Here you can find out everything about the Klar2O water laboratory

About the Klar2O Water Laboratory

1. What is the Klar2O Water Laboratory?

Klar2O is an innovative company focused on the precise and reliable analysis of water samples. As specialists in microplastic and PFAS detection, we offer our customers transparent and well-founded results to ensure water quality in private households and in industry.

Thanks to our own state-of-the-art water analysis laboratories and cooperation with accredited partner laboratories, we deliver precise test results in the shortest possible time. Our customers can rely on simple, understandable and professional water analyses that help them to identify potential risks such as microplastics and harmful chemicals at an early stage and to take targeted action.

With Klar2O, it is possible to test water quality in any environment quickly and easily – without any expert knowledge. This gives you the certainty you need to protect your health and make decisions on a sound basis.

2. The Klar2O Lab

Klar2O is one of the leading companies in the field of water analysis. With our expertise in the analysis of microplastics, PFAS, and other pollutants, we always offer our customers precise and reliable results.

By using state-of-the-art technologies and innovative analysis methods, we ensure consistently high quality of our laboratory results. We work closely with accredited laboratory partners to guarantee the highest standards in analysis quality.

Our process, from sampling to the digital provision of your analysis report, is optimally tailored to your needs. To provide you with particularly understandable and practical reports, we deviate from the formal requirements of DIN EN ISO/IEC 17025 in the presentation of results. Therefore, our overall process is not accredited.

For official or judicial use of analysis results, such as for investigations according to the Drinking Water Ordinance, accredited sampling or a qualified person is required. If you only want to carry out an initial check, we recommend a Klar2O analysis as a quick and cost-effective start.

3. How to reach Klar2O

To avoid longer waiting times, we recommend taking a look at our FAQ.

There you will find answers to many frequently asked questions.

For example, if your question is "How do returns work?", simply check the relevant FAQ section to quickly find the right answer.

If you don't find an answer to your question, you can contact us at any time via the contact form. We usually respond within 24 hours.

If you wish to speak with us in person, you can reach us Monday to Friday between 09:00 AM and 05:30 PM at +49 155 65 81 71 43. Please note that in individual cases, longer waiting times may occur.

Here you will find everything about our water analyses and our instructions.

Water Analysis Kits

1. What is included in the analysis kits?

Your Klar2O water testing lab kit usually contains the following items:

  • Sample containers for collecting the water sample
  • Illustrated instructions for carrying out the test
  • A return label for sending the sample
  • Adhesive tape for securely sealing the shipping box
  • The shipping box in which you received the test kit is also needed for the return shipment

With these items, you can quickly and easily collect your water sample and send it back to us.

2. I have received my analysis kit. What should I do now?

Performing the sampling:

  1. Turn on the tap and let cold water run.
  2. Fill the sample container to the brim with cold water.
  3. Immediately close the container with the lid.

Sending in the sample:

  1. Place the filled sample containers back into the shipping box.
  2. Close the box with the enclosed adhesive tape.
  3. Attach the enclosed return label visibly.
  4. Hand over the package to a shipping service provider.

All our analysis kits have no expiry date if stored properly.

3. Something is missing from my set, what should I do?

Step 1: Have your order number ready

Step 2: Send an email to wasserlabor@klar2o.de (including the missing item)

Step 3: Reshipment will be initiated

4. My return material is missing

For environmental reasons, we do not use plastic bags and ask you to use the shipping box you received to return your sample.

5. My analysis kit is damaged – what should I do?

Same procedure as above:

Email to wasserlabor@klar2o.de with order number → Replacement will be sent.

Order & Shipping

1. When will my analysis kit be delivered?

Usually within 1–3 business days after shipping confirmation.

Shipment may be left with neighbors, in the mailbox, or at a pickup station.

2. How can I change my delivery address?

By e-mail to wasserlabor@klar2o.de (account change is not sufficient).

3. Can I track my shipment?

Yes, via the link in the shipping confirmation email or via DHL.

