Book your FREE water test
An owner (not a subcontractor) tests your water at your sink and tells you straight. St. Charles, Lincoln, Warren, Franklin and Jefferson counties.
Need your water tested?
If you are concerned about the water in your home, the free test is the start. An owner comes to your sink and checks hardness, iron, chlorine and hydrogen sulfide so you know the real numbers before you spend a dollar. We cover St. Charles County and the towns around St. Louis.
Want the instant readout for your town first? Check your water hardness here, then book the in-home test.
Our Water Testing Process
Our water testing service is designed to give you a complete picture of your water quality. Here’s how it works:
1. Comprehensive Testing
We conduct free tests on the following key elements:
- Calcium Hardness – Prevents scale buildup in pipes and appliances.
- Iron – Affects taste, smell, and may cause staining.
- Chlorine – Can make water taste and smell unpleasant.
- pH Balance – Imbalances can corrode pipes and affect water quality.
- TDS (Total Dissolved Solids) – Measures salts, minerals, and metals in your water.
- Oxygen – Low oxygen levels can impact water quality.
- Hydrogen Sulfide – Causes a “rotten egg” smell in water.
2. Additional Testing Options
If you’re concerned about other contaminants, we offer additional tests for:
- Bacteria – Essential for private well owners to ensure water safety.
- Heavy Metals – Tests for lead, arsenic, mercury, and more.
- Volatile Organic Compounds (VOCs) – Common in industrial chemicals and pesticides.
*These tests are available at an additional cost. We’ll help find the right test based on your needs.*
3. Understanding Your Results
After the test, our team will walk you through the results and explain any actions you may need to take to improve. We provide clear recommendations based on your water quality, ensuring you have all the information to make informed decisions.
Why Test Your Water?
Regular water testing is essential for maintaining your health and your home’s safety. Many water issues, like hard water, iron, and harmful bacteria, may not be visible but can significantly impact your daily life. Testing helps ensure your water is safe for consumption, use, and health.
For homebuyers, water testing for real estate transactions is crucial to verify water quality before making a purchase. By testing your water, you’re proactively safeguarding your family’s long-term health and well-being.
Schedule Your Free Water Testing Today!
Ensure your water is safe and clean with our free in-home water testing service. Our experts will help you understand your water quality and recommend the best solutions, whether it’s hard water, iron, or other contaminants.
Book the test at the top of this page, or call (636) 899-1040. Need treatment after? See our filtration systems and water softeners.
You can be a filter or you can buy a filter.
How hard is the water in our towns?
Numbers from our own town file, pulled 2026, same dataset as the Check Your Water tool. Hardness is grains per gallon.
| Town | Grains | How hard |
|---|---|---|
| St. Charles | 8.9 | Hard |
| O'Fallon | 8.0 | Hard |
| St. Peters | 9.0 | Hard |
| Dardenne Prairie | 10.0 | Very hard |
| Wentzville | 14.0 | Very hard |
| Lake St. Louis | 10.8 | Very hard |
| Wright City | 10.8 | Very hard |
| Warrenton | 16.0 | Extremely hard |
| Washington | 16.5 | Extremely hard |
| Troy | 19.2 | Extremely hard |
City water and well water in the same town can read different. That is why the in-home test matters - we test your tap.