Hill Country Northwest Cherry Hollow

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: 1,002 people
Connections: 334
Water source: Groundwater
Based in: Austin, TX
County: Travis
Owner: Private

The ZIP code it serves

78641

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. 3 health-based violations since 2016.

What was found

Fluoride, nitrate, arsenic, chromium (total), haloacetic acids (HAA5), total trihalomethanes (TTHM) and uranium: Texas’s own results, samples taken from March 5, 2020 to June 23, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits2

Fluoride

Forms or is added in treatment

Below EPA’s limits

1.6ppm

Highest yearly average, 2021 to 2024

2024 average: 1.5 ppm

Averaged by year, the highest was 1.6 ppm, in 2021, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 2.5 ppm. In 2024, the latest year on file, its two samples averaged 1.5 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 2.7 ppm, in 2014.

What handles it

NSF/ANSI 58 look for “Fluoride Reduction”
NSF/ANSI 53 look for “Fluoride”

Nitrate

Comes from the source

Below EPA’s limits

0.14ppm

Highest sample; found in 5 of 14

2026: not found

The highest sample, in 2020, was 0.14 ppm, below EPA’s legal limit of 10 ppm. In 2026, 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 sample of 0.28 ppm, in 2014.

What handles it

NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”

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

Arsenic
Chromium (total)
Haloacetic acids (HAA5)
Lead
Total trihalomethanes (TTHM)
Uranium

Violations since 2016

Contaminant or rule	Type	Period	Measured	Status
Gross alpha radiation (excluding radon and uranium)	The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average	July 1, 2016 to Sept. 30, 2016	16 PCI/L	Resolved
Gross alpha radiation (excluding radon and uranium)	The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average	April 1, 2016 to June 30, 2016	16 PCI/L	Resolved
Gross alpha radiation (excluding radon and uranium)	The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average	Jan. 1, 2016 to March 31, 2016	16 PCI/L	Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 7 monitoring or reporting violations not shown.

What this report can’t tell you

Everything else. Fluoride, nitrate, arsenic, chromium (total), haloacetic acids (HAA5), total trihalomethanes (TTHM) and uranium results here are Texas’s own from 2020 on, with EPA’s national file for 2012 to 2019. Hill Country Northwest Cherry Hollow’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 March 5, 2020 to June 23, 2026.

Testing your own tap

Hill Country Northwest Cherry Hollow’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 Hill Country Northwest Cherry Hollow serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

Integrity Testing, Inc.
Austin, TX · about 14 miles
Certified for lead and copper
(512) 891-7777
Texas Department of State Health Services Laboratory Services Section
Austin, TX · about 19 miles
Certified for bacteria, lead and copper
(512) 458-7318
Aqua-Tech Laboratories, Inc.
Austin, TX · about 29 miles
Certified for bacteria, lead and copper
(512) 301-9559

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