If you’re wondering what to expect from a free in-home water test in Irvine, one of the most valuable measurements you’ll receive is your home’s Total Dissolved Solids (TDS) reading. TDS measures the total amount of dissolved minerals, salts, and other naturally occurring substances in your water. During a professional Free, In-Home Water Test, we’ll measure your TDS on-site, explain what the number means, and discuss whether any treatment options may benefit your home. The goal isn’t to sell you equipment—it’s to help you understand your water.

One of the first things homeowners ask me during a water test is: “Brian…what exactly is TDS?”
I’m Brian McCowin. My family has been helping Orange County homeowners understand their water since 1972. It’s a great question because TDS is one of those terms people hear often but rarely have explained clearly.
Think about making a cup of coffee. The water looks clear, but once the coffee brews, you know that the water is carrying thousands of dissolved compounds that you can’t see.
Water in your home works much the same way. Just because water looks clean doesn’t mean it’s made up of pure H₂O alone. That’s why testing matters.
What are Total Dissolved Solids (TDS)?
TDS stands for Total Dissolved Solids.
It refers to the combined amount of dissolved substances naturally present in water.
These may include:
- Naturally occurring minerals
- Calcium
- Magnesium
- Sodium
- Small amounts of dissolved salts
- Other dissolved inorganic materials
TDS is typically reported as parts per million (ppm) or milligrams per liter (mg/L).
A TDS reading tells us how much dissolved material is present, and it does not, by itself, identify exactly which substances make up that number.
That’s why TDS is one part of a complete water evaluation.
Why is TDS measured during a Free, In-Home Water Test?
Here’s an insider secret from more than fifty years in the business. TDS is one of the quickest ways to begin understanding your home’s water.
During your Free, In-Home Water Test, we don’t just record the number.
We explain what it means in the context of:
- Your home’s water source
- Water hardness
- Chlorine or chloramines
- Your family’s water concerns
- Your treatment goals
The number only becomes valuable when it’s interpreted correctly.

What should I expect during the TDS test?
The process is simple. We perform the testing right at your home so that you can see the reading as it’s measured.
Then we’ll explain:
- What does your TDS level indicate?
- How does it compare with your overall water quality?
- Whether additional treatment should even be considered.
- Which options may be appropriate for your home?
You’ll receive answers immediately, as we do not send your sample to a lab and ask you to wait several days.
Does a high TDS reading automatically mean I need a water filtration system?
Not necessarily. This is where honest advice matters. A TDS reading is only one piece of the puzzle.
Before making any recommendation, we also consider:
- Water hardness
- Household water usage
- Plumbing configuration
- Taste preferences
- Existing water treatment equipment
- Your family’s goals
No responsible company should recommend equipment based on a single number alone.
Why do different homes have different TDS readings?
Several factors can influence TDS levels, including:
- Your municipal water supply
- Naturally occurring minerals
- Seasonal variations
- Local water sources
- Regional treatment practices
Even neighboring homes may have slightly different readings depending on plumbing and water usage patterns. That’s why every home should be tested individually.
Why do different companies recommend different treatment systems?
Many companies only sell one manufacturer’s products, which creates a challenge.
At McCowin Water, we’re like an Auto Mall for water.
We’re not tied to one manufacturer. We carry a broad selection of premium water treatment technologies because every home’s water is different. That flexibility allows us to recommend what’s best for your water and not what’s sitting in our warehouse.
What questions should I ask about my TDS results?
A professional consultation should answer questions like:
- What does my TDS number actually mean?
- Is this typical for Irvine?
- Is TDS affecting the taste of my water?
- Should I also be concerned about hardness?
- Would reverse osmosis benefit my home?
- Are there treatment options that fit my goals?
The goal isn’t simply to give you a number. It’s to help you understand what that number means.

