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Water quality · New Braunfels

What's in New Braunfels water, by the numbers

New Braunfels tap water is safe to drink, rated Superior by TCEQ, and reported no violations in NBU's latest annual report. It's also very hard, roughly 16 to 17 grains per gallon at most treatment entry points in state compliance samples, with a disinfectant residual on the stronger side. Here are the numbers, with sources.

Looking for service instead of data? Water treatment in New Braunfels

The headline numbers

Very hard, river-fed, and growing fast

These come from NBU's own Water Quality Report and TCEQ's compliance sampling records for the system.

16gpg

Typical hardness at most entry points (16 to 17 range)

TCEQ, 2025

406mg/L

Highest recent state sample (as CaCO₃)

TCEQ, 2025

2.58ppm

Average total chlorine residual at the tap

2025 CCR

3

Main sources: the Guadalupe River plus Edwards and Trinity wells

2025 CCR

The Water Quality Association calls anything over 10.5 gpg (180 mg/L) “very hard,” the top of its scale. Every recent state sample for the NBU system lands at or past that line.

Where the water comes from

Most New Braunfels homes are served by New Braunfels Utilities. The majority of the water is Guadalupe River water treated at the Gruene Road surface water plant, blended with groundwater from Edwards and Trinity aquifer wells. NBU also buys water from Green Valley SUD and the Guadalupe-Blanco River Authority as needed, and it's expanding the river plant to keep up with growth.

One detail worth knowing when you shop for filtration. NBU's report lists its residual as total chlorine, and local reporting says the system uses chloramine, which is chlorine bonded with ammonia. Chloramine needs a specific media, catalytic carbon, to remove well. Confirming what's actually in your water is part of the free test.

One caveat: some addresses in and around New Braunfels are served by other utilities, like Crystal Clear WSC to the northeast, Canyon Lake Water Service out FM 306, Springs Hill WSC toward Seguin, or Green Valley SUD to the southeast. Your water bill says which system is yours, and the free test works the same either way.

From the reports

Notable readings, next to their limits

A CCR lists everything detected. These are the entries homeowners ask about, from NBU's 2025 report.

SubstanceReportedLimitStatus
Nitrate2.6 ppm (highest)10 ppm (MCL)Within limit
Fluoride0.49 ppm4 ppm (MCL)Within limit
Total trihalomethanes (TTHM)79 ppb (highest running average)80 ppb (MCL)Within limit
Haloacetic acids (HAA5)31 ppb (highest running average)60 ppb (MCL)Within limit
Lead (90th percentile, 2023–2025)1.7 ppb15 ppb (action level)Within limit
Copper (90th percentile, 2023–2025)0.14 ppm1.3 ppm (action level)Within limit

NBU's 2025 report shows no violations of any kind. The 2024 report shows one paperwork item, a routine disinfection byproduct test that was missed one month and disclosed. It's worth watching that the highest trihalomethane running average came in at 79 ppb against an 80 ppb limit, within the rules but without much room, which is common for systems that treat river water.

On PFAS, NBU's 2024 federal sampling detected a handful of compounds in the low parts-per-trillion, each shown in the report without a violation. PFOA and PFOS, the two with final EPA limits, aren't among the listed detections.

Which numbers are about safety, and which aren't

The table above is the safety layer. It covers regulated substances with legal limits, monitored constantly and publicly reported. That system works, and New Braunfels water passes it with a Superior rating from the state.

Hardness and chlorine taste live in a different category. The EPA doesn't set health limits for them because they aren't health problems. They're quality-of-life items. In fact, NBU's recent reports don't publish a hardness number at all, so the figures up top come from TCEQ's own sampling of the treated water. They're also what you actually notice every day, and what treatment exists to fix. The safety layer stays the utility's job either way.

What a free test adds to NBU's report

NBU's reports don't publish hardness or TDS, and the state samples that do exist show real differences from one entry point to another, from about 180 to over 400 mg/L. Your house is one tap at the end of one path through that system. The free in-home test measures hardness, chlorine, iron, and TDS at your own tap, and you keep the results.

Book the free test

Sources

Figures reflect the most recent official reports at the time of writing. CCRs update annually.

Get your tap's own numbers

The free test takes about 30 minutes at your kitchen sink. We measure hardness, chlorine, iron, and TDS, and we explain every number in plain English. The utility tests the system, and we test your house.

What you get

  • Hardness, chlorine, iron, and TDS tested at your tap
  • Results explained in plain English, yours to keep
  • A recommendation sized to your home (only if you want one)
Book your free water test