Arsenic in Houston Water: Why Even “Safe” Levels Should Concern Families in Katy, Cypress, Richmond, Fulshear & Beyond

As Houston-area residents, we all want to believe our tap water is perfectly safe. After all, the City of Houston’s official water quality reports proudly state that our drinking water meets every federal and state standard. But here’s the uncomfortable truth: “legal” does not always equal “safe” — especially when it comes to arsenic.

At United Water Softeners, we’ve spent years helping families across Houston, Katy, Cypress, Richmond, Fulshear, and the surrounding areas protect their homes from hidden water contaminants. Arsenic is one of the most concerning we see. Even at the low levels found in our region’s water, the long-term health risks are real — and growing evidence shows we shouldn’t ignore them.

Arsenic occurs naturally in Texas groundwater, particularly in the Chicot and Evangeline aquifers that supply much of the Houston area. Houston primarily uses surface water from lakes like Conroe and Houston, blended with some groundwater. That mix keeps most readings low — but zero is not guaranteed.

According to the City of Houston’s 2024 Water Quality Report, arsenic levels at the treatment plants reached a maximum of 9.9 parts per billion (ppb) — just under the EPA’s legal limit of 10 ppb. Averages typically hover between 1.5 and 2.6 ppb. In some suburban systems and private wells around Katy and Cypress, detections can be higher because of local geology.

The Environmental Working Group (EWG) sets a much stricter public health goal of just 0.004 ppb for arsenic. By that standard, Houston’s water is often hundreds of times higher than what independent health experts consider ideal.

Arsenic is a known carcinogen. Long-term exposure — even at low levels — has been linked to increased risks of skin, lung, bladder, and kidney cancers, as well as cardiovascular disease, diabetes, and developmental issues in children. A 2024 Texas A&M study found that counties with drinking water arsenic between 1–5 ppb and above 5 ppb had noticeably higher kidney cancer rates compared to areas with less than 1 ppb. That’s a dose-response relationship in our own backyard.

The EPA itself admits its 10 ppb standard is a compromise between health protection and the cost of treatment. For families drinking this water every day for decades, that compromise may not be good enough.

Private wells in the Houston suburbs are an even bigger concern. Many aren’t regularly tested, and arsenic can vary widely from one street to the next.

At United Water Softeners, we don’t think “meets minimum standards” is the standard your family deserves. That’s why we recommend our flagship SENTINEL ELITE FILTRATION Package — the most advanced whole-home water softening and purification system designed specifically for Houston-area water challenges like arsenic.

The SENTINEL ELITE FILTRATION Package features the powerful Guardian ELITE softener equipped with a hybrid specialized resin blend that delivers superior softening while also reducing ammonia. It is paired with the integrated AQUACARB ELITE™ purifier, which utilizes our exclusive Cubulation K-5 media (based on proven KDF-55 technology) combined with high-grade catalytic carbon. This advanced combination effectively removes arsenic, heavy metals, chlorine, and other harmful contaminants, delivering crystal-clear, great-tasting water throughout your entire home.

Every SENTINEL ELITE FILTRATION Package is backed by a lifetime warranty and our exclusive FREEZE PROTECTION POLICY for complete peace of mind.

For the purest drinking water possible, we pair the SENTINEL ELITE FILTRATION with our affordable PUREGUARD™ PGRO-4 Reverse Osmosis system, which can reduce arsenic by up to 99% right at your kitchen tap. The PUREGUARD™ delivers purified water on demand 24/7 and includes a leak detector, leak tray, pressure regulator, and spill-resistant cartridges — all backed by a 5-year warranty on parts.

Whether you’re in Katy, Cypress, Richmond, Fulshear, Montgomery, Magnolia or anywhere across greater Houston, the SENTINEL ELITE FILTRATION Package gives your family complete control over what’s in your water.

Anyone can sell a softener. We provide true FILTRATION.

If you’re concerned about arsenic levels in Houston water — or just want the facts about your specific address — contact us today. Our water treatment specialists offer free water testing and honest recommendations tailored to your home.

Protect your family with the peace of mind that comes from knowing exactly what’s in your water and having the right system to handle it. Upgrade to cleaner, safer water with United Water Softeners — serving Houston, Katy, Cypress, Richmond, Fulshear, Conroe and all surrounding communities.

Get your free water test and quote today. Your family’s health is worth it.

Want to know if you have arsenic in your water? It’s quick, free, and easy to find out exactly what’s in your tap using the Environmental Working Group’s Tap Water Database.

Here’s how to pull up your local water report in under 30 seconds:

1. Visit EWG.org/tapwater
2. Enter your zip code or city name (Houston, Katy, Cypress, Richmond, Manvel, Fulshear, or surrounding areas)
3. Select your water utility from the list that appears

You’ll instantly see a detailed breakdown of arsenic levels and dozens of other contaminants, plus a clear comparison between federal legal limits and EWG’s much stricter public-health guidelines.

While these reports are a great starting point, water quality can vary from street to street and between the treatment plant and your faucet — especially with private wells. For the most accurate picture of your home’s water, we recommend a professional in-home test.

At United Water Softeners, we offer free water testing and honest recommendations for families throughout Houston, Katy, Cypress, Richmond, Fulshear, and the surrounding areas. Let us show you how the Sentinel Elite Package can give your family cleaner, safer water every day. Contact us today to schedule your free test!