Home › Well Water Treatment › Well Water Testing

Well Water Testing in the Brazos Valley: What to Test For and When

City water is tested constantly. A private well is tested only when its owner does it. Here is what Brazos Valley well owners should test for, how often, and how the results point to the right treatment.

By Brazos Valley Water ProsBryan & College Station, TXUpdated Oct 20264 min read

The short answer

Private wells are not regulated or tested by the city. Testing is up to the owner.
Test for bacteria and nitrate every year, using a certified lab.
Test hardness, iron, sulfur, dissolved solids and pH before choosing any treatment equipment.
Retest after flooding, well repairs, or any change in taste, smell or color.

Get your free water consultation →Take the 3-question online quiz. It takes under 30 seconds.

If your home is on a private well outside the Bryan and College Station city systems, nobody is testing your water but you. Wells across the Brazos Valley vary a lot, even between neighboring properties. Some have soft, clean water. Others test hard, carry iron, or smell of sulfur. Testing is the only way to know what you have.

Why well owners need to test

City water is treated, disinfected and tested on a schedule, and the results are published every year. Private wells are not covered by those rules. Many well problems, including bacteria and nitrate, have no taste, smell or color, so a well can seem fine and still have an issue.

What to test for

Test	Why it matters	Signs you might notice
Total coliform and E. coli bacteria	Health. Can enter through a damaged well cap, casing or flooding.	Usually none
Nitrate	Health, especially for infants. More likely near fields, livestock or septic systems.	None
Hardness	Scale on fixtures, water heaters and appliances.	White crust, soap scum, spots
Iron and manganese	Staining and taste.	Orange, brown or black stains; metallic taste
Hydrogen sulfide	Odor.	Rotten-egg smell, often worse in hot water
Dissolved solids (TDS) and sodium	Taste.	Salty or mineral taste
pH	Corrosion of pipes and fixtures.	Blue-green stains, pinhole leaks

How often to test

Every year: bacteria and nitrate.
Every few years, or before buying equipment: hardness, iron, manganese, sulfur, dissolved solids and pH.
Right away: after flooding near the well, after well or pump repairs, when a baby joins the household, or any time the water changes in taste, smell or color.

Buying a home with a well? Test before closing. It is the easiest time to find a problem and plan for treatment.

Where to get your well tested

For bacteria and nitrate, use a laboratory accredited by the Texas Commission on Environmental Quality (TCEQ), and follow its sampling instructions closely. Bacteria samples in particular have to be collected and delivered a specific way to be accurate. Texas A&M AgriLife Extension's Texas Well Owner Network also holds water screening events for well owners around the state.

Home test strips are useful for a quick check of hardness, iron or pH, but they are not a substitute for a lab test for bacteria or nitrate.

From test results to treatment

Once you know your numbers, the right treatment usually follows:

Hard water (around 7 grains per gallon or more): a water softener is often the right call. Unlike city water here, some wells really do need one. See when a softener makes sense.
Iron or rotten-egg smell: catalytic carbon for light iron and sulfur, or an added air-injection iron and sulfur filter for heavier problems.
Salty taste or high dissolved solids: reverse osmosis for drinking water.
Bacteria: find and fix the source first, such as a damaged well cap, then disinfect the well. Ongoing disinfection, such as UV treatment, may be recommended.

Most wells need more than one fix, and the order matters. For example, iron is usually treated before a softener.

What Brazos Valley Water Pros installs for wells: a sediment prefilter, a catalytic carbon tank for light sulfur smell and moderate iron, UV disinfection to kill bacteria and viruses, and reverse osmosis for drinking water. Heavy iron (orange stains) or a strong rotten-egg smell gets an added air-injection iron and sulfur filter in front of the carbon. Start with a certified lab test, then take our free online water quiz and we'll recommend the right setup for your well. Learn more about well water treatment.

Common questions

How often should I test my well water?

Test for bacteria and nitrate every year. Test hardness, iron, sulfur, dissolved solids and pH every few years or before buying treatment equipment. Retest after flooding, well repairs or any change in your water.

Can I use a home test kit for my well?

Home kits are fine for a quick check of hardness, iron or pH. For bacteria and nitrate, use a lab accredited by the Texas Commission on Environmental Quality.

Does well water need a water softener?

Only if it tests hard. Wells in the Brazos Valley vary, and some do test hard. A hardness test tells you whether a softener makes sense.

Why does my well water smell like rotten eggs?

That smell usually comes from hydrogen sulfide gas in the water. It is often stronger in hot water and is treated with a filter designed for sulfur.

Is well water safer than city water?

Not automatically. City water is disinfected and tested on a schedule. A private well can be excellent, but only regular testing shows whether it is.

Find out what your water actually needs

Take the free 3-question online quiz, then talk with us by phone or text. We'll recommend a system based on your answers and what we see in water across your area. Every system is installed by licensed independent plumbers, with no high-pressure sales visit.

Get Your Free Water Consultation → Or call or text (979) 721-5597

This article is general guidance for private well owners. Test results and treatment needs vary from well to well; a certified lab test gives you exact answers.