4. Can I send multiple samples to the lab together?

Basically yes - except for microplastics & PFAS, as these are analyzed separately.

Payment

1. What payment methods are available?

  • Credit Card
  • PayPal
  • Instant Transfer / Klarna
  • Invoice

2. Where can I find my invoice?

By email after the order has been dispatched.

Return to sender

1. How long does the return shipping take?

1–3 business days with DHL (shipping ideal: Mon–Wed).

2. Has my sample arrived at the lab?

You will automatically receive an email notification.

3. Is the shipping material sufficient?

Yes, everything is included.

4. Where do I send my sample?

At the Bruchsal site or partner laboratory (address on label).

5. When should I send the sample?

Between Monday and Wednesday.

Order

1. How do I order an item?

  1. Select product
  2. Check shopping cart
  3. Enter address
  4. Complete order

2. What data is required?

  1. Salutation
  2. First and Last Name
  3. Address
  4. Email

Cancellation & Returns

1. How can I exercise my right of withdrawal?

As an end consumer, you can revoke your contract within 14 days of receiving the order confirmation.

However, revocation is only possible if the sample containers are unopened.

The containers are sealed with a security sticker (sticker between the lid and the container) – once this is broken, a return is excluded.

Please send us your revocation form in writing either together with the return shipment or via our email address wasserlabor@klar2o.de. Please address the return shipment to:

Klar2O Wasserlabor

Werner-von-Siemens-Str. 2-6, Gebäude 5108

76646 Bruchsal

Germany

Upon receipt and inspection of the goods, we will refund the invoice amount to you immediately, at the latest within 14 days, using the original payment method.

For payments made by bank transfer, please also provide us with your bank details.

Sampling & Evaluation

1. How do I get my test report?

Upon completion of the analysis, your test report will be conveniently sent to you by email to the email address on file.

In addition, depending on the option chosen, you will also receive the report by mail to your specified shipping address.

2. When will I receive my inspection report?

Processing time begins once your sample is received at the lab and is typically:

  • 4–7 business days for standard analyses
  • 7–15 business days for PFAS analyses
  • 5–6 weeks for microplastic analyses (due to the increased analytical effort)

If you choose the express option, the processing time will be shortened according to the selected analysis.

Please note that processing is carried out exclusively on business days (Monday to Friday).

Once your results are available, you will be automatically notified via email.

3. I have exceeded the limit – What should I do?

Should your water analysis reveal exceedances of limit values or irregularities, we will provide you with all relevant information clearly laid out directly in the test report.

In addition, you will receive concrete recommendations for action that will help you to correctly classify the results and derive suitable measures.

If you have any further questions, you can contact us at any time for individual advice.

4. Can the scope of analysis be changed or extended?

It is unfortunately not possible to rebook the analysis parameters once they have been booked or to add individual parameters afterwards.

This is not possible for technical reasons.

5. Why do I not receive my inspection reports at the same time?

If you have ordered multiple analyses, the results may not be sent at the same time.

This is usually due to different analysis durations or because individual samples fall into different examination cycles.

Your results will be sent to you separately by email after each analysis is completed.

6. How understandable is the audit report?

Your inspection report is clearly structured and presented in an easily understandable way, even for non-specialists.

All results are clearly presented and explained, so you can see at a glance whether there are any anomalies.

In addition, you will receive concrete recommendations for further action.

7. What does "conspicuous" or "exceeded" mean?

"Conspicuous" means that a measured value deviates from the usual or recommended range, but does not necessarily exceed a limit value.

"Exceeded" means that a value is above a defined limit or guideline value, and therefore action may be required.

In your test report, such values are clearly marked and comprehensibly classified – including concrete recommendations for action.

8. Can you recommend any measures?

Yes, based on your analysis, your test report will provide you with specific and individually tailored recommendations for action.

These will help you understand possible causes and implement suitable measures to improve water quality.

If you have any further questions, please do not hesitate to contact us at any time.

9. Can I get a personal consultation?

Yes, we would be happy to offer you a personal consultation.

