chemical quality of the water. |
| You need a rapid preliminary screen for the presence of bacteria | 15-Minute Water Bacteria Rapid Test | A rapid bacteria screening test for applications specified by the manufacturer. |
| You want to check key basic parameters of well water | Safe Well Water Test | Hardness, alkalinity, pH, Fe2+ iron, nitrate and nitrite. |
| You want to monitor several tap water parameters | Safe Tap 9 Tap Water Test | Several tap water parameters with one test. |
| You want a more comprehensive home water testing kit | Complete Home Water Quality Test Kit | Bacteria screening together with several chemical and physical water parameters. |
| You want to check one particular water parameter | Individual water tests | Separate tests are available for parameters such as water hardness, manganese, nitrate and nitrite, and TDS. |
| You want more comprehensive testing than a home test and a written report | Water Analysis Service | Several water quality parameters are analysed from a sample and the results are provided in a written report. |
| You need results for regulatory or another official purpose | Approved drinking water laboratory | The required analyses can be performed using appropriate approved methods within the laboratory’s scope of competence. |
Choose a water test based on what you want to find out
Are you concerned about bacteria in the water?
A bacteria test can be a suitable first option, for example, if a well has flooded, surface water may have entered the well, the characteristics of the water have changed or the water has not been used for a long period.
The Drinking Water Bacterial Test is based on a culture medium. The water sample is added to the test bottle and the result is interpreted after approximately 48 hours based on a colour change.
The result applies only to the bacterial growth detected by the test. It does not provide information about pH, heavy metals, nitrate or other chemical properties of the water. A positive or unclear result should be confirmed with further testing.
If a faster result is needed, the 15-Minute Water Bacteria Rapid Test provides an option for rapid preliminary screening. The test should be used according to its instructions for use and for the applications specified by the manufacturer.
If there is still uncertainty about the microbiological safety of drinking water, the appropriate next step is laboratory testing and, where necessary, contacting the relevant local health protection authority.
Do you want to check the pH, iron, hardness or nitrate level of well water?
The Safe Well Water Test is designed for monitoring key basic parameters of well water. It can be used to assess:
- total hardness
- total alkalinity
- pH
- dissolved ferrous iron (Fe2+)
- nitrate nitrogen
- nitrite nitrogen
Safe Well does not include a bacteria test and does not test for every substance that may affect well water quality. It is therefore best suited for basic screening and monitoring of the specified parameters.
When interpreting nitrate and nitrite results, it is important to take into account the units used by the test and the interpretation instructions supplied with the product. If a result is unusual or close to an applicable limit value, the concentration should be confirmed by laboratory testing.
Do you want to check several tap water parameters?
The Safe Tap 9 Tap Water Test is intended for monitoring several tap water parameters with one test. It is suitable when you want preliminary information about several characteristics of tap water without carrying out a more extensive laboratory analysis.
The results apply only to the parameters measured by the test. Safe Tap does not include bacteria screening and cannot be used to assess overall water quality on its own.
Do you want a more comprehensive home water test?
The Complete Home Water Quality Test Kit combines bacteria screening with several measurements performed using test strips. It is suitable when you want to obtain an overview of several water parameters with one test kit.
A comprehensive home test can be useful when you do not yet know which water parameter may be associated with an observed change, or when you want to monitor several water parameters at the same time.
Even a comprehensive home test does not test for everything that may be present in water. If a result affects how the water will be used, causes concern or is used as the basis for a significant decision such as purchasing water treatment equipment, the relevant finding should be confirmed by laboratory testing when appropriate.
Do you only need to check one specific water parameter?
A comprehensive test kit is not always necessary. If you only want to monitor one specific water parameter, an individual test may be the most practical option.
The water test range includes individual tests for parameters such as:
- water hardness
- manganese
- nitrate and nitrite
- total dissolved solids (TDS)
An individual test is particularly useful when you already know which water parameter you want to monitor. However, the result only provides information about the parameter measured by that particular test.
Do you need a more comprehensive analysis and a written report?
With the Water Analysis Service, a water sample is sent for analysis and a written report is provided for the water parameters included in the service.
The analysis service is an option when you want a broader overview of several water parameters than a home test can provide. Check the current analyses included in the service on the product page before ordering.
If the test result is required by an authority, for regulatory purposes, a property transaction or another purpose with specific testing requirements, check the required analyses and laboratory approval in advance.
Home water test or laboratory analysis?
A home water test is a practical option when you want quick information about one or more specified water parameters. Laboratory testing is a better option when more detailed analysis is required or when the result will be used to make an important decision about the use or treatment of the water.
A home water test may be suitable when you want to
- monitor changes in water quality
- check a specific water parameter
- obtain a preliminary result quickly
- compare a result with an earlier measurement
- assess whether more detailed testing may be needed
Consider laboratory testing when
- a new well is being put into use or an existing well has been repaired
- the well has flooded or surface water or wastewater may have entered it
- the smell, taste, colour or turbidity of the water has changed noticeably
- a rapid test result is unusual or difficult to interpret
- you need to test for substances or microorganisms that the selected home test does not detect
- there is still uncertainty about the quality of the water
- the result is required for an official purpose
- the result will be used to make a significant decision about the use or treatment of the water
If you need a result suitable for official monitoring in Finland, check the requirements in advance and use a laboratory approved for the required analyses. See the Finnish Food Authority’s information on approved laboratories.
A practical guide to choosing your water test
If you are still unsure how to choose a home water test kit, use this quick guide to narrow down the options:
Choose the Drinking Water Bacterial Test when you want to screen drinking water or well water for possible bacterial growth and a result in approximately 48 hours is suitable for your needs.
Choose the 15-Minute Water Bacteria Rapid Test when you need rapid preliminary bacteria screening for an application specified by the manufacturer.
Choose Safe Well when you want to monitor the pH, hardness, alkalinity, Fe2+ iron, nitrate and nitrite of well water and do not need bacteria screening in the same test.
Choose Safe Tap 9 when you want to monitor several tap water parameters with one test.
Choose the Complete Home Water Quality Test Kit when you want bacteria screening together with several measurements related to the chemical and physical properties of water in one kit.
Choose an individual water test when you already know which parameter you want to monitor, such as water hardness, manganese, nitrate or nitrite.
Choose the Water Analysis Service when you want more comprehensive testing than a home test and a written report covering the analysed parameters.
Choose an approved drinking water laboratory if you need results for an official or regulatory purpose, or if water quality needs to be investigated more comprehensively than a home test allows.
Compare water tests and choose the right option
Understanding how to choose a home water test kit becomes much easier once you know which water parameter or possible problem you want to investigate. Compare Testerit water tests and choose the option that best matches your needs.
The range includes individual water tests, kits for testing several parameters and a broader water analysis service. Always check the product instructions, parameters measured, measurement ranges and result interpretation before testing.
If a result is unusual or you remain concerned about water quality, the relevant finding can be confirmed by laboratory testing when necessary. If you want more background information before selecting a test, read our water quality testing guide.
