Hilltop Estates WSC

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: 69 people
Connections: 23
Water source: Groundwater
Based in: Sanger, TX
County: Denton
Owner: Local government

The ZIP code it serves

76266

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

Fluoride, total trihalomethanes (TTHM), haloacetic acids (HAA5), nitrate, chromium (total), arsenic and uranium: Texas’s own results, samples taken from Oct. 8, 2020 to June 17, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits5

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.82ppm

Highest yearly average, 2022 to 2025

2025 average: 0.79 ppm

Averaged by year, the highest was 0.82 ppm, in 2022, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.85 ppm. In 2025, the latest year on file, its two samples averaged 0.79 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.85 ppm, in 2016.

What handles it

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

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

12.2ppb

Highest yearly average, 2022 to 2025

2025, one sample: 10.2 ppb

Averaged by year, the highest was 12.2 ppb, in 2022, below EPA’s legal limit of 80 ppb. In 2025, the latest year on file, its one sample was 10.2 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 2.4 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

3.9ppb

Highest yearly average, 2022 to 2025

Averaged by year, the highest was 3.9 ppb, in 2025, below EPA’s legal limit of 60 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 2.0 ppb, in 2019.

What handles it

No certification claim covers this compound yet.

Nitrate

Comes from the source

Below EPA’s limits

0.23ppm

Highest sample; found in 14 of 14

2026 average: 0.078 ppm

The highest sample, in 2022, was 0.23 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its two samples averaged 0.078 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.43 ppm, in 2014.

What handles it

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

Chromium (total)

Comes from the source

Below EPA’s limits

1.9ppb

Highest yearly average, 2022 to 2025

Averaged by year, the highest was 1.9 ppb, in 2025, below EPA’s legal limit of 100 ppb. Its highest single sample was 2.1 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 6.3 ppb, in 2013.

What handles it

NSF/ANSI 58 look for “Chromium (Hexavalent) Reduction”
NSF/ANSI 53 look for “Chromium Reduction”

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

Arsenic
Lead
Uranium

Violations since 2016

No health-based violations on file with EPA since 2016. There are 16 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

Everything else. Fluoride, total trihalomethanes (TTHM), haloacetic acids (HAA5), nitrate, chromium (total), arsenic and uranium results here are Texas’s own from 2020 on, with EPA’s national file for 2012 to 2019. Hilltop Estates WSC’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 Oct. 8, 2020 to June 17, 2026.

Testing your own tap

Hilltop Estates WSC’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 Hilltop Estates WSC serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

Pace Analytical Services, LLC -Dallas TX
Allen, TX · about 35 miles
Certified for bacteria
(972) 727-1123
Southern Petroleum Laboratories, Inc. - Plano
Plano, TX · about 39 miles
Certified for bacteria, lead and copper
(972) 424-6422
Pace Analytical Services, LLC -Dallas TX
Fort Worth, TX · about 40 miles
Certified for bacteria
(817) 616-5030

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