You can reach us by phone at +49 155 65 81 7143 or by email at wasserlabor@klar2o.de.

Together, we will discuss your results and support you with the next steps.

Sampling

1. Can I send water samples from different locations together?

The number of sample containers supplied is precisely matched to the amount of water required for your analysis.

Since no distinction is made between the individual containers during evaluation, you should fill all bottles at the same sampling point.

2. Are the results reported to the health department?

Your test results will be sent exclusively to you personally.

3. Do all sample containers need to be filled?

Yes, please fill all provided sample containers completely and submit the full set of samples.

The number of containers is precisely matched to the amount of water required for the analysis. Incomplete submissions cannot be processed and must be disposed of by the laboratory.

4. Why does my analysis kit include multiple bottles?

Your analysis set contains several sample containers, as different water volumes and sometimes different containers are required for the various analysis parameters.

All bottles together form the complete sample set required for a reliable and standard-compliant analysis.

5. Can I take the water sample myself?

Yes, sampling is simple and safe for you to perform yourself.

Your analysis kit includes easy-to-understand instructions that guide you through the sampling process step by step. If you follow these instructions, a reliable analysis is easily achievable.

6. How do I properly drain the water?

Carefully fill the sample containers according to the enclosed instructions. Pay particular attention to filling the containers cleanly and avoiding contamination.

All sample containers should be filled completely and then sealed tightly. Please do not open the containers until immediately before sampling.

Instructions

1. Where can I find the instructions for sampling?

Here you will find the central sampling instructions, which apply to all our water analyses.

The instructions are also included in your package.

General Questions

1. How does a water analysis with Klar2O work?

After placing your order, you will receive an analysis kit with all necessary sample containers and instructions for taking the sample.

You take the water sample according to the instructions and send it back to the specified laboratory using the enclosed shipping label.

Upon receipt of the sample, it will be analyzed in the laboratory. You will then receive your test report with the results, as well as an understandable classification and recommendation for action, conveniently by email or post.

2. Can I submit the analysis to the public health department?

No, our analyses are not approved for submission to a health authority.

They are intended exclusively for private information and orientation.

3. Is your laboratory accredited?

Our laboratory is not accredited because sampling is not carried out by trained samplers, but by you independently.

However, the analyses are carried out according to the requirements of DIN EN ISO/IEC 17025 and are based on corresponding quality standards.

In addition, we work with partner laboratories that have appropriate accreditation.

4. How often should I have my water tested?

For private households, it is advisable to have drinking water tested every 1-2 years.

Additional analyses are recommended:

  • after installations or renovations of the house's pipes
  • in case of unusual taste, smell, or discoloration
  • in case of health concerns
  • when using older pipes

This ensures that the water quality remains safe in the long term.

5. Should I have my well water tested?

Yes, regular testing of well water is strongly recommended.

Unlike public drinking water, well water is not subject to official controls and can be contaminated by environmental influences, germs, or pollutants.

6. How often should I have my well water tested?

Well water should be tested at least once a year.

For intensive use or increased risk (e.g., agricultural environment, heavy rainfall, or shallow wells), more frequent testing, approximately every 6 months, is recommended.

Additional analyses are advisable if the odor, taste, or appearance of the water changes.

7. What is the difference between lab analysis and test strips?

Test strips provide quick, rough orientation results, but their accuracy and informative value are severely limited. Many parameters can only be recorded to a limited extent or not reliably at all.

A laboratory analysis, on the other hand, is carried out under controlled conditions with precise measuring methods and enables a quantitative, reliable determination of even the smallest concentrations.

If you need reliable and well-founded results – especially for health-related questions – a laboratory analysis is by far the more reliable choice.

Irregularities in Tap Water

1. My tap water is cloudy—what does that mean?

Persistent turbidity can indicate particles in the water, such as rust, limescale, or deposits from the pipes.

This often occurs after work on the pipe network or in older installations.

If the turbidity persists or is accompanied by changes in smell or taste, the water should be examined more closely.

