Estates of Willow Creek

What EPA’s and Texas’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals; lead and copper; and violations since 2016, with the certification that handles each result.

Serves: 714 people
Connections: 238
Water source: Groundwater
Based in: Austin, TX
County: Harris
Owner: Private

The ZIP code it serves

77375

The short answer

Nothing in EPA’s and Texas’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, plus lead and copper, not everything. No health-based violations on file since 2016.

What was found

Total trihalomethanes (TTHM), haloacetic acids (HAA5), arsenic, chromium (total), fluoride, nitrate and uranium: Texas’s own results, samples taken from Aug. 12, 2020 to Sept. 23, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits2

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

50.2ppb

Highest yearly average, 2020 to 2025

2025: not found

Averaged by year, the highest was 50.2 ppb, in 2022, below EPA’s legal limit of 80 ppb. In 2025, the latest year on file, it wasn’t found in any of its two samples. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 7.0 ppb, in 2019.

What handles it

NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

6.3ppb

Highest yearly average, 2020 to 2025

2025: not found

Averaged by year, the highest was 6.3 ppb, in 2022, below EPA’s legal limit of 60 ppb. In 2025, the latest year on file, it wasn’t found in any of its two samples.

What handles it

No certification claim covers this compound yet.

6 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.

Arsenic
Chromium (total)
Fluoride
Lead
Nitrate
Uranium

Violations since 2016

No health-based violations on file with EPA since 2016.

What this report can’t tell you

Everything else. Total trihalomethanes (TTHM), haloacetic acids (HAA5), arsenic, chromium (total), fluoride, nitrate and uranium results here are Texas’s own from 2020 on, with EPA’s national file for 2012 to 2019. Estates of Willow Creek’s own annual report, which it must send you every year, has the contaminants this page does not show.
Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.
What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.
Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; Texas’s results run from Aug. 12, 2020 to Sept. 23, 2026.

Testing your own tap

Estates of Willow Creek’s results are for the water it sends out. What your own service line, solder and fixtures add shows up only in a test of your tap, by a lab Texas certifies.

The 3 labs Texas certifies closest to the area Estates of Willow Creek serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

Water Utility Services, Inc.
Spring, TX · about 7 miles
Certified for bacteria
(281) 290-0704
Eurofins EMLab P&K – Houston
Houston, TX · about 16 miles
Certified for bacteria
(281) 940-2580
Nova Biologicals, Inc.
Conroe, TX · about 17 miles
Certified for bacteria
(936) 756-5333

Texas Well Owner Network, Texas A&M AgriLife Extension: Well Informed screening events, where well owners bring in water samples to be screened for common contaminants, followed by an hour-long session explaining the results. Upcoming events are on the network's calendar. Trainings, Texas Well Owner Network.

All 80 certified labs for Texas