Understanding Your TDS Test
| During Your Free Water Test | Why It Matters |
|---|---|
| ➤ TDS Measurement | Shows the total amount of dissolved material in your water. |
| ➤ Water Hardness Test | Helps identify mineral-related issues. |
| ➤ Chlorine or Chloramine Testing | Evaluates disinfectant levels in your water supply. |
| ➤ Professional Explanation | Helps you understand what your results actually mean. |
| ➤ Customized Recommendations | Based on your home’s complete water profile, not a single reading. |
| ➤ Immediate Results | No waiting for outside laboratory reports. |
A complete water evaluation looks at the whole picture and not just one measurement.
What is the smartest first step if I’m curious about my TDS?
The smartest first step is scheduling a professional Free, In-Home Water Test. There’s nothing to prepare or to mail, and even nothing to pay.
We’ll perform professional testing right at your kitchen sink, explain your TDS reading in plain English, and answer every question you have. Knowledge is the foundation of every good water treatment decision.
The McCowin Promise
For more than fifty years, we’ve helped Orange County homeowners understand their water through professional testing, honest recommendations, and customized solutions.
“If the system we install doesn’t perform the way we promised… If your water doesn’t taste, feel, or behave the way we said it would… We’ll pull the whole system out. And either replace it or make it right. No fine print. Because your trust is worth more than the sale.”
Schedule Your Free, In-Home Water Test
If you’re wondering what to expect from a free in-home water test in Irvine, we’d love to show you.
We perform professional, on-site testing right at your kitchen sink, including measuring your Total Dissolved Solids (TDS), water hardness, and other key water quality indicators. You’ll receive immediate results, straightforward explanations, and honest recommendations with absolutely zero sales pressure.
Call us at (949) 569-5736 or Schedule a Free, In-Home Water Test today and discover exactly what your water is telling you.
CSLB: C-55 #1022717
What are Total Dissolved Solids (TDS) in water?
What should I expect from a free in-home water test in Irvine?
Does a high TDS reading mean I need a water filtration system?
Posted on Google Daniel VuTrustindex verifies that the original source of the review is Google. I want to thank McCowin Water for the excellent service provided. A special recognition goes to Joel A. for his professionalism, friendly demeanor, and positive “can-do” attitude throughout the installation. Joel made the entire process smooth and worry-free, and his approach truly reflects the quality of service McCowin Water stands for.Posted on Google Reza OhadiTrustindex verifies that the original source of the review is Google. Great workPosted on Google Richard HoffpauerTrustindex verifies that the original source of the review is Google. Braulio was thorough, professional, informative, and polite. When he noticed our chlorine level was a little high he asked if he could see our soft water unit. He noted that apparently I had forgotten to turn it back on when we got back from vacation. Problem solved. I hope all of your employees are as efficient and friendly as Braulio. He’s up-and-coming for sure. Don’t let him get away.Posted on Google Maureena KosareffTrustindex verifies that the original source of the review is Google. I am super impressed with the professionalism and work ethic of my water softener installers. They had to do things differently from planned and easily adjusted to the new method and positioning. They kept me well informed and their interaction with eachother was so very professional, informative, and patient.Posted on Google Mark BallardTrustindex verifies that the original source of the review is Google. It was a pleasure working with Brian and his team. The whole experience was the best I’ve had with any company I’ve dealt with. Professional and honest with a warranty from a well established company that will be around for the long term. I’ve worked with companies in the past that weren’t there when I needed them. Thank you again to the whole team Mark BallardPosted on Google Emilie PetrozziTrustindex verifies that the original source of the review is Google. Braulio was very informative, answered all my questions with thoughtfulness, and was very pleasant. Great service!Posted on Google Quinn HawksworthTrustindex verifies that the original source of the review is Google. Chris was exceptional during our first water test and sales experience. Joel our technician was awesome. Everything was done very well. 5 stars all the way around.Posted on Google AdamTrustindex verifies that the original source of the review is Google. Top-notch experience - professional, no hidden fees, communicated clearly and efficiently. Got the job done as promised, no drama.Posted on Google Teresa PTrustindex verifies that the original source of the review is Google. Braulio did a fantastic job installing our reverse osmosis system! Mccowin has always treated us so well since we had them put our first soft water system and drinking water system in our home back in 2010. Thank you