2. Why is my water milky and then clears up after a short time?

A whitish impression that disappears after a short time is usually caused by tiny air bubbles.

These are created by pressure conditions in the pipe and rise to the top in the glass, making the water clear again. In this case, the water is safe to drink.

3. The copper, nickel or zinc value is elevated. What does that mean?

Elevated levels of these metals can have various causes:

Copper, nickel, and zinc often originate from household installations (e.g., pipes, fittings), particularly in new or older plumbing systems.

Slightly elevated levels are not always a health concern but should be monitored. In cases of significant exceedances, it is advisable to determine the cause and take appropriate measures.

Your test report will provide a specific assessment and recommendations for action.

Questions about pollutants

1. What are PFAS and why are they dangerous?

PFAS (per- and polyfluoroalkyl substances) are a group of industrially manufactured chemicals used in many everyday products due to their water, grease, and dirt-repellent properties.

The problem is that PFAS are extremely persistent and hardly break down in the environment or the human body ("forever chemicals"). As a result, they can accumulate over time.

Some PFAS are suspected of having health effects, for example, on the immune system, hormone balance, or metabolism.

If you would like to learn more about PFAS, their sources, and risks, you can find further information in our blog post on PFAS.

2. How do I know if I have PFAS in my water?

PFAS are colorless, odorless, and tasteless and cannot be detected with the naked senses.

Therefore, contamination can only be detected through targeted laboratory analysis.

3. What does microplastics in drinking water mean?

Microplastics are tiny plastic particles (mostly <5 mm) that can enter the environment and thus also water from various sources - e.g., through the abrasion of plastics or industrial processes.

These particles can be present in very small quantities in drinking water. The health assessment is currently not yet definitively clarified but is being intensively researched.

An analysis helps to identify the presence of microplastics in one's own water and to better classify them.

4. What metals are typically found in old pipes?

In older domestic installations, the following metals, in particular, can be found in the water:

  • Lead (in very old pipes or soldered joints)
  • Copper (from copper pipes, especially under new or corrosive conditions)
  • Nickel (from fittings or nickel-plated components)
  • Zinc (from galvanized steel pipes)

The concentration of these metals can increase if water remains in the pipes for an extended period or if the installation is already old. An analysis can provide clarity here.

5. How can I reduce pollutants after the analysis?

The appropriate measures depend on the identified substances and their cause. Typical approaches are:

  • Flushing pipes (e.g., after prolonged stagnation)
  • Replacing old pipelines or fittings in case of metallic contamination
  • Installing suitable filter systems (e.g., activated carbon, reverse osmosis)
  • Adapting existing water treatment systems

Important: Measures should always be specifically tailored to the analysis results.

In your test report, you will receive concrete recommendations for action tailored to your individual situation.

6. How dangerous are bacteria in drinking water?

The danger posed by bacteria in drinking water heavily depends on the type and quantity of the germs present.

While many microorganisms are harmless, certain bacteria, such as E. coli or enterococci, can indicate fecal contamination and pose health risks.

Infants, the elderly, and immunocompromised individuals are particularly susceptible.

If you would like to learn more about bacteria, their sources, and risks, you can find further information in our blog post on bacteria in drinking water.

7. What are the legal limits in Germany?

In Germany, drinking water is subject to the legal requirements of the Drinking Water Ordinance (TrinkwV).

This ordinance sets binding limit values for numerous chemical, microbiological, and physical parameters to protect the health of consumers.

In your test report, the measured values are compared with the corresponding limit and guideline values and clearly classified.

8. What is the difference between the Drinking Water Ordinance and WHO limits?

The German Drinking Water Ordinance (TrinkwV) is legally binding in Germany and sets specific limit values that must be observed.

The guideline values of the World Health Organization (WHO), on the other hand, are scientific recommendations that serve as an international guide but are not legally binding.

Both are based on health assessments, but may differ in individual limit values.

Do you have any further questions?

Send us your request. We will get back to you as soon